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Ensure all 8-bit I/O restricts itself to 8 bits (fixes video glitches in Win95 Setup)

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This commit is contained in:
Jeff Parsons 2015-08-17 10:51:50 -07:00
commit e39550f835
5 changed files with 53 additions and 31 deletions
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3
modules/pcjs/lib/fdc.js
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@ -1890,7 +1890,7 @@ FDC.prototype.doCmd = function()
n = 0;
drive.resCode = FDC.REG_DATA.RES.NONE;
if (drive.disk && (drive.sector = drive.disk.seek(drive.bCylinder, drive.bHead, drive.bSector))) {
n = drive.sector.length;
n = (drive.sector.length >> 8);
} else {
/*
* TODO: Determine the appropriate response code(s) for the possible errors that can occur here.
@ -2089,6 +2089,7 @@ FDC.prototype.pushResult = function(bResult, name)
if (DEBUG && this.messageEnabled(Messages.PORT | Messages.FDC)) {
this.printMessage("FDC.RES[" + (name || this.regDataTotal) + "]: " + str.toHexByte(bResult), true);
}
this.assert(!(bResult & ~0xff));
this.regDataArray[this.regDataTotal++] = bResult;
};