Summary

This change adjusts FIFO wake timing and CMDFIFO batching only for Voodoo1.
On fast emulated CPUs, some games (e.g., Final Racing) showed slow menu interaction when using a Voodoo1 card. Increasing batching and reducing wake frequency fixes this without affecting rendering or compatibility.

During testing, the same change applied to other cards (Voodoo2/Banshee/Voodoo3) could cause stalls in certain titles (for example Scream Rally 2 would freeze right when the race started). Because of that, the original behavior is restored for every card except Voodoo1.

No rendering logic or register behavior is modified here, only timing.

Files Changed

src/video/vid_voodoo.c
src/video/vid_voodoo_fifo.c

Code Changes

src/video/vid_voodoo_fifo.c
Voodoo1 uses a longer delay between FIFO thread wakeups; other cards keep the original value:

#define WAKE_DELAY_DEFAULT (TIMER_USEC * 100)
#define WAKE_DELAY_OF(v) ((v)->type == VOODOO_1 ? (TIMER_USEC * 2000) : WAKE_DELAY_DEFAULT)

timer_set_delay_u64(&voodoo->wake_timer, WAKE_DELAY_OF(voodoo));

src/video/vid_voodoo.c
Voodoo1 batches more CMDFIFO writes before waking the thread.
Other cards keep the original < 20 threshold to avoid stalls:

if (voodoo->type == VOODOO_1) {
    if ((voodoo->cmdfifo_depth_wr - voodoo->cmdfifo_depth_rd) > 300)
        voodoo_wake_fifo_thread(voodoo);
} else {
    if ((voodoo->cmdfifo_depth_wr - voodoo->cmdfifo_depth_rd) < 20)
        voodoo_wake_fifo_thread(voodoo);
}

Before / After (Final Racing, Voodoo1)

Before (slow UI):

After (normal speed):

Testing

Notes

• No ROM changes required
• No effect on rendering/output
• All behavior changes are guarded by voodoo->type == VOODOO_1