Very fast characters in PS1's Zero Divide on Retroarch's PCSX

[geysonazevedo27]

PCSX-ReARMed Version

r24I 650460e

Your device

PC

Operating System of your device

Windows

CPU architecture

x86-64 (64bit Intel, AMD, etc.)

Issue description

When I play PS1's Zero Divide on Retroarch's PCSX, the characters in the game are very accelerated, like, very fast.

Step-by-step reproduction and logs

This happens every time I fight in the game, there is no way to post a photo, but if you play on Retroarch you will notice that the characters move very quickly, could you please fix this problem?

[notaz]

@pcercuei this needs stalling on any COP2 access while GTE is busy. Otherwise the processing the game is doing fits into 1/60s and it starts running at 60fps instead of intended 30fps at 2x speed. There is a gte_cycletab table in gte.c with timing. It's not always simple to do it due to branches, but handling basic cases (stalls on reading results in the next insn) should be enough for this game.

[geysonazevedo27]

Will it take a long time to solve the problem?

[geysonazevedo27]

@notaz Is this problem very complex to solve? It's been almost a week since I sent this issue and nothing

[hizzlekizzle]

@geysonazevedo27 dude, chill out. it'll get fixed when it gets fixed.

Since he pinged pcercuei, I would guess it's a lightrec issue. Have you tried going to quick menu > core options > system > dynamic recompiler OFF? Since you're on an x86_64 system, you should have plenty of grunt to run the interpreter.

[geysonazevedo27]

@hizzlekizzle I went into the configuration and left the dynamic recompiler OFF and the CPU overclocked to 47 and it improved.

[pcercuei]

Will it take a long time to solve the problem?

I'll have a look, probably this year, or in 2026.

[geysonazevedo27]

Take a look calmly @pcercuei

[geysonazevedo27]

@pcercuei It will take a long time to solve this problem?

[pcercuei]

You already asked, I already answered.