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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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6
modules/pcjs/lib/bus.js
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@ -1370,7 +1370,10 @@ Bus.prototype.checkPortInputNotify = function(port, addrLIP)
if (aNotify !== undefined) {
if (aNotify[1]) {
var b = aNotify[1].call(aNotify[0], port, addrLIP);
if (b !== undefined) bIn = b;
if (b !== undefined) {
this.assert(!(b & ~0xff));
bIn = b;
}
}
if (DEBUGGER && this.dbg && this.fPortInputBreakAll != aNotify[2]) {
this.dbg.checkPortInput(port, bIn);
@ -1482,6 +1485,7 @@ Bus.prototype.checkPortOutputNotify = function(port, bOut, addrLIP)
var aNotify = this.aPortOutputNotify[port];
if (aNotify !== undefined) {
if (aNotify[1]) {
this.assert(!(bOut & ~0xff));
aNotify[1].call(aNotify[0], port, bOut, addrLIP);
}
if (DEBUGGER && this.dbg && this.fPortOutputBreakAll != aNotify[2]) {