Re: Strange 8255 behavior

From: groepaz_at_gmx.net
Date: Tue, 12 Jun 2018 19:14:02 +0200
Message-ID: <13790823.RJnYx6QrjP@rakete>
Am Dienstag, 12. Juni 2018, 19:08:49 CEST schrieb Gerrit Heitsch:
> On 06/12/2018 07:06 PM, Mia Magnusson wrote:
> > Den Tue, 12 Jun 2018 17:44:57 +0200 skrev groepaz@gmx.net:
> >> Am Dienstag, 12. Juni 2018, 17:05:20 CEST schrieb Mia Magnusson:
> >>> I can't remember which versions, but at least some version of the
> >>> CIAs can only be used as one of the two CIA's in a C64. Using it as
> >>> the other CIA causes keyboard problems.
> >> 
> >> no, both can be (and are commonly) used in either position
> > 
> > Well, there are some revision of the CIA that only work in one
> > position. I'll have to check the exact label of it.
> 
> You sure you're not talking about using a 8520, meaning a CIA meant for
> the Amiga, in a C64?

i'm suspecting that too... and then it will only "kindof work" for some 
programs - anything complex will likely fail due to slightly different 
behaviour.

-- 

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<Dieter Wiefelspütz , SPD>
Received on 2018-06-12 20:03:22

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