Northstar Horizon

Dave Dunfield dave06a at
Sun Nov 26 08:44:57 CST 2006

> FYI the e800h start address works for SD or DD as the SD rom appears twice
> in the address space at both e800h and e900h.

Not always - I have several different revs of SD controller cards, and I know that
on at least one of them the E900 rom does NOT mirror at E800 - however I also
have several cards that do mirror (which is nice because you don't have to change
the CPU jumpers to swap SD/DD controllers).


dave06a (at)    Dave Dunfield
dunfield (dot)  Firmware development services & tools:
com             Collector of vintage computing equipment:

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