1250 lines
38 KiB
JavaScript
1250 lines
38 KiB
JavaScript
/**
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* @fileoverview Implements the RL11 Disk Controller (for RL01 and RL02 Disks)
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* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
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* @copyright © Jeff Parsons 2012-2016
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*
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* This file is part of PCjs, a computer emulation software project at <http://pcjs.org/>.
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*
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* PCjs is free software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* PCjs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCjs. If not,
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* see <http://www.gnu.org/licenses/gpl.html>.
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*
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* You are required to include the above copyright notice in every modified copy of this work
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* and to display that copyright notice when the software starts running; see COPYRIGHT in
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* <http://pcjs.org/modules/shared/lib/defines.js>.
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*
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* Some PCjs files also attempt to load external resource files, such as character-image files,
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* ROM files, and disk image files. Those external resource files are not considered part of PCjs
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* for purposes of the GNU General Public License, and the author does not claim any copyright
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* as to their contents.
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*/
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"use strict";
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if (NODE) {
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var str = require("../../shared/lib/strlib");
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var web = require("../../shared/lib/weblib");
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var DiskAPI = require("../../shared/lib/diskapi");
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var Component = require("../../shared/lib/component");
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var State = require("../../shared/lib/state");
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var PDP11 = require("./defines");
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var MessagesPDP11 = require("./messages");
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var DiskPDP11 = require("./disk");
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}
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/**
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* RL11(parms)
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*
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* The RL11 component has the following component-specific (parms) properties:
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*
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* autoMount: one or more JSON-encoded objects, each containing 'name' and 'path' properties
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*
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* @constructor
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* @extends Component
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* @param {Object} parms
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*/
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function RL11(parms)
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{
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Component.call(this, "RL11", parms, RL11, MessagesPDP11.RL11);
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/*
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* We record any 'autoMount' object now, but we no longer parse it until initBus(),
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* because the Computer's getMachineParm() service may have an override for us.
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*/
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this.configMount = parms['autoMount'] || null;
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this.cAutoMount = 0;
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/*
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* The RL11 has two Drive Select bits, representing up to four drives.
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*/
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this.nDrives = 4;
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this.aDrives = new Array(this.nDrives);
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this.fLocalDisks = (!web.isMobile() && window && 'FileReader' in window);
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}
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Component.subclass(RL11);
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/*
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* There's nothing super special about these values, except that NONE should be falsey and the others should not.
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*/
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RL11.SOURCE = {
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NONE: "",
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LOCAL: "?",
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REMOTE: "??"
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};
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/**
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* setBinding(sType, sBinding, control, sValue)
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*
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* @this {RL11}
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* @param {string|null} sType is the type of the HTML control (eg, "button", "list", "text", etc)
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* @param {string} sBinding is the value of the 'binding' parameter stored in the HTML control's "data-value" attribute (eg, "listDisks")
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* @param {Object} control is the HTML control DOM object (eg, HTMLButtonElement)
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* @param {string} [sValue] optional data value
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* @return {boolean} true if binding was successful, false if unrecognized binding request
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*/
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RL11.prototype.setBinding = function(sType, sBinding, control, sValue)
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{
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var rl11 = this;
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switch (sBinding) {
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case "listDisks":
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this.bindings[sBinding] = control;
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control.onchange = function onChangeListDisks(event) {
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var controlDesc = rl11.bindings["descDisk"];
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var controlOption = control.options[control.selectedIndex];
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if (controlDesc && controlOption) {
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var dataValue = {};
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var sValue = controlOption.getAttribute("data-value");
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if (sValue) {
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try {
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dataValue = eval("(" + sValue + ")");
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} catch (e) {
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Component.error("RL11 option error: " + e.message);
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}
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}
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var sHTML = dataValue['desc'];
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if (sHTML === undefined) sHTML = "";
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var sHRef = dataValue['href'];
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if (sHRef !== undefined) sHTML = "<a href=\"" + sHRef + "\" target=\"_blank\">" + sHTML + "</a>";
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controlDesc.innerHTML = sHTML;
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}
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};
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return true;
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case "descDisk":
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case "listDrives":
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this.bindings[sBinding] = control;
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/*
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* I tried going with onclick instead of onchange, so that if you wanted to confirm what's
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* loaded in a particular drive, you could click the drive control without having to change it.
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* However, that doesn't seem to work for all browsers, so I've reverted to onchange.
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*/
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control.onchange = function onChangeListDrives(event) {
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var iDrive = str.parseInt(control.value, 10);
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if (iDrive != null) rl11.displayDisk(iDrive);
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};
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return true;
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case "loadDrive":
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this.bindings[sBinding] = control;
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control.onclick = function onClickLoadDrive(event) {
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var controlDisks = rl11.bindings["listDisks"];
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if (controlDisks) {
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var sDiskName = controlDisks.options[controlDisks.selectedIndex].text;
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var sDiskPath = controlDisks.value;
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rl11.loadSelectedDrive(sDiskName, sDiskPath);
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}
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};
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return true;
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case "saveDrive":
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/*
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* Yes, technically, this feature does not require "Local disk support" (which is really a reference
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* to FileReader support), but since fLocalDisks is also false for all mobile devices, and since there
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* is an "orthogonality" to disabling both features in tandem, let's just let it slide, OK?
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*/
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if (!this.fLocalDisks) {
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if (DEBUG) this.log("Local disk support not available");
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/*
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* We could also simply hide the control; eg:
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*
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* control.style.display = "none";
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*
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* but removing the control altogether seems better.
