| Re: [hatari-devel] TT emulation crashes when there is no ACSI drive |
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- To: hatari-devel@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [hatari-devel] TT emulation crashes when there is no ACSI drive
- From: Uwe Seimet <Uwe.Seimet@xxxxxxxxx>
- Date: Sun, 11 Aug 2019 15:25:43 +0200
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Hi,
I'm not familiar with what Hatari does with the cartridge code. Some
kind of initialization I assume that cannot be executed by different
means I assume?
Best regards
Uwe
> Uwe Seimet schrieb:
>
> > Sounds quite tricky. Why doesn't this also happen on real Atari hardware?
> > I'd assume that there could also be an MFP interrupt at a critical
> > moment.
>
> Yes, but there you don't have the Hatari cartridge code using additional
> stack space. I suppose those few words make the difference between
> working and crashing.
>
> Just to illustrate how tight this is: At the call to Pexec(7) in
> load_n_reloc [1], the stack pointer is at $01E7BA. The basepage of the
> GEMDOS process is at $01E700, so that the register save area extends up
> to $01E77F; meaning there are only 58 bytes of stack left before the
> register save area is corrupted.
>
> Regards
> Christian
> [1] <https://git.tuxfamily.org/hatari/hatari.git/tree/src/cart_asm.s#n198>
> --
> Christian Zietz - CHZ-Soft - czietz@xxxxxxx
> WWW: http://www.chzsoft.de/
> PGP/GnuPG-Key-ID: 0x52CB97F66DA025CA / 0x6DA025CA
>
>