3 Apr
2003
3 Apr
'03
7:34 a.m.
From: ard(a)p850ug1.demon.co.uk
The Z90 is built to be 64K a H89 isn't. As far
as I recall, the H89 took more than a simple jumper or
switch to make it CP/M compatable.
Also, one should note that HDOS came in both hard and soft sectored.
Dwight
MTR-90 is in the ROM on the 89's CPU board.
My MTR-90 manual indicates
[...]
It certainly seems as if you can run both
controllers in one machine.
You most certainly can. My Z90 (essentially the same machine -- AFAIK the
differences are that it came fully assembled ('Z', not 'H'), and came
with 64K RAM, has MTR-90, the hard sector controller and the
double-density soft sector controller. The former is cabled to the single
built-in drive, the latter to an external drive box.
It will boot either HDOS or CP/M, and can use both types of disks
-tony