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

Simplified the I/O registration function, added support for Panel debugger messages, and added some new Panel behavior on the RESET instruction

Browse source
This commit is contained in:
Jeff 2016-11-15 10:05:25 -08:00 • committed by Jeff Parsons
commit 5bc0c8cca9
12 changed files with 327 additions and 246 deletions
Download patch file Download diff file Expand all files Collapse all files

36
modules/pdp11/lib/cpuops.js
View file

@ -1471,6 +1471,42 @@ PDP11.opRESET = function(opCode)
{
if (!(this.regPSW & PDP11.PSW.CMODE)) {
this.resetCPU();
if (this.panel) {
/*
* The PDP-11/70 XXDP test "EKBBF0" reports the following, with PANEL messages on ("m panel on"):
*
* CNSW.writeWord(177570,000101) @033502
* CNSW.readWord(177570): 000000 @032114
* LOOK AT THE CONSOLE LIGHTS
* THE DATA LIGHTS SHOULD READ 166667
* THE ADDRESS LIGHTS SHOULD READ CNSW.readWord(177570): 000000 @032150
* 032236
* CHANGE SWITCH 7 TO CONTINUE
* CNSW.readWord(177570): 000000 @032236
* stopped (31518011 instructions, 358048873 cycles, 58644 ms, 6105465 hz)
* R0=166667 R1=002362 R2=000000 R3=000000 R4=000000 R5=026642
* SP=001074 PC=032236 PS=000344 SR=00000000 T0 N0 Z1 V0 C0
* 032236: 032737 000200 177570 BIT #200,@#177570
* >> tr
* CNSW.readWord(177570): 000000 @032236 (cpu halted)
* R0=166667 R1=002362 R2=000000 R3=000000 R4=000000 R5=026642
* SP=001074 PC=032244 PS=000344 SR=00000000 T0 N0 Z1 V0 C0
* 032244: 001773 BEQ 032234 ;cycles=0
* >> tr
* R0=166667 R1=002362 R2=000000 R3=000000 R4=000000 R5=026642
* SP=001074 PC=032234 PS=000344 SR=00000000 T0 N0 Z1 V0 C0
* 032234: 000005 RESET ;cycles=5
*
* It's a little hard to see why the DATA lights should read 166667, since the PANEL messages indicate
* that the last CNSW.writeWord(177570) was for 000101, not 166667. So I'm guessing that the RESET
* instruction is supposed to propagate R0 to the console's DISPLAY register.
*
* This is similar to what we do for the HALT instruction on the PDP-11/20. None of these Console features
* seem to be very well documented (assuming they exist).
*/
this.panel.setData(this.regsGen[0], true);
}
}
this.nStepCycles -= 667; // TODO: Review (but it's definitely a big number)
};