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*/
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control.parentNode.removeChild(/** @type {Node} */ (control));
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return false;
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}
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this.bindings[sBinding] = control;
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control.onclick = function onClickSaveDrive(event) {
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var controlDrives = rl11.bindings["listDrives"];
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if (controlDrives && controlDrives.options && rl11.aDrives) {
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var iDriveSelected = str.parseInt(controlDrives.value, 10) || 0;
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var drive = rl11.aDrives[iDriveSelected];
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if (drive) {
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/*
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* Note the similarity (and hence factoring opportunity) between this code and the HDC's "saveHD*" binding.
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*/
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var disk = drive.disk;
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if (disk) {
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if (DEBUG) rl11.println("saving disk " + disk.sDiskPath + "...");
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var sAlert = web.downloadFile(disk.encodeAsBase64(), "octet-stream", true, disk.sDiskFile.replace(".json", ".img"));
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web.alertUser(sAlert);
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} else {
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rl11.notice("No disk loaded in drive.");
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}
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} else {
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rl11.notice("No disk drive selected.");
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}
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}
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};
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return true;
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case "mountDrive":
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if (!this.fLocalDisks) {
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if (DEBUG) this.log("Local disk support not available");
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/*
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* We could also simply hide the control; eg:
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*
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* control.style.display = "none";
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*
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* but removing the control altogether seems better.
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*/
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control.parentNode.removeChild(/** @type {Node} */ (control));
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return false;
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}
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this.bindings[sBinding] = control;
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/*
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* Enable "Mount" button only if a file is actually selected
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*/
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control.addEventListener('change', function() {
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var fieldset = control.children[0];
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var files = fieldset.children[0].files;
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var submit = fieldset.children[1];
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submit.disabled = !files.length;
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});
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control.onsubmit = function(event) {
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var file = event.currentTarget[1].files[0];
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if (file) {
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var sDiskPath = file.name;
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var sDiskName = str.getBaseName(sDiskPath, true);
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rl11.loadSelectedDrive(sDiskName, sDiskPath, file);
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}
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/*
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* Prevent reloading of web page after form submission
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*/
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return false;
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};
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return true;
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default:
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break;
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}
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return false;
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};
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/**
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* initBus(cmp, bus, cpu, dbg)
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*
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* @this {RL11}
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* @param {ComputerPDP11} cmp
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* @param {BusPDP11} bus
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* @param {CPUStatePDP11} cpu
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* @param {DebuggerPDP11} dbg
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*/
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RL11.prototype.initBus = function(cmp, bus, cpu, dbg)
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{
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this.cmp = cmp;
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this.bus = bus;
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this.cpu = cpu;
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this.dbg = dbg;
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this.configMount = this.cmp.getMachineParm('autoMount') || this.configMount;
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if (this.configMount) {
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if (typeof this.configMount == "string") {
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try {
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/*
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* The most likely source of any exception will be right here, where we're parsing
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* this JSON-encoded data.
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*/
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this.configMount = eval("(" + this.configMount + ")");
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} catch (e) {
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Component.error("RL11 auto-mount error: " + e.message + " (" + this.configMount + ")");
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this.configMount = null;
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}
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}
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}
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/*
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* If we didn't need auto-mount support, we could defer controller initialization until we received
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* a powerUp() notification, at which point reset() would call initController(), or restore() would restore
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* the controller; in that case, all we'd need to do here is call setReady().
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*/
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this.initController();
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this.triggerInterrupt = this.cpu.addTrigger(PDP11.RL11.VEC, PDP11.RL11.PRI);
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bus.addIOTable(this, RL11.UNIBUS_IOTABLE);
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bus.addResetHandler(this.reset.bind(this));
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this.addDisk("None", RL11.SOURCE.NONE, true);
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if (this.fLocalDisks) this.addDisk("Local Disk", RL11.SOURCE.LOCAL);
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this.addDisk("Remote Disk", RL11.SOURCE.REMOTE);
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if (!this.autoMount()) this.setReady();
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};
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/**
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* getDriveName(iDrive)
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*
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* @this {RL11}
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* @param {number} iDrive
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* @return {string}
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*/
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RL11.prototype.getDriveName = function(iDrive)
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{
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return "RL" + iDrive;
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};
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/**
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* getDriveNumber(sDrive)
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*
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* @this {RL11}
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* @param {string} sDrive
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* @return {number} (0-3, or -1 if error)
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*/
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RL11.prototype.getDriveNumber = function(sDrive)
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{
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var iDrive = -1;
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if (sDrive) {
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iDrive = sDrive.charCodeAt(sDrive.length - 1) - 0x30;
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if (iDrive < 0 || iDrive > 9) iDrive = -1;
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}
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return iDrive;
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};
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/**
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* powerUp(data, fRepower)
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*
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* @this {RL11}
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* @param {Object|null} data
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* @param {boolean} [fRepower]
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* @return {boolean} true if successful, false if failure
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*/
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RL11.prototype.powerUp = function(data, fRepower)
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{
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if (!fRepower) {
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if (!data || !this.restore) {
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this.reset();
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if (this.cmp.fReload) {
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/*
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* If the computer's fReload flag is set, we're required to toss all currently
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* loaded disks and remount all disks specified in the auto-mount configuration.
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*/
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this.unloadAllDrives(true);
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this.autoMount(true);
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}
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} else {
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if (!this.restore(data)) return false;
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}
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/*
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* Populate the HTML controls to match the actual (well, um, specified) number of floppy drives.
