Re: 264 Series and their chips

From: Ruud_at_Baltissen.org
Date: Sat, 13 Aug 2011 18:23:17 +0200
Message-ID: <4E46A4F5.243.1A4D8AA@Ruud.Baltissen.org>
Hallo Gerrit,


Have you ever thought about replacing the 8501 with a 8502 from a 
C128? So far I found four differences:
- the 8501 has this MUX input (or output? I have no idea what it 
does) which the C128 lacks
- the 8502 has an "extra" NMI input compared to the 8501
- the 8501 lacks the P5 I/O pin, the 8502 P7
- pinout doesn't match
If the MUX gate doesn't spoil things, what about using the 8502? 
Regarding P5/P7: you either don't use the cassette recorder anymore 
or adjust the bits of the Kernal.

Just my two cents...


--
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  / /  |_/     Groetjes, Ruud Baltissen
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   \___|       http://Ruud.C64.org







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Received on 2011-08-13 17:00:13

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