Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added some new ways of dumping the Video frame buffer (EGA/VGA-centric)

Browse source
This commit is contained in:
Jeff Parsons 2015-08-16 14:00:33 -07:00
commit 04b2b4840c
1 changed files with 51 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

57
modules/pcjs/lib/video.js
View file

@ -2486,7 +2486,27 @@ Card.prototype.dumpCard = function()
};
/**
* dumpBuffer()
* dumpBuffer(sParm)
*
* Rather than requiring sParm to ALWAYS be a frame buffer address OR a frame buffer offset,
* we'll just make a guess as to what the user intended and support BOTH; basically if the value
* is less than the frame buffer address, we'll assume it's an offset.
*
* Also, we allow some special options to be encoded in sParm: if it contains 'w' followed by a
* a number (1-8), then we print only that number of memory locations per row, and then adjust
* the starting address of the next row by the width of the screen, so that the dump reflects a
* rectangular chunk of the video buffer. And, if sParm contains 'p' followed by a number (0-3),
* when we display only the bits from that plane for each memory location, in binary instead of hex.
*
* For example, assuming a VGA frame buffer with 640x480 pixels spread across 38400 (0x9600) memory
* locations, the following 3 commands will dump a vertical swath of bits from plane 0 that is 24
* rows tall and 8 columns wide, from roughly the center of the screen (0x4B00 + 0x28).
*
* d video 4b28w8p0
* d video w8p0
* d video w8p0
*
* TODO: Make these options more general-purpose (it currently assumes a standard VGA planar layout).
*
* @this {Card}
* @param {string} sParm
@ -2498,16 +2518,41 @@ Card.prototype.dumpBuffer = function(sParm)
this.dbg.println("no buffer");
return;
}
var idw = str.parseInt(sParm);
idw = (idw !== undefined? idw - this.addrBuffer : (this.prevDump || 0));
if (idw < 0) idw = 0;
var fColAdjust = false;
var i, idw, w = 8, p = -1;
var a = sParm.split(/([wp])/);
for (i = 0; i < a.length; i++) {
if (!i) {
if (a[0].length) {
idw = str.parseInt(a[0]);
}
} else {
var j = str.parseInt(a[i+1]);
if (a[i] == 'w') {
if (j >= 1 && j <= 8) {
w = j;
fColAdjust = true;
}
} else {
if (j >= 0 && j <= 3) p = j;
}
i++;
}
}
if (idw === undefined) {
idw = this.prevDump || 0;
} else if (idw >= this.addrBuffer) {
idw -= this.addrBuffer;
}
var cLines = 8, sDump = "";
for (var iLine = 0; iLine < cLines; iLine++) {
var sData = str.toHex(this.addrBuffer + idw) + ":";
for (var i = 0; i < 8 && idw < this.adwMemory.length; i++) {
for (i = 0; i < w && idw < this.adwMemory.length; i++) {
var dw = this.adwMemory[idw++];
sData += " " + str.toHex(dw);
sData += ' ' + ((p < 0)? str.toHex(dw) : str.toBin((dw >> (p << 3)), 8));
}
if (fColAdjust) idw += (this.video.nCols >> 3) - w;
if (sDump) sDump += "\n";
sDump += sData;
}