64kib

10/13/2018

08:57 PM EclaireXL Feature #76: Merge down to trunk

Easy part done, merged down.
For now I branched firmware into firmware_eclairexl and firmware_legacy (for other pl... foft

08:32 PM EclaireXL Feature #76 (In Progress): Merge down to trunk

Made an svn copy of existing trunk (branches/releases/trunk_20181013_premerge)
Also made a backup of lots of random ... foft

10/12/2018

09:49 PM EclaireXL Core v31

A very simple, but hard to find, change this time!
Wizard of Wor was failing due to the code switching back and fo... foft

09:45 PM EclaireXL Bug #33 (Closed): Wizard of Wor

I modeled this by adding a 1 cycle delay on sel9bitpoly going high. The game then works! foft

09:04 PM EclaireXL Bug #33: Wizard of Wor

The high bit of audctl is sel9bitpoly. In the original chip is is delayed and then combined with itself. So I need a ... foft

08:44 PM EclaireXL Bug #33: Wizard of Wor

Altirra has two massive poly tables and selects between them with this flag. So, not really much help since here we a... foft

08:34 PM EclaireXL Bug #33: Wizard of Wor

I think the 17/9 bit lsfr is based on the decap schematics, so this is probably down to the number of cycles to delay... foft

08:33 PM EclaireXL Bug #33: Wizard of Wor

I set them to nop ... then the game works and no longer crashes! foft

08:19 PM EclaireXL Bug #33: Wizard of Wor

easier to set memory on xex or atx version...
36FD: A9 8F LDA #$8F
36FF: 8D 08 D2 STA AUDCTL... foft

08:10 PM EclaireXL Bug #33: Wizard of Wor

Will try nopping these to see (on cart!!)
A0BB: A9 8F LDA #$8F
A0BD: 8D 08 D2 STA AUDCTL
A0... foft

08:03 PM EclaireXL Bug #33: Wizard of Wor

With 8f for only ... 6 cycles foft

07:57 PM EclaireXL Bug #33: Wizard of Wor

It writes 8f and 00 often to audctl. This switches the shift register from 17 bit to 9 bit and back. Could there be s... foft

07:45 PM EclaireXL Bug #33: Wizard of Wor

No Pokey IRQs
Reads pots, writes potgo
Reads random
Reads skstat
+ plays some music
Nothing out of the ordinar... foft

10/11/2018

09:41 PM EclaireXL Bug #33: Wizard of Wor

I put my real pokey back in the 600Xl to confirm. Definitely works properly with real pokey and definitely fails with... foft

09:34 PM EclaireXL Bug #33: Wizard of Wor

Nope, fails with pokeymax in mono mode too!
So, the issue seems to be with pokey. OK, getting closer! Will check w... foft

09:25 PM EclaireXL Bug #33: Wizard of Wor

I'm trying it on my 600XL. I'm getting similar crashes, when running with PokeyMAX. So could be a Pokey bug, or incom... foft

08:10 PM EclaireXL Bug #33: Wizard of Wor

Crashes in the same way with T65, so... I guess its not a cpu bug! foft

08:04 PM EclaireXL Bug #33: Wizard of Wor

I think its a CPU bug, trying to wire up T65 to see if that works. If it does, I'll run the CPUs against each other a... foft

10/09/2018

08:55 PM EclaireXL Bug #33: Wizard of Wor

Disables them at $a535 then never re-enables... (this address is normal, I see this call on Altirra) foft

08:44 PM EclaireXL Bug #33: Wizard of Wor

One of the common crashes is when it ends up with the character set in the bottom half. In this state there are no NM... foft

07:39 PM EclaireXL Bug #33: Wizard of Wor

Tried shifting the dli, seems to then work.
Tried removing my cpu hack, no change.
Updated to latest cpu core, chan... foft