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Added the ability to install external ROMs (eg, M9312 ROM images) into the IOPAGE

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This commit is contained in:
Jeff 2016-11-05 12:01:56 -07:00 • committed by Jeff Parsons
commit c67176eab0
25 changed files with 1143 additions and 346 deletions
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71
modules/pdp11/lib/rom.js
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@ -33,12 +33,14 @@
"use strict";
if (NODE) {
var str = require("../../shared/lib/strlib");
var web = require("../../shared/lib/weblib");
var DumpAPI = require("../../shared/lib/dumpapi");
var Component = require("../../shared/lib/component");
var PDP11 = require("./defines");
var MemoryPDP11 = require("./memory");
var str = require("../../shared/lib/strlib");
var web = require("../../shared/lib/weblib");
var DumpAPI = require("../../shared/lib/dumpapi");
var Component = require("../../shared/lib/component");
var PDP11 = require("./defines");
var BusPDP11 = require("./bus");
var MemoryPDP11 = require("./memory");
var MessagesPDP11 = require("./messages");
}
/**
@ -51,11 +53,11 @@ if (NODE) {
* alias: physical alias address (null if none)
* file: name of ROM data file
*
* NOTE: The ROM data will not be copied into place until the Bus is ready (see initBus()) AND the
* ROM data file has finished loading (see doneLoad()).
* NOTE: The ROM data will not be copied into place until the Bus is ready (see initBus()) AND
* the ROM data file has finished loading (see doneLoad()).
*
* Also, while the size parameter may seem redundant, I consider it useful to confirm that the ROM you received
* is the ROM you expected.
* Also, while the size parameter may seem redundant, I consider it useful to confirm that the ROM
* you received is the ROM you expected.
*
* @constructor
* @extends Component
@ -70,6 +72,7 @@ function ROMPDP11(parmsROM)
this.addrROM = parmsROM['addr'];
this.sizeROM = parmsROM['size'];
this.fRetainROM = false;
/*
* The new 'alias' property can now be EITHER a single physical address (like 'addr') OR an array of
@ -260,7 +263,9 @@ ROMPDP11.prototype.initROM = function()
* whether they're ROM or RAM. However, the only way to modify a machine's ROM is with the Debugger,
* and Debugger users should know better.
*/
delete this.abInit;
if (!this.fRetainROM) {
delete this.abInit;
}
}
}
this.setReady();
@ -276,7 +281,24 @@ ROMPDP11.prototype.initROM = function()
*/
ROMPDP11.prototype.addROM = function(addr)
{
if (this.bus.addMemory(addr, this.sizeROM, MemoryPDP11.TYPE.ROM)) {
this.status(this.sizeROM + "-byte ROM at " + str.toOct(addr));
if (addr >= BusPDP11.IOPAGE_16BIT && addr < BusPDP11.IOPAGE_16BIT + BusPDP11.IOPAGE_LENGTH) {
/*
* This code has been added as a work-around to effectively allow us to install small ROMs into portions
* of the IOPAGE address space, by installing I/O handlers for the entire range that return the corresponding
* bytes of the current ROM image on reads, and ignore any writes (which I'm only assuming is how a typical
* ROM "device" deals with writes; if we remove the write handler, then writes will cause a fault).
*/
var IOTable = {
[addr]: [ROMPDP11.prototype.readROMByte, ROMPDP11.prototype.writeROMByte, null, null, null, this.sizeROM >> 1]
};
if (this.bus.addIOTable(this, IOTable, MessagesPDP11.ROM, this.idComponent)) {
this.fRetainROM = true;
return true;
}
}
else if (this.bus.addMemory(addr, this.sizeROM, MemoryPDP11.TYPE.ROM)) {
if (DEBUG) this.log("addROM(): copying ROM to " + str.toHexLong(addr) + " (" + str.toHexLong(this.abInit.length) + " bytes)");
var i;
for (i = 0; i < this.abInit.length; i++) {
@ -284,6 +306,7 @@ ROMPDP11.prototype.addROM = function(addr)
}
return true;
}
/*
* We don't need to report an error here, because addMemory() already takes care of that.
*/
@ -309,6 +332,30 @@ ROMPDP11.prototype.cloneROM = function(addr)
this.bus.setMemoryBlocks(addr, this.sizeROM, aBlocks);
};
/**
* readROMByte(addr)
*
* @this {ROMPDP11}
* @param {number} addr
* @return {number}
*/
ROMPDP11.prototype.readROMByte = function(addr)
{
var i = (addr - this.addrROM);
return this.abInit[i];
};
/**
* writeROMByte(data, addr)
*
* @this {ROMPDP11}
* @param {number} data
* @param {number} addr
*/
ROMPDP11.prototype.writeROMByte = function(data, addr)
{
};
/**
* ROMPDP11.init()
*