8 Sep
1997
8 Sep
'97
6 a.m.
Kai Kaltenbach wrote:
Actually, a hard disk (H-67) was not standard for an H-89, only floppies
on an H-17 (hard sector) controller.
There are, IIRC, three changes that go into making an H-88 into an H-89:
1. New BIOS
2. Replacement of 1 or 2 PALs
3. H-17 and/or H-67 disk controller.
The cassette is not available in an H-89.
The H-67 Winchester controller was a SASI HD and 8" floppy controller.
There was also an H/Z-90. This was, basically, the same machine with
further revised firmware and an H-37 (soft sector) controller.
If memory serves, you can have any *two* of the disk controllers,
but not all three. My personal machine has an H-17 and an H-37.
One other possibility is that you may have a thied-party disk
controller like the Magnolia. This will require a HW-specific version
of CP/M.
<<<John>>>
Does anyone know what the difference is between
an H88 and H89? Externally, they look identical except for the badging.
Are they software compatible?
The H88 was a cassette-based Z-80 system. I got one by upgrading an
H-19 terminal. (I believe you could also buy it as a system.) When you
upgraded, you replaced the H-19 "badge" with an H-88 "badge".
You could also upgrade the H-88 to an H-89 by adding a hard disk
controller and floppy disk. When you upgraded, you replaced the H-88
"badge" with an H-89 "badge".