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Any Heathkit/Zenith H/Z-90 owners?

I should have recognized that since it had a RCA plug hanging off the rear outside. It's a Zenith meaning factory-assembled but apparently the model# stick-on had fallen off. A classiccmp regular identified it as a model 90. It has a FDD, and the terminal board mounted on the internal rear. Forget what that is (H-19 ?). Can't remember what it's problem was. perhaps a monitor error but I never had any software for it. One of those to-do tasks which never got high-enough on the list. Thanks, that clears up one of my incomprehensibles, but perhaps I should simply sell it as is and not further complicate my extensive to-do list.

Lawrence

mrz80 said:
What you have is a cassette interface board, which was used for storing/retrieving data off of audio cassettes.

The H-88 was the computer shipped with just the cassette interface board, and anywhere from 16K to 48K of RAM.

The H/Z-89 was the computer shipped with an H-17 hard sectored disk controller card. The H/Z-90 (don't recall if the kit version used the -90 or not) would have included the H/Z-37 soft sectored controller board, which would work with single or double sided 40 or 96tpi drives. Somewhere in the mix was also a new set of relocating ROMs that moved the bootloader to high RAM so the OS could load at 0x0000; this was necessary for CP/M to run unmodified applications (which expected a jump table at 0x0000 and a program start at 0x0100).
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ziloo said:
...a fellow by the name of Lee Heart who is a H/Z system guru. He was a frequent contributor to SEBHC group, and I haven't heard from him for sometimes now. So...no, sorry but I can't help you there.
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Lee is still around, and still clinging tenaciously to his Heath stuff which he won't part with for love nor money (I keep trying to talk him out of that H-1000 CPU of his but he ain't budging! :) ). He was the principal behind Technical Micro Systems, Inc (TMSI). They sold emulator boards that gave the H89 graphics compatibility with a Tektronix 40xx terminal, and the aforementioned H-1000, which was a dual processor board - Z80a and an 8086 - which let the -89 run MS-DOS. It's gotta be the rarest holy grail of holy grails of Heath addons.
 
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