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*/
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var controlDrives;
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if ((controlDrives = this.bindings['listDrives'])) {
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while (controlDrives.firstChild) {
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controlDrives.removeChild(controlDrives.firstChild);
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}
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controlDrives.value = "";
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for (var iDrive = 0; iDrive < this.nDrives; iDrive++) {
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var controlOption = document.createElement("option");
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controlOption.value = iDrive;
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controlOption.text = this.getDriveName(iDrive);
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controlDrives.appendChild(controlOption);
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}
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if (this.nDrives > 0) {
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controlDrives.value = "0";
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this.displayDisk(0);
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}
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}
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}
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return true;
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};
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/**
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* powerDown(fSave, fShutdown)
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*
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* @this {RL11}
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* @param {boolean} [fSave]
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* @param {boolean} [fShutdown]
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* @return {Object|boolean} component state if fSave; otherwise, true if successful, false if failure
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*/
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RL11.prototype.powerDown = function(fSave, fShutdown)
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{
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return fSave? this.save() : true;
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};
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/**
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* reset()
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*
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* @this {RL11}
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*/
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RL11.prototype.reset = function()
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{
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this.initController();
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};
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/**
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* save()
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*
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* This implements save support for the RL11 component.
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*
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* @this {RL11}
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* @return {Object}
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*/
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RL11.prototype.save = function()
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{
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var state = new State(this);
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// state.set(0, this.saveController());
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return state.data();
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};
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/**
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* restore(data)
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*
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* This implements restore support for the RL11 component.
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*
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* @this {RL11}
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* @param {Object} data
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* @return {boolean} true if successful, false if failure
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*/
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RL11.prototype.restore = function(data)
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{
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return this.initController(data[0]);
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};
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/**
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* saveController()
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*
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* @this {RL11}
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* @return {Array}
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*/
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RL11.prototype.saveController = function()
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{
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return [];
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};
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/**
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* autoMount(fRemount)
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*
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* @this {RL11}
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* @param {boolean} [fRemount] is true if we're remounting all auto-mounted disks
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* @return {boolean} true if one or more disk images are being auto-mounted, false if none
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*/
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RL11.prototype.autoMount = function(fRemount)
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{
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if (!fRemount) this.cAutoMount = 0;
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if (this.configMount) {
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for (var sDrive in this.configMount) {
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var configDrive = this.configMount[sDrive];
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var sDiskPath = configDrive['path'] || "";
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var sDiskName = configDrive['name'] || this.findDisk(sDiskPath);
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if (sDiskPath && sDiskName) {
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var iDrive = this.getDriveNumber(sDrive);
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if (iDrive >= 0 && iDrive < this.aDrives.length) {
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if (!this.loadDrive(iDrive, sDiskName, sDiskPath, true) && fRemount) {
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this.setReady(false);
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}
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continue;
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}
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}
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this.notice("Incorrect auto-mount settings for drive " + sDrive + " (" + JSON.stringify(configDrive) + ")");
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}
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}
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return !!this.cAutoMount;
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};
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/**
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* loadSelectedDrive(sDiskName, sDiskPath, file)
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*
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* @this {RL11}
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* @param {string} sDiskName
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* @param {string} sDiskPath
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* @param {File} [file] is set if there's an associated File object
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*/
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RL11.prototype.loadSelectedDrive = function(sDiskName, sDiskPath, file)
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{
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var controlDrives = this.bindings["listDrives"];
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var iDrive = controlDrives && str.parseInt(controlDrives.value, 10);
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if (iDrive === undefined || iDrive < 0 || iDrive >= this.aDrives.length) {
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this.notice("Unable to load the selected drive");
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return;
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}
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if (!sDiskPath) {
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this.unloadDrive(iDrive);
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return;
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}
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if (sDiskPath == RL11.SOURCE.LOCAL) {
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this.notice('Use "Choose File" and "Mount" to select and load a local disk.');
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return;
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}
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|
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/*
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* If the special RL11.SOURCE.REMOTE path is selected, then we want to prompt the user for a URL.
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* Oh, and make sure we pass an empty string as the 2nd parameter to prompt(), so that IE won't display
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* "undefined" -- because after all, undefined and "undefined" are EXACTLY the same thing, right?
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*
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* TODO: This is literally all I've done to support remote disk images. There's probably more
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* I should do, like dynamically updating "listDisks" to include new entries, and adding new entries
|
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* to the save/restore data.
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*/
|
|
if (sDiskPath == RL11.SOURCE.REMOTE) {
|
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sDiskPath = window.prompt("Enter the URL of a remote disk image.", "") || "";
|
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if (!sDiskPath) return;
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sDiskName = str.getBaseName(sDiskPath);
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this.status("Attempting to load " + sDiskPath + " as \"" + sDiskName + "\"");
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this.sDiskSource = RL11.SOURCE.REMOTE;
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}
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else {
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this.sDiskSource = sDiskPath;
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}
|
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|
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this.loadDrive(iDrive, sDiskName, sDiskPath, false, file);
|
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};
|
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|
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/**
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|
* loadDrive(iDrive, sDiskName, sDiskPath, fAutoMount, file)
|
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*
|
|
* NOTE: If sDiskPath is already loaded, nothing needs to be done.
