Date   : Mon, 25 Feb 1991 22:01:38 GMT
From   : hoptoad!curt@ucbvax.Berkeley.EDU (Curt Mayer)
Subject: Advantage memory expansion, Software

If you have an Northstar Advantage model III, 
on the cpu card there are 9 positions for 16 pin dips. if you stuff these
with 150ns 64k dram, and put .47uf bypass caps beside them, you can
access the memory via the memory management registers. this gives
you 128k of ram, just enough for cpm3.

i'm in the middle of a cpm3 port, bios to be posted here.  This may
take a while, since the disk controller is so bloody stupid.

. Does anybody know how to get the Advantage to read soft sector?
  the 8-16 msdos does it, very slowly.

. Does anybody have bios source?

. Has anybody seen a ms-dos greater than version 1.25 for this beast?

. how about source to io.sys?? drool.

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