[ClassicCMP] Heath H89 diskette request

From: allisonp <allisonp_at_world.std.com>
Date: Sun Apr 9 18:57:27 2000

>On Sun, Apr 09, 2000 at 03:24:06PM -0400, allisonp wrote:
>> >All H-89's were sold in kit form. The H-88 is another story. These
were
>> >early all in one computers and did have 8080 CPU's in the beginning.
Most
>> >H-88 units were upgrades to the H-19 terminals.
>>
>> Wrong! the H88 was the diskless version of the h89 and was z80. The h8x
>> were all z80. The basic design was H19 terminal with an additional Z80
>> based card (with peripherals on ad in cards).
>
>Which part is wrong, that it's an upgrade from the H19, or that it's
>substantially different from the H89? I'm pretty sure I remember Heath
>selling an H19-to-H89 upgrade kit, but I dunno where the H88 fits in.


That there was an 8080 in some versions. The H8 was the 8080 machine.

There was an h19 to h88/89/90 upgrade and that was the cpu, PS and IO.
The base H8x was a h19 with those added items. In many ways it was not
unlike a Vt180 approach.

Aquired two H89s and gave them away. Kept the H19 I built in 1978.

Allison
Received on Sun Apr 09 2000 - 18:57:27 BST