|
|
*
|
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* @this {RL11}
|
|
* @param {number} iDrive
|
|
* @param {string} sDiskName
|
|
* @param {string} sDiskPath
|
|
* @param {boolean} [fAutoMount]
|
|
* @param {File} [file] is set if there's an associated File object
|
|
* @return {number} 1 if disk loaded, 0 if queued up (or busy), -1 if already loaded
|
|
*/
|
|
RL11.prototype.loadDrive = function(iDrive, sDiskName, sDiskPath, fAutoMount, file)
|
|
{
|
|
var nResult = -1;
|
|
var drive = this.aDrives[iDrive];
|
|
|
|
if (drive.sDiskPath.toLowerCase() != sDiskPath.toLowerCase()) {
|
|
|
|
nResult++;
|
|
this.unloadDrive(iDrive, true);
|
|
|
|
if (drive.fBusy) {
|
|
this.notice("RL11 busy");
|
|
}
|
|
else {
|
|
// this.status("disk queued: " + sDiskName);
|
|
drive.fBusy = true;
|
|
if (fAutoMount) {
|
|
drive.fAutoMount = true;
|
|
this.cAutoMount++;
|
|
if (this.messageEnabled()) this.printMessage("auto-loading disk: " + sDiskName);
|
|
}
|
|
drive.fLocal = !!file;
|
|
var disk = new DiskPDP11(this, drive, DiskAPI.MODE.PRELOAD);
|
|
if (disk.load(sDiskName, sDiskPath, file, this.finishLoadDrive)) {
|
|
nResult++;
|
|
}
|
|
}
|
|
}
|
|
return nResult;
|
|
};
|
|
|
|
/**
|
|
* finishLoadDrive(drive, disk, sDiskName, sDiskPath, fAutoMount)
|
|
*
|
|
* The disk parameter is set if the disk was successfully loaded, null if not.
|
|
*
|
|
* @this {RL11}
|
|
* @param {Object} drive
|
|
* @param {DiskPDP11} disk
|
|
* @param {string} sDiskName
|
|
* @param {string} sDiskPath
|
|
* @param {boolean} [fAutoMount]
|
|
*/
|
|
RL11.prototype.finishLoadDrive = function onLoadDrive(drive, disk, sDiskName, sDiskPath, fAutoMount)
|
|
{
|
|
var aDiskInfo;
|
|
|
|
drive.fBusy = false;
|
|
|
|
if (disk) {
|
|
/*
|
|
* We shouldn't mount the disk unless we're sure the drive is able to handle it.
|
|
*/
|
|
aDiskInfo = disk.info();
|
|
if (disk && aDiskInfo[0] > drive.nCylinders || aDiskInfo[1] > drive.nHeads /* || aDiskInfo[2] > drive.nSectors */) {
|
|
this.notice("Disk \"" + sDiskName + "\" too large for drive " + this.getDriveName(drive.iDrive));
|
|
disk = null;
|
|
}
|
|
}
|
|
|
|
if (disk) {
|
|
drive.disk = disk;
|
|
drive.sDiskName = sDiskName;
|
|
drive.sDiskPath = sDiskPath;
|
|
|
|
/*
|
|
* Adding local disk image names to the disk list seems like a nice idea, but it's too confusing,
|
|
* because then it looks like the "Mount" button should be able to (re)load them, and that can NEVER
|
|
* happen, for security reasons; local disk images can ONLY be loaded via the "Mount" button after
|
|
* the user has selected them via the "Choose File" button.
|
|
*
|
|
* this.addDisk(sDiskName, sDiskPath);
|
|
*
|
|
* So we're going to take a different approach: when displayDisk() is asked to display the name
|
|
* of a local disk image, it will map all such disks to "Local Disk", and any attempt to "Mount" such
|
|
* a disk, will essentially result in a "Disk not found" error.
|
|
*/
|
|
|
|
// this.addDiskHistory(sDiskName, sDiskPath, disk);
|
|
|
|
/*
|
|
* For a local disk (ie, one loaded via mountDrive()), the disk.restore() performed by addDiskHistory()
|
|
* may have altered the disk geometry, so refresh the disk info.
|
|
*/
|
|
// aDiskInfo = disk.info();
|
|
|
|
/*
|
|
* Clearly, a successful mount implies a disk change, and I suppose that, technically, an *unsuccessful*
|
|
* mount should imply the same, but what would the real-world analog be? Inserting a piece of cardboard
|
|
* instead of an actual disk? In any case, if we can do the user a favor by pretending (as far as the
|
|
* disk change line is concerned) that an unsuccessful mount never happened, let's do it.
|
|
*
|
|
* Successful unmounts are a different story, however; those *do* trigger a change. See unloadDrive().
|
|
*/
|
|
|
|
// this.regInput |= FDC.REG_INPUT.DISK_CHANGE;
|
|
|
|
/*
|
|
* With the addition of notify(), users are now "alerted" whenever a disk has finished loading;
|
|
* notify() is selective about its output, using print() if a print window is open, alert() otherwise.
|
|
*/
|
|
this.notice("Mounted disk \"" + sDiskName + "\" in drive " + this.getDriveName(drive.iDrive), drive.fAutoMount || fAutoMount);
|
|
|
|
/*
|
|
* Since you usually want the Computer to have focus again after loading a new disk, let's try automatically
|
|
* updating the focus after a successful load.
