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Cleaned up the run loop, less complicated now, and video updates can drive themselves thanks to the new CPU timer functions

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This commit is contained in:
Jeff Parsons 2016-08-23 22:41:45 -07:00
commit 244f0dba32
7 changed files with 451 additions and 495 deletions
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6
modules/pc8080/lib/keyboard.js
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@ -922,11 +922,11 @@ Keyboard8080.prototype.isVT100TransmitterReady = function()
{
if (this.fVT100UARTBusy) {
/*
* NOTE: getCyclesMS(1.2731488) should work out to 3520 cycles for a CPU clocked at 361.69ns per cycle,
* which is roughly 2.76Mhz. We could just hard-code 3520 instead of calling getCyclesMS(), but this helps
* NOTE: getMSCycles(1.2731488) should work out to 3520 cycles for a CPU clocked at 361.69ns per cycle,
* which is roughly 2.76Mhz. We could just hard-code 3520 instead of calling getMSCycles(), but this helps
* maintain a reasonable blink rate for the cursor even when the user cranks up the CPU speed.
*/
if (this.cpu.getCycles() >= this.nVT100UARTCycleSnap + this.cpu.getCyclesMS(1.2731488)) {
if (this.cpu.getCycles() >= this.nVT100UARTCycleSnap + this.cpu.getMSCycles(1.2731488)) {
this.fVT100UARTBusy = false;
}
}