Re: cuda.cc from Pearpc question

[BALATON Zoltan]

On Mon, 17 Mar 2025, Andrew Randrianasulu wrote:
> https://github.com/sebastianbiallas/pearpc/blob/master/src/io/cuda/cuda.cc
>
>
> here you can see comment
>
> // VIA timer runs at a frequency of 1/1.27655us
> // or 783361.40378364 ticks/second
> #define VIA_TIMER_FREQ_DIV_HZ_TIMES_1000 (783361404ULL)
>
>
> yet  in qemu we have
>
> 4700000 / 6
> = 783333
>
> is this change significant ?

Adding Mark as he may know more about this. This value seems to be used in 
pmu.c and cuda.c but mac_via.c has #define VIA_TIMER_FREQ (783360) 
(parenthesis superfluous around constant) which is closer. I think it may 
make the VIA timers a bit inaccurate but probably not enough to be 
noticable as these are used for short delays. Maybe if this is the same 
for all Macs these defines could be unified somewhere to make it 
consistent?

Regards,
BALATON Zoltan