|
|
*/
|
|
if (this.cmp) this.cmp.setFocus();
|
|
}
|
|
else {
|
|
drive.fLocal = false;
|
|
}
|
|
|
|
if (drive.fAutoMount) {
|
|
drive.fAutoMount = false;
|
|
if (!--this.cAutoMount) this.setReady();
|
|
}
|
|
|
|
this.displayDisk(drive.iDrive);
|
|
};
|
|
|
|
/**
|
|
* addDisk(sName, sPath, fTop)
|
|
*
|
|
* @this {RL11}
|
|
* @param {string} sName
|
|
* @param {string} sPath
|
|
* @param {boolean} [fTop] (default is bottom)
|
|
*/
|
|
RL11.prototype.addDisk = function(sName, sPath, fTop)
|
|
{
|
|
var controlDisks = this.bindings["listDisks"];
|
|
if (controlDisks && controlDisks.options) {
|
|
for (var i = 0; i < controlDisks.options.length; i++) {
|
|
if (controlDisks.options[i].value == sPath) return;
|
|
}
|
|
var controlOption = document.createElement("option");
|
|
controlOption.text = sName;
|
|
controlOption.value = sPath;
|
|
if (fTop && controlDisks.childNodes[0]) {
|
|
controlDisks.insertBefore(controlOption, controlDisks.childNodes[0]);
|
|
} else {
|
|
controlDisks.appendChild(controlOption);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* findDisk(sPath)
|
|
*
|
|
* This is used to deal with mount requests (eg, autoMount) that supply a path without a name;
|
|
* if we can find the path in the "listDisks" control, then we return the associated disk name.
|
|
*
|
|
* @this {RL11}
|
|
* @param {string} sPath
|
|
* @return {string|null}
|
|
*/
|
|
RL11.prototype.findDisk = function(sPath)
|
|
{
|
|
var controlDisks = this.bindings["listDisks"];
|
|
if (controlDisks && controlDisks.options) {
|
|
for (var i = 0; i < controlDisks.options.length; i++) {
|
|
var control = controlDisks.options[i];
|
|
if (control.value == sPath) return control.text;
|
|
}
|
|
}
|
|
return str.getBaseName(sPath, true);
|
|
};
|
|
|
|
/**
|
|
* displayDisk(iDrive, fUpdateDrive)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} iDrive (unvalidated)
|
|
* @param {boolean} [fUpdateDrive] is true to update the drive list to match the specified drive (eg, the auto-mount case)
|
|
*/
|
|
RL11.prototype.displayDisk = function(iDrive, fUpdateDrive)
|
|
{
|
|
/*
|
|
* First things first: validate iDrive.
|
|
*/
|
|
if (iDrive >= 0 && iDrive < this.aDrives.length) {
|
|
var drive = this.aDrives[iDrive];
|
|
var controlDisks = this.bindings["listDisks"];
|
|
var controlDrives = this.bindings["listDrives"];
|
|
/*
|
|
* Next, make sure controls for both drives and disks exist.
|
|
*/
|
|
if (controlDisks && controlDrives && controlDisks.options && controlDrives.options) {
|
|
/*
|
|
* Next, make sure the drive whose disk we're updating is the currently selected drive.
|
|
*/
|
|
var i;
|
|
var iDriveSelected = str.parseInt(controlDrives.value, 10);
|
|
var sTargetPath = (drive.fLocal? RL11.SOURCE.LOCAL : drive.sDiskPath);
|
|
if (!isNaN(iDriveSelected) && iDriveSelected == iDrive) {
|
|
for (i = 0; i < controlDisks.options.length; i++) {
|
|
if (controlDisks.options[i].value == sTargetPath) {
|
|
if (controlDisks.selectedIndex != i) {
|
|
controlDisks.selectedIndex = i;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (i == controlDisks.options.length) controlDisks.selectedIndex = 0;
|
|
}
|
|
if (fUpdateDrive) {
|
|
for (i = 0; i < controlDrives.options.length; i++) {
|
|
if (str.parseInt(controlDrives.options[i].value, 10) == drive.iDrive) {
|
|
if (controlDrives.selectedIndex != i) {
|
|
controlDrives.selectedIndex = i;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* unloadDrive(iDrive, fLoading)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} iDrive
|
|
* @param {boolean} [fLoading]
|
|
*/
|
|
RL11.prototype.unloadDrive = function(iDrive, fLoading)
|
|
{
|
|
var drive = this.aDrives[iDrive];
|
|
|
|
if (drive.disk || fLoading === false) {
|
|
|
|
/*
|
|
* Before we toss the disk's information, capture any deltas that may have occurred.
|
|
*/
|
|
// this.updateDiskHistory(drive.sDiskName, drive.sDiskPath, drive.disk);
|
|
|
|
drive.sDiskName = "";
|
|
drive.sDiskPath = "";
|
|
drive.disk = null;
|
|
drive.fLocal = false;
|
|
|
|
// this.regInput |= FDC.REG_INPUT.DISK_CHANGE;
|
|
|
|
if (!fLoading) {
|
|
this.notice("Drive " + this.getDriveName(iDrive) + " unloaded", fLoading);
|
|
this.sDiskSource = RL11.SOURCE.NONE;
|
|
this.displayDisk(iDrive);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* unloadAllDrives(fDiscard)
|
|
*
|
|
* @this {RL11}
|
|
* @param {boolean} fDiscard to discard all disk history before unloading
|
|
*/
|
|
RL11.prototype.unloadAllDrives = function(fDiscard)
|
|
{
|
|
// if (fDiscard) this.aDiskHistory = [];
|
|
|
|
for (var iDrive = 0; iDrive < this.aDrives.length; iDrive++) {
|
|
this.unloadDrive(iDrive, true);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* initController(data)
|
|
*
|
|
* @this {RL11}
|
|
* @param {Array} [data]
|
|
* @return {boolean} true if successful, false if failure
|
|
*/
|
|
RL11.prototype.initController = function(data)
|
|
{
|
|
var i = 0;
|
|
if (!data) data = [];
|
|
this.csr = data[i++] || 0;
|
|
this.bar = data[i++] || 0;
|
|
this.dar = data[i++] || 0;
|
|
this.darInternal = data[i++] || 0;
|
|
this.mpr = data[i++] || 0;
|
|
this.ber = data[i] || 0;
|
|
|
|
var fSuccess = true;
|
|
for (var iDrive = 0; iDrive < this.aDrives.length; iDrive++) {
|
|
var drive = this.aDrives[iDrive];
|
|
if (drive === undefined) {
|
|
drive = this.aDrives[iDrive] = {};
|
|
}
|
|
if (!this.initDrive(drive, iDrive)) {
|
|
fSuccess = false;
|
|
}
|
|
}
|
|
return fSuccess;
|
|
};
|
|
|
|
/**
|
|
* initDrive(drive, iDrive, data)
|
|
*
|
|
* TODO: Consider a separate Drive class that any drive controller can use, since there's a lot of commonality
|
|
* between the drive objects created by disk controllers. This will clean up overall drive management and allow
|
|
* us to factor out some common Drive methods.
