On Wed, 11 Apr 2001 ncoplin@orbeng.com wrote: > >I'd like to use this on my SCPU in the future. Stay out of the vicII > mirror > >space. However, feel welcome to use d700 > > As far as I know, the SCPU only writes through to the VIC at $D000, and none > of its mirrors. It's given as #1 recommendation when programming for SCPU > compatibility. > > Having said that, it is possible that all non-standard writes in the I/O > region will be lost by the SCPU, and so only DE00-DFFF are only valid use by > this and other projects. Can someone who has a SCPU and 2nd SID at d700 > confirm this??? It's commonly known that there's memory at page $d3, as well as the SCPU I/O reg's someplace in $d00-d300. As for the rest of the region, I dont know where the reads or writes go. They might go to the static ram underneath, but I doubt it. Otherwise, afaik, all I/O writes to d400-d7ff as well as de00-dfff go out the card edge on both sides. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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