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VT100 SET-UP screen is accessible now

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This commit is contained in:
Jeff Parsons 2016-08-14 10:52:24 -07:00
commit e7324a5c6a
10 changed files with 5989 additions and 5856 deletions
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65
modules/pc8080/lib/video.js
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@ -320,7 +320,10 @@ Video.prototype.initBuffers = function()
* for each font and draw characters by drawing from the font canvas to the target canvas.
*/
if (this.cxCell > 1) {
this.initCellCache(this.nColsBuffer * this.nRowsBuffer);
/*
* We add an extra column per row to store the visible line length at the start of every row.
*/
this.initCellCache((this.nColsBuffer + 1) * this.nRowsBuffer);
} else {
this.imageBuffer = this.contextScreen.createImageData(cxBuffer, cyBuffer);
this.nPixelsPerCell = (16 / this.nBitsPerPixel)|0;
@ -959,11 +962,12 @@ Video.prototype.updateChar = function(idFont, col, row, data, context)
};
/**
* updateVT100()
* updateVT100(fForced)
*
* @this {Video}
* @param {boolean} [fForced]
*/
Video.prototype.updateVT100 = function()
Video.prototype.updateVT100 = function(fForced)
{
var addrNext = this.addrBuffer, fontNext = -1;
@ -979,6 +983,8 @@ Video.prototype.updateVT100 = function()
var nCols = 0;
var addr = addrNext;
var font = fontNext;
var nColsVisible = this.nColsBuffer;
if (font != Video.VT100.FONT.NORML) nColsVisible >>= 1;
while (true) {
var data = this.bus.getByteDirect(addr++);
if ((data & Video.VT100.LINETERM) == Video.VT100.LINETERM) {
@ -988,7 +994,7 @@ Video.prototype.updateVT100 = function()
addrNext += (b & Video.VT100.LINEATTR.ADDRBIAS)? Video.VT100.ADDRBIAS_LO : Video.VT100.ADDRBIAS_HI;
break;
}
if (nCols < this.abLineBuffer.length) {
if (nCols < nColsVisible) {
this.abLineBuffer[nCols++] = data;
} else {
break; // ideally, we would wait for a LINETERM byte, but it's not safe to loop without limit
@ -1011,13 +1017,21 @@ Video.prototype.updateVT100 = function()
}
/*
* Display the line buffer; ordinarily, the font number would always be valid after processing the "fill lines",
* but if the buffer isn't initialized yet, the usual LINETERM might be missing, so the font number might not be set.
* Display the line buffer; ordinarily, the font number would be valid after processing the "fill lines",
* but if the buffer isn't initialized yet, those lines might be missing, so the font number might not be set.
*/
if (font >= 0) {
/*
* Cell cache logic is complicated by the fact that a line may be single-width one frame and double-width
* the next. So we store the visible line length at the start of each row in the cache, which must match if
* the cache is considered valid for the current line.
*/
var fLineCacheValid = this.fCellCacheValid && (this.aCellCache[iCell] == nColsVisible);
this.aCellCache[iCell++] = nColsVisible;
for (var iCol = 0; iCol < nCols; iCol++) {
data = this.abLineBuffer[iCol];
if (!this.fCellCacheValid || data !== this.aCellCache[iCell]) {
if (!fLineCacheValid || data !== this.aCellCache[iCell]) {
this.aCellCache[iCell] = data;
this.updateChar(font, iCol, nRows, data, this.contextBuffer);
cUpdated++;
}
@ -1027,6 +1041,18 @@ Video.prototype.updateVT100 = function()
nRows++;
}
this.assert(font < 0 || iCell === this.nCellCache);
if (MAXDEBUG && !fForced) {
var nSeconds = Date.now() / 1000;
if ((nSeconds|0) != (this.nUpdateSeconds|0)) {
this.nUpdateNumber = 0;
}
this.nUpdateNumber++;
this.nUpdateSeconds = nSeconds;
this.printMessage("updateVT100(): update #" + this.nUpdateNumber + " at " +this.nUpdateSeconds + " corner=" + str.toHexByte(this.aCellCache[1]) + " cycles=" + this.nCyclesPrev + " delta=" + this.nCyclesDelta);
}
this.fCellCacheValid = true;
if (cUpdated && this.contextBuffer) {
@ -1056,9 +1082,10 @@ Video.prototype.updateScreen = function(n)
{
var fClean;
var fUpdate = true;
var fForced = true;
if (n >= 0) {
fForced = false;
if (this.rateInterrupt) {
/*
* TODO: Incorporate these hard-coded interrupt vector numbers into configuration blocks.
@ -1093,11 +1120,11 @@ Video.prototype.updateScreen = function(n)
}
}
if (DEBUG) {
if (DEBUG && !fForced) {
var nCycles = this.cpu.getCycles();
var nCyclesDelta = nCycles - this.nCyclesPrev;
this.nCyclesDelta = nCycles - this.nCyclesPrev;
this.nCyclesPrev = nCycles;
this.printMessage("updateScreen(" + n + "): clean=" + fClean + ", update=" + fUpdate + ", cycles=" + nCycles + ", delta=" + nCyclesDelta);
if (MAXDEBUG) this.printMessage("updateScreen(" + n + "): clean=" + fClean + ", update=" + fUpdate + ", cycles=" + this.nCyclesPrev + ", delta=" + this.nCyclesDelta);
}
if (!fUpdate) {
@ -1105,32 +1132,34 @@ Video.prototype.updateScreen = function(n)
}
if (this.cxCell > 1) {
this.updateScreenText();
this.updateScreenText(fForced);
} else {
this.updateScreenGraphics();
this.updateScreenGraphics(fForced);
}
};
/**
* updateScreenText()
* updateScreenText(fForced)
*
* @this {Video}
* @param {boolean} [fForced]
*/
Video.prototype.updateScreenText = function()
Video.prototype.updateScreenText = function(fForced)
{
switch(this.nFormat) {
case Video.FORMAT.VT100:
this.updateVT100();
this.updateVT100(fForced);
break;
}
};
/**
* updateScreenGraphics()
* updateScreenGraphics(fForced)
*
* @this {Video}
* @param {boolean} [fForced]
*/
Video.prototype.updateScreenGraphics = function()
Video.prototype.updateScreenGraphics = function(fForced)
{
var addr = this.addrBuffer;
var addrLimit = addr + this.sizeBuffer;