|
|
*
|
|
* @this {RL11}
|
|
* @param {Object} drive
|
|
* @param {number} iDrive
|
|
* @param {Array|undefined} [data]
|
|
* @return {boolean} true if successful, false if failure
|
|
*/
|
|
RL11.prototype.initDrive = function(drive, iDrive, data)
|
|
{
|
|
var i = 0;
|
|
var fSuccess = true;
|
|
|
|
drive.iDrive = iDrive;
|
|
drive.fBusy = drive.fLocal = false;
|
|
|
|
drive.name = this.idComponent;
|
|
drive.nCylinders = 512;
|
|
drive.nHeads = 2;
|
|
drive.nSectors = 40;
|
|
drive.cbSector = 256;
|
|
drive.fRemovable = true;
|
|
|
|
/*
|
|
* The next group of properties are set by various controller command sequences.
|
|
*/
|
|
drive.bHead = 0;
|
|
drive.bCylinder = 0;
|
|
drive.bSector = 1;
|
|
drive.bSectorEnd = drive.nSectors; // aka EOT
|
|
drive.nBytes = drive.cbSector;
|
|
|
|
/*
|
|
* The next group of properties are managed by worker functions (eg, doRead()) to maintain state across DMA requests.
|
|
*/
|
|
drive.ibSector = 0;
|
|
drive.sector = null;
|
|
|
|
if (!drive.disk) {
|
|
drive.sDiskPath = ""; // ensure this is initialized to a default that displayDisk() can deal with
|
|
}
|
|
|
|
/*
|
|
* Default drive status bits returned via the controller's Get Status command via the RLMP register
|
|
*/
|
|
drive.status = PDP11.RL11.RLMP.GS_ST.LOCKON | PDP11.RL11.RLMP.GS_BH | PDP11.RL11.RLMP.GS_HO | (drive.nCylinders == 512? PDP11.RL11.RLMP.GS_DT : 0);
|
|
|
|
return fSuccess;
|
|
};
|
|
|
|
/**
|
|
* processCommand()
|
|
*
|
|
* @this {RL11}
|
|
*/
|
|
RL11.prototype.processCommand = function()
|
|
{
|
|
var fnReadWrite;
|
|
var fInterrupt = true;
|
|
var iDrive = (this.csr & PDP11.RL11.RLCS.DS) >> PDP11.RL11.RLCS.SHIFT.DS;
|
|
var drive = this.aDrives[iDrive];
|
|
var iCylinder, iHead, iSector, nWords, addr;
|
|
|
|
/*
|
|
* The typical pattern of DRDY and CRDY:
|
|
*
|
|
* 1) Normally both set
|
|
* 2) CRDY is cleared to process a command
|
|
* 3) DRDY is cleared to command is in process
|
|
*/
|
|
this.csr &= ~PDP11.RL11.RLCS.DRDY;
|
|
|
|
switch(this.csr & PDP11.RL11.RLCS.FUNC) {
|
|
|
|
case PDP11.RL11.FUNC.NOP:
|
|
case PDP11.RL11.FUNC.WCHK:
|
|
case PDP11.RL11.FUNC.RDNC:
|
|
break;
|
|
|
|
case PDP11.RL11.FUNC.STATUS:
|
|
if (this.dar & PDP11.RL11.RLDA.GS_RST) {
|
|
this.csr &= 0x3F; // TODO: Review
|
|
}
|
|
this.mpr = drive.status | (this.darInternal & PDP11.RL11.RLDA.RW_HS); // bit 6: Head Select, bit 7: Drive Type (1=RL02)
|
|
break;
|
|
|
|
case PDP11.RL11.FUNC.SEEK:
|
|
if ((this.dar & PDP11.RL11.RLDA.GS_CMD) == PDP11.RL11.RLDA.SEEK_CMD) {
|
|
var darCA = (this.dar & PDP11.RL11.RLDA.RW_CA);
|
|
var darHS = (this.dar & PDP11.RL11.RLDA.SEEK_HS) << 2;
|
|
if (this.dar & PDP11.RL11.RLDA.SEEK_DIR) {
|
|
this.darInternal += darCA;
|
|
} else {
|
|
this.darInternal -= darCA;
|
|
}
|
|
this.dar = this.darInternal = (this.darInternal & PDP11.RL11.RLDA.RW_CA) | darHS;
|
|
}
|
|
break;
|
|
|
|
case PDP11.RL11.FUNC.RHDR:
|
|
this.mpr = this.darInternal;
|
|
break;
|
|
|
|
case PDP11.RL11.FUNC.RDATA:
|
|
fnReadWrite = this.readData;
|
|
/* falls through */
|
|
|
|
case PDP11.RL11.FUNC.WDATA:
|
|
if (!fnReadWrite) fnReadWrite = this.writeData;
|
|
iCylinder = this.dar >> PDP11.RL11.RLDA.SHIFT.RW_CA;
|
|
iHead = (this.dar & PDP11.RL11.RLDA.RW_HS)? 1 : 0;
|
|
iSector = this.dar & PDP11.RL11.RLDA.RW_SA;
|
|
if (iCylinder >= drive.nCylinders || iSector >= drive.nSectors) {
|
|
this.csr |= PDP11.RL11.ERRC.HNF | PDP11.RL11.RLCS.ERR;
|
|
break;
|
|
}
|
|
addr = (((this.ber & PDP11.RL11.RLBE.MASK)) << 16) | this.bar; // 22 bit mode
|
|
nWords = (0x10000 - this.mpr) & 0xffff;
|
|
fInterrupt = fnReadWrite.call(this, drive, iCylinder, iHead, iSector, nWords, addr, this.endReadWrite.bind(this));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (fInterrupt) {
