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Initial v1.18.2 delta: added support for ROM notification parameters that the Video component will accept

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Jeff Parsons 2015-05-22 12:33:33 -07:00 • committed by jeffpar
commit 0639e8cbd2
151 changed files with 8239 additions and 1383 deletions
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51
modules/pcjs/lib/video.js
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@ -2779,32 +2779,16 @@ Video.prototype.onLoadSetFonts = function(sFontFile, sFontData, nErrorCode)
};
/**
* onROMLoad(abRom)
* onROMLoad(abRom, aParms)
*
* Called by copyROM() whenever a ROM with a 'notify' attribute set to our component ID has been loaded.
*
* For IBM EGA cards, we assume the associated ROM is the original IBM EGA ROM, which stores its 8x14
* font data at 0x2230 (and unlike the MDA/CGA character generator ROM, which splits the first 8 rows and
* remaining 6 rows of each character across separate 2K chunks, the bytes for all the EGA character rows
* are contiguous); the total size of the 8x14 font is 0xE00 bytes.
*
* At 0x3030, there is an "ALPHA SUPPLEMENT" table, which contains 15 bytes per row instead of 14,
* because each row is preceded by one byte containing the corresponding ASCII code; there are 20 entries
* in the supplemental table, for a total size of 0x12C bytes.
*
* Finally, at 0x3160, we have the 8x8 font data (also known as the thicker "double dot" CGA font);
* the total size of the 8x8 font is 0x800 bytes. No other font data is present in the EGA ROM;
* the thin 5x7 "single dot" CGA font is notably absent, which is fine, because we never loaded it for
* the MDA/CGA either.
*
* TODO: Determine how the supplemental table is used and whether we need to add some "run-time"
* font generation to support it (as opposed to "init-time" generation, which is all we do now).
* There's probably a similar need for user-defined fonts; for now, they're simply not supported.
* Called by the ROM's copyROM() function whenever a ROM component with a 'notify' attribute containing
* our component ID has been loaded.
*
* @this {Video}
* @param {Array.<number>} abROM
* @param {Array.<number>} [aParms]
*/
Video.prototype.onROMLoad = function(abROM)
Video.prototype.onROMLoad = function(abROM, aParms)
{
if (this.nCard == Video.CARD.EGA) {
/*
@ -2812,16 +2796,35 @@ Video.prototype.onROMLoad = function(abROM)
* regenerate the color font(s) whenever the foreground and/or background colors have changed.
*/
if (DEBUG) this.printMessage("onROMLoad(): EGA fonts loaded");
this.setFontData(abROM, [0x2230, 0x3160], 8);
/*
* For EGA cards, in the absence of any parameters, we assume that we're receiving the original
* IBM EGA ROM, which stores its 8x14 font data at 0x2230 as a contiguous stream; the total size
* of the 8x14 font is 0xE00 bytes.
*
* At 0x3030, there is an "ALPHA SUPPLEMENT" table, which contains 15 bytes per row instead of 14,
* because each row is preceded by one byte containing the corresponding ASCII code; there are 20
* entries in the supplemental table, for a total size of 0x12C bytes.
*
* Finally, at 0x3160, we have the 8x8 font data (also known as the thicker "double dot" CGA font);
* the total size of the 8x8 font is 0x800 bytes. No other font data is present in the EGA ROM;
* the thin 5x7 "single dot" CGA font is notably absent, which is fine, because we never loaded it for
* the MDA/CGA either.
*
* TODO: Determine how the supplemental table is used and whether we need to add some "run-time"
* font generation to support it (as opposed to "init-time" generation, which is all we do now).
* There's probably a similar need for user-defined fonts; for now, they're simply not supported.
*/
this.setFontData(abROM, aParms || [0x2230, 0x3160], 8);
}
else if (this.nCard == Video.CARD.VGA) {
if (DEBUG) this.printMessage("onROMLoad(): VGA fonts loaded");
/*
* The IBM VGA contains an 8x14 font at 0x3F8D (and corresponding supplemental table at 0x4D8D)
* For VGA cards, in the absence of any parameters, we assume that we're receiving the original
* IBM VGA ROM, which contains an 8x14 font at 0x3F8D (and corresponding supplemental table at 0x4D8D)
* and an 8x8 font at 0x378D; however, it also contains an 8x16 font at 0x4EBA (and corresponding
* supplemental table at 0x5EBA). See our reconstructed source code in ibm-vga.nasm.
*/
this.setFontData(abROM, [0x3f8d, 0x378d], 8);
this.setFontData(abROM, aParms || [0x3f8d, 0x378d], 8);
}
this.setReady();
};