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Added 'diagnostics' (0, 1, or 2) and 'randomize' (0 or 1) PCx86 machine parameters to control diagnostic message display/prompting and video screen randomization, respectively

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This commit is contained in:
Jeff Parsons 2017-08-09 11:42:38 -07:00 • committed by Jeff Parsons
commit aac9a13328
7 changed files with 1072 additions and 1023 deletions
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27
modules/pcx86/lib/video.js
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@ -44,6 +44,7 @@ if (NODE) {
/*
* MDA/CGA Support
* ---------------
*
* Since there's a lot of similarity between the MDA and CGA (eg, their text-mode video buffer
* format, and their use of the 6845 CRT controller), since the MDA ROM contains the fonts used
@ -81,10 +82,9 @@ if (NODE) {
* TODO: Whenever there are borders, they should be filled with the CGA's overscan colors. However,
* in the case of graphics modes (and text modes whenever font scaling is enabled), we don't reserve
* any space for borders, so if borders are important, explicit border support will be required.
*/
/*
*
* EGA Support
* -----------
*
* EGA support piggy-backs on the existing MDA/CGA support. All the existing MDA/CGA port handlers
* now refer to either cardMono or cardColor (instead of directly to cardMDA or cardCGA), enabling
@ -103,10 +103,9 @@ if (NODE) {
* control certain assumptions about the virtual display's capabilities (ie, Color Display vs. Enhanced
* Color Display). P3 can switch all the I/O ports from 0x3nn to 0x2nn; the default is 0x3nn, and
* that's the only port range the EGA ROM supports as well.
*/
/*
*
* VGA Support
* -----------
*
* More will be said here about PCjs VGA support later. But first, a word from IBM: "Video Graphics Array [VGA]
* Programming Considerations":
@ -2166,6 +2165,7 @@ class Video extends Component {
* fontROM: path to .rom file (or a JSON representation) containing the character set
* touchScreen: string specifying desired touch-screen support (default is none)
* autoLock: true to (attempt to) auto-lock the mouse to the canvas (default is false)
* randomize: 1 enables screen randomization, 0 disables (default is 1)
*
* An EGA/VGA may specify the following additional properties:
*
@ -2220,6 +2220,8 @@ class Video extends Component {
this.nCard = aModelDefaults[0];
this.cbMemory = parmsVideo['memory'] || 0; // zero means fallback to the cardSpec's default size
this.sSwitches = parmsVideo['switches'];
this.nRandomize = parmsVideo['randomize'];
if (this.nRandomize == null) this.nRandomize = 1;
/*
* powerUp() uses the default mode ONLY if ChipSet doesn't give us a default.
@ -2418,6 +2420,9 @@ class Video extends Component {
this.cpu = cpu;
this.dbg = dbg;
var nRandomize = +cmp.getMachineParm('randomize');
if (nRandomize >= 0 && nRandomize <= 1) this.nRandomize = nRandomize;
/*
* nCard will be undefined if no model was explicitly set (whereas this.nCard is ALWAYS defined).
*/
@ -2588,15 +2593,15 @@ class Video extends Component {
}
/**
* getInput()
* getScreen()
*
* This is an interface used by the Mouse component, so that it can invoke capture/release mouse events from the screen element.
* This is an interface used by the Mouse component, so that it can capture mouse events from the screen.
*
* @this {Video}
* @param {Mouse} [mouse]
* @return {Object|undefined}
*/
getInput(mouse)
getScreen(mouse)
{
this.mouse = mouse;
return this.inputScreen;
@ -3127,7 +3132,6 @@ class Video extends Component {
*/
reset()
{
var fRandomize = true;
var nMonitorType = ChipSet.MONITOR.NONE;
/*
@ -3176,7 +3180,6 @@ class Video extends Component {
if (this.nMonitorType !== nMonitorType) {
this.nMonitorType = nMonitorType;
fRandomize = true;
}
this.cardActive = null;
@ -3199,7 +3202,7 @@ class Video extends Component {
this.nMode = null;
this.setMode(this.nModeDefault);
if (this.cardActive.addrBuffer && fRandomize) {
if (this.cardActive.addrBuffer && this.nRandomize) {
/*
* On the initial power-on, we initialize the video buffer to random characters, as a way of testing
* whether our font(s) were successfully loaded. It's assumed that our default display mode is a text mode,