|
|
this.csr |= PDP11.RL11.RLCS.DRDY | PDP11.RL11.RLCS.CRDY;
|
|
if (this.csr & PDP11.RL11.RLCS.IE) {
|
|
this.cpu.setTrigger(this.triggerInterrupt);
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* endReadWrite(err, iCylinder, iHead, iSector, nWords, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} err
|
|
* @param {number} iCylinder
|
|
* @param {number} iHead
|
|
* @param {number} iSector
|
|
* @param {number} nWords
|
|
* @param {number} addr
|
|
* @return {boolean}
|
|
*/
|
|
RL11.prototype.endReadWrite = function(err, iCylinder, iHead, iSector, nWords, addr)
|
|
{
|
|
this.bar = addr & 0xffff;
|
|
this.csr = (this.csr & ~PDP11.RL11.RLCS.BAE) | ((addr >> (16 - PDP11.RL11.RLCS.SHIFT.BAE)) & PDP11.RL11.RLCS.BAE);
|
|
this.ber = (addr >> 16) & PDP11.RL11.RLBE.MASK; // 22 bit mode
|
|
this.dar = (iCylinder << PDP11.RL11.RLDA.SHIFT.RW_CA) | (iHead? PDP11.RL11.RLDA.RW_HS : 0) | (iSector & PDP11.RL11.RLDA.RW_SA);
|
|
this.darInternal = this.dar;
|
|
this.mpr = (0x10000 - nWords) & 0xffff;
|
|
if (err) {
|
|
this.csr |= err | PDP11.RL11.RLCS.ERR;
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* readData(drive, iCylinder, iHead, iSector, nWords, addr, done)
|
|
*
|
|
* @this {RL11}
|
|
* @param {Object} drive
|
|
* @param {number} iCylinder
|
|
* @param {number} iHead
|
|
* @param {number} iSector
|
|
* @param {number} nWords
|
|
* @param {number} addr
|
|
* @param {function(...)} done
|
|
* @return {boolean} true if complete, false if queued
|
|
*/
|
|
RL11.prototype.readData = function(drive, iCylinder, iHead, iSector, nWords, addr, done)
|
|
{
|
|
var err = 0;
|
|
var disk = drive.disk;
|
|
var sector = null, ibSector;
|
|
|
|
if (!disk) {
|
|
err = PDP11.RL11.ERRC.HNF; // TODO: Review
|
|
nWords = 0;
|
|
}
|
|
|
|
while (nWords--) {
|
|
if (!sector) {
|
|
sector = drive.disk.seek(iCylinder, iHead, iSector + 1);
|
|
if (!sector) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
ibSector = 0;
|
|
}
|
|
var b0, b1;
|
|
if ((b0 = drive.disk.read(sector, ibSector++)) < 0 || (b1 = drive.disk.read(sector, ibSector++)) < 0) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
var data = this.bus.setWordDirect(addr, b0 | (b1 << 8));
|
|
if (this.bus.checkFault()) {
|
|
err = PDP11.RL11.ERRC.NXM;
|
|
break;
|
|
}
|
|
addr += 2;
|
|
if (ibSector >= disk.cbSector) {
|
|
sector = null;
|
|
if (++iSector >= disk.nSectors) {
|
|
iSector = 0;
|
|
if (++iHead >= disk.nHeads) {
|
|
iHead = 0;
|
|
if (++iCylinder >= disk.nCylinders) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return done(err, iCylinder, iHead, iSector, nWords, addr);
|
|
};
|
|
|
|
/**
|
|
* writeData(drive, iCylinder, iHead, iSector, nWords, addr, done)
|
|
*
|
|
* @this {RL11}
|
|
* @param {Object} drive
|
|
* @param {number} iCylinder
|
|
* @param {number} iHead
|
|
* @param {number} iSector
|
|
* @param {number} nWords
|
|
* @param {number} addr
|
|
* @param {function(...)} done
|
|
* @return {boolean} true if complete, false if queued
|
|
*/
|
|
RL11.prototype.writeData = function(drive, iCylinder, iHead, iSector, nWords, addr, done)
|
|
{
|
|
var err = 0;
|
|
var disk = drive.disk;
|
|
var sector = null, ibSector;
|
|
|
|
if (!disk) {
|
|
err = PDP11.RL11.ERRC.HNF; // TODO: Review
|
|
nWords = 0;
|
|
}
|
|
|
|
while (nWords--) {
|
|
var data = this.bus.getWordDirect(addr);
|
|
if (this.bus.checkFault()) {
|
|
err = PDP11.RL11.ERRC.NXM;
|
|
break;
|
|
}
|
|
addr += 2;
|
|
if (!sector) {
|
|
sector = drive.disk.seek(iCylinder, iHead, iSector + 1, true);
|
|
if (!sector) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
ibSector = 0;
|
|
}
|
|
if (!drive.disk.write(sector, ibSector++, data & 0xff) || !drive.disk.write(sector, ibSector++, data >> 8)) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
