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MODEL_5170_REV3 boots without errors now

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However, performance will suffer until I can implement RTC interrupts;
also, there may be a problem exposed by the BIOS memory test following a soft reset
This commit is contained in:
Jeff Parsons 2014-10-14 16:07:46 -07:00 • committed by jeffpar
commit 997db9787b
15 changed files with 1557 additions and 1282 deletions
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23
my_modules/pcjs-client/lib/hdc.js
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@ -1642,6 +1642,27 @@ HDC.prototype.outATCDrvHd = function(port, bOut, addrFrom)
{
this.messagePort(port, bOut, addrFrom, "DRVHD");
this.regDrvHd = bOut;
/*
* The MODEL_5170_REV3 BIOS (see "POST2_CHK_HF2" @F000:14FC) probes for a 2nd hard drive when the number
* of configured hard drives is something other than 2, using INT 0x13/AH=0x10. This in turn calls the
* BIOS "TST_RDY" function, which selects the drive in this register (see DRIVE_MASK), and then immediately
* expects regStatus to reflect success or failure.
*
* We were always returning success, because no ATC command was actually issued, and so the user would
* always get a spurious CMOS configuration error: "System Options Not Set-(Run SETUP)".
*
* So now we update regStatus here. I'm not sure which status bits are normally set to indicate failure,
* but it should be sufficient to set or clear the READY bit according to whether the drive exists or not.
*
* TODO: Dig into the ATC documentation some more, and determine what other situations, if any, regStatus
* needs to be updated.
*/
var iDrive = (this.regDrvHd & HDC.ATC.DRVHD.DRIVE_MASK? 1 : 0);
if (this.aDrives[iDrive]) {
this.regStatus |= HDC.ATC.STATUS.READY;
} else {
this.regStatus &= ~HDC.ATC.STATUS.READY;
}
};
/**
@ -2558,12 +2579,10 @@ HDC.prototype.intBIOSDisk = function(addr)
if (DEBUGGER) {
if (this.dbg && this.dbg.messageEnabled(this.dbg.MESSAGE_HDC) && DL >= 0x80) {
this.dbg.message("HDC.intBIOSDisk(AX=" + str.toHexWord(this.cpu.regAX) + ",DL=" + str.toHexByte(DL) + ") at " + str.toHexAddr(addr - this.cpu.segCS.base, this.cpu.segCS.sel));
// this.cpu.haltCPU();
this.cpu.addInterruptReturn(addr, function (hdc, nCycles) {
return function onBIOSDiskReturn(nLevel) {
nCycles = hdc.cpu.getCycles() - nCycles;
hdc.messageDebugger("HDC.intBIOSDisk(" + nLevel + "): C=" + (hdc.cpu.getCF()? 1 : 0) + " (cycles=" + nCycles + ")");
// if (DEBUG && nCycles > 10000) hdc.cpu.haltCPU();
};
}(this, this.cpu.getCycles()));
}