Re: [hatari-devel] Recent regression (commit 527b68f6)

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 05/02/2022 à 14:37, Christian Zietz a écrit :
> Hello,
>
> with a current snapshot of Hatari, I cannot boot TOS 2.06 (in ST mode),
> anymore. Hatari just hangs with a white screen before even the Fuji logo
> appears. GUI is unresponsive, i.e., pressing F12 or AltGr+[Key] does
> nothing.
>
> EmuTOS, in contrast, still boots.
>
> Bisecting points to this commit:
>
> commit 527b68f6b09c779f5eddd272aa2362c09fafc7cd
> Author: Nicolas Pomarède <npomarede@xxxxxxxxxxxx>
> Date:   Sat Jan 29 23:01:32 2022 +0100
>
>      Fix PendingInterruptCount in CycInt_CallActiveHandler

Hi

this is likely the same bug that Eero reported in "freeze in mfp / 
interrrupt code" and similar to the one I saw too when booting with tos 
1.04.

From what I see, it's related to TOS timer D that runs very fast at 
boot with earlier tos version (timer ctrl=1 data=2) and this messes with 
new mfp/cycint code. A possible fix is to enable the option in system 
"patch timer d" while waiting for a proper fix in the code.

Nicolas