Regarding the issue of a small CP/M TPA on Horizon machines (due to ROMs @
E800h, etc.)...
I came across an interesting article in the October 1983 issue of
Microsystems magazine. The proposed solution is not to move the ROMs
around, but to create a version of CP/M that "straddles" the ROM code. It
makes for interesting reading. I've posed scans on the yahoo northstar
goup:
http://tech.groups.yahoo.com/group/NorthStar_Computers/files/61K%20CPM%20Upgrade/
-John