Date: 2004-02-09 16:49:36
Ruud, On Mon, 9 Feb 2004, Baltissen, GJPAA (Ruud) wrote: > I would say it is an hardware error but .... > > I have tried two of my 128s and both my REUs with the same result. > two 128s and two REUs with the same error ??? No, don't think so. Exactly my thoughts too. > Hmmm....., question: can reading a MMU-register also trigger an action? > The MMU registers are situated at $FF00 and $D500 (IIRC). Question for > Niklas: what is the starting address? I've tried many different starting addresses, from $0000 to $E000 (which should cause the C128 to wrap around after $FFFF, right?). Same result everywhere. But I'm not sure that the REU sees the MMU registers at $FF00. "Mapping the C128" is a little unclear on this, but I think that you can make it see only RAM all the way. This is true for the shared RAM at the bottom of memory anyway. When reading from RAM1 with a DMA device (VIC-II and the REC), it doesn't see the shared RAM. /Niklas Ramsberg aka < . (:) Bacon < . Message was sent through the cbm-hackers mailing list
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