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- To: hatari-devel@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [hatari-devel] _FRB cookie in Falcon emulation
- From: Uwe Seimet <Uwe.Seimet@xxxxxxxxx>
- Date: Fri, 1 Aug 2025 09:32:35 +0200
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Hi,
I wonder whether there have been other changes of this kind? When running
Hatari with an unpatched TOS 4.04 the _ramtop ($5a4) and _ramvalid ($5a8)
reflect the presence of Fast-RAM. Is this standard TOS 4.04 behavior? I do
not have a Falcon with Fats-RAM, i.e. I cannot verify this.
Best regards
Uwe
> Hi,
>
> I just noticed this recent commit:
>
> * 842d0d63 - Install a _FRB cookie when using TT RAM in Falcon mode (4 days ago) <Thomas Huth>
>
> As far as I can tell this commit changes the handling of the _FRB cookie when
> running an unmodified version of TOS 4.04. This would have a very negative
> effect on some hard disk drivers, which base decisions on how to deal with
> transfers to alternate RAM on this cookie.
> Therefore I would like to request to revert this change.
>
> Best regards
>
> Uwe
>
>