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Fixed conditions required for RSTS/E boot code to work

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This commit is contained in:
Jeff Parsons 2016-12-03 16:12:25 -08:00 • committed by Jeff Parsons
commit 2b8ea8ddee
4 changed files with 37 additions and 17 deletions
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18
modules/pdp11/lib/rk11.js
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@ -133,7 +133,7 @@ RK11.prototype.setBinding = function(sType, sBinding, control, sValue)
control.onchange = function onChangeListDisks(event) {
var controlDesc = rk11.bindings["descDisk"];
var controlOption = control.options[control.selectedIndex];
var controlOption = control.options && control.options[control.selectedIndex];
if (controlDesc && controlOption) {
var dataValue = {};
var sValue = controlOption.getAttribute("data-value");
@ -172,7 +172,7 @@ RK11.prototype.setBinding = function(sType, sBinding, control, sValue)
control.onclick = function onClickLoadDrive(event) {
var controlDisks = rk11.bindings["listDisks"];
if (controlDisks) {
if (controlDisks && controlDisks.options) {
var sDiskName = controlDisks.options[controlDisks.selectedIndex].text;
var sDiskPath = controlDisks.value;
rk11.loadSelectedDrive(sDiskName, sDiskPath);
@ -561,15 +561,21 @@ RK11.prototype.bootSelectedDisk = function()
return;
}
if (!drive.disk) {
this.notice("No disk loaded in the selected drive");
this.notice("Load a disk into the drive first");
return;
}
var err = this.readData(drive, 0, 0, 0, drive.cbSector >> 1, 0);
/*
* NOTE: We're calling setReset() BEFORE reading the boot code in order to eliminate any side-effects
* of the previous state of either the controller OR the CPU; for example, we don't want any previous MMU
* or UNIBUS Map registers affecting the simulated readData() call. Also, some boot code (eg, RSTS/E)
* expects the controller to be in a READY state; since setReset() triggers a call to our reset() handler,
* a READY state is assured, and the readData() call shouldn't do anything to change that.
*/
this.cpu.setReset(0, true);
var err = this.readData(drive, 0, 0, 0, 512, 0);
if (err) {
this.notice("Unable to read the boot sector (" + err + ")");
return;
}
this.cpu.setReset(0, true);
};
/**