if (ibSector >= disk.cbSector) {
|
|
sector = null;
|
|
if (++iSector >= disk.nSectors) {
|
|
iSector = 0;
|
|
if (++iHead >= disk.nHeads) {
|
|
iHead = 0;
|
|
if (++iCylinder >= disk.nCylinders) {
|
|
err = PDP11.RL11.ERRC.HNF;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return done(err, iCylinder, iHead, iSector, nWords, addr);
|
|
};
|
|
|
|
/**
|
|
* readRLCS(addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLCS or 174400)
|
|
* @return {number}
|
|
*/
|
|
RL11.prototype.readRLCS = function(addr)
|
|
{
|
|
return this.csr & PDP11.RL11.RLCS.RMASK;
|
|
};
|
|
|
|
/**
|
|
* writeRLCS(data, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} data
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLCS or 174400)
|
|
*/
|
|
RL11.prototype.writeRLCS = function(data, addr)
|
|
{
|
|
this.csr = (this.csr & ~PDP11.RL11.RLCS.WMASK) | (data & PDP11.RL11.RLCS.WMASK);
|
|
|
|
this.bae = (this.bae & ~0x3) | ((data & PDP11.RL11.RLCS.BAE) >> 4);
|
|
|
|
if (!(this.csr & PDP11.RL11.RLCS.CRDY)) this.processCommand();
|
|
};
|
|
|
|
/**
|
|
* readRLBA(addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLBA or 174402)
|
|
* @return {number}
|
|
*/
|
|
RL11.prototype.readRLBA = function(addr)
|
|
{
|
|
return this.bar;
|
|
};
|
|
|
|
/**
|
|
* writeRLBA(data, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} data
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLBA or 174402)
|
|
*/
|
|
RL11.prototype.writeRLBA = function(data, addr)
|
|
{
|
|
this.bar = data & PDP11.RL11.RLBA.WMASK;
|
|
};
|
|
|
|
/**
|
|
* readRLDA(addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLDA or 174404)
|
|
* @return {number}
|
|
*/
|
|
RL11.prototype.readRLDA = function(addr)
|
|
{
|
|
return this.dar;
|
|
};
|
|
|
|
/**
|
|
* writeRLDA(data, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} data
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLDA or 174404)
|
|
*/
|
|
RL11.prototype.writeRLDA = function(data, addr)
|
|
{
|
|
this.dar = data;
|
|
};
|
|
|
|
/**
|
|
* readRLMP(addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLMP or 174406)
|
|
* @return {number}
|
|
*/
|
|
RL11.prototype.readRLMP = function(addr)
|
|
{
|
|
return this.mpr;
|
|
};
|
|
|
|
/**
|
|
* writeRLMP(data, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} data
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLMP or 174406)
|
|
*/
|
|
RL11.prototype.writeRLMP = function(data, addr)
|
|
{
|
|
this.mpr = data;
|
|
};
|
|
|
|
/**
|
|
* readRLBE(addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLBE or 174410)
|
|
* @return {number}
|
|
*/
|
|
RL11.prototype.readRLBE = function(addr)
|
|
{
|
|
return this.ber;
|
|
};
|
|
|
|
/**
|
|
* writeRLBE(data, addr)
|
|
*
|
|
* @this {RL11}
|
|
* @param {number} data
|
|
* @param {number} addr (eg, PDP11.UNIBUS.RLBE or 174410)
|
|
*/
|
|
RL11.prototype.writeRLBE = function(data, addr)
|
|
{
|
|
this.ber = data & PDP11.RL11.RLBE.MASK;
|
|
};
|
|
|
|
/*
|
|
* ES6 ALERT: As you can see below, I've finally started using computed property names.
|
|
*/
|
|
RL11.UNIBUS_IOTABLE = {
|
|
[PDP11.UNIBUS.RLCS]: /* 174400 */ [null, null, RL11.prototype.readRLCS, RL11.prototype.writeRLCS, "RLCS"],
|
|
[PDP11.UNIBUS.RLBA]: /* 174402 */ [null, null, RL11.prototype.readRLBA, RL11.prototype.writeRLBA, "RLBA"],
|
|
[PDP11.UNIBUS.RLDA]: /* 174404 */ [null, null, RL11.prototype.readRLDA, RL11.prototype.writeRLDA, "RLDA"],
|
|
[PDP11.UNIBUS.RLMP]: /* 174406 */ [null, null, RL11.prototype.readRLMP, RL11.prototype.writeRLMP, "RLMP"],
|
|
[PDP11.UNIBUS.RLBE]: /* 174410 */ [null, null, RL11.prototype.readRLBE, RL11.prototype.writeRLBE, "RLBE"]
|
|
};
|
|
|
|
if (NODE) module.exports = RL11;
|