Re: VIC-II DRAM refresh

From: Michał Pleban <>
Date: Fri, 14 Oct 2016 17:12:55 +0200
Message-ID: <>

Francesco Messineo wrote:

> isn't the 8520 a 6526A (or B?) but made with a different process? I
> could use the 8520 in place of the 6526 with no problems once.

No. The 8520 has a different TOD timer, if you use it in the C64 the
programs which rely on it will not work (or will display incorrect
time). Also the TI$ variable in BASIC relies in the TOD in one of the
CIAs so it will not work too.


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Received on 2016-10-14 16:00:02

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