Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Interesting solution to interesting Horizon problem

2 views
Skip to first unread message

John Crane

unread,
Dec 13, 2009, 5:37:13 PM12/13/09
to
All,

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


All...@localhost.net

unread,
Dec 13, 2009, 11:03:51 PM12/13/09
to

I did mention that it was possible to put the bios above the
controller and the CCP and BDOS below it. It had been done before
that but on as a mention in BYTE readers comments or something
like that.

Allison

0 new messages