Difference between revisions of "Heathkit H8"

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(Images: add wyse boot)
 
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File:Heathkit H8 rear.jpeg
 
File:Heathkit H8 rear.jpeg
 
File:H8 with 8080.jpg|8080
 
File:H8 with 8080.jpg|8080
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File:Heathkit H8 H17 HDOS Boots.png|Boots
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File:Heathkit H8 boots to Wyse.jpeg|boots to Wyse
 
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File:H8-4 Multi Port Serial IO as Received.jpg
 
File:H8-4 Multi Port Serial IO as Received.jpg
 
</gallery>
 
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==Notes==
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===Boot from Older ROM===
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From a discussion on the SEBHC google group [https://groups.google.com/g/sebhc/c/ub92uvlVRP0/m/-wj0DbD8AAAJ Glenn instructs] on how to boot an older ROM.
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<syntaxhighlight lang="text"> 
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You must have an early ROM. It was only later that Heath added single key boot (the early ROMs were developed before the H17 existed).
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To boot you must set the Program Counter register manually to 030.000 and then hit GO, so:
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 +
REG (decimal points light up...)
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PC (the “F” key, same as PC)
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ALTER (the “D” key; decimal points flash)
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0 3 0 0 0 0
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ALTER (decimals stop flashing...)
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GO (the “4” key)
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</syntaxhighlight>
  
 
==Documentation==
 
==Documentation==
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[[File:H8 Operation 595-2014-02-S.pdf|page=1|200px]]
 
[[File:H8 Operation 595-2014-02-S.pdf|page=1|200px]]
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===File:Heath Zenith H17-floppy-595-2160-03.pdf===
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*[[:File:Heath Zenith H17-floppy-595-2160-03.pdf|Heath Zenith H17-floppy-595-2160-03]]
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[[File:Heath Zenith H17-floppy-595-2160-03.pdf|page=1|200px]]
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===H8-4 multiport serial===
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*[[:File:OP H8-4 595-2248-S.pdf| H8-4 multiport serial]]
  
 
==See also==
 
==See also==

Latest revision as of 23:35, 27 May 2022

I believe I got this off of Craigslist. This H8 has the Z80 cpu


Heathkit computer catalog p. 1
Heathkit computer catalog p. 2
Heathkit computer catalog p. 4


Images

Serial number: n/a

Boards

HA8-6 Z80 CPU

Part number; 85-2609-11

U13 ROM marked XCONMOD maybe XCON.MOD

Controller Board

Part number; 85-2204-1

H8-4 Multi Port Serial IO as Received

Notes

Boot from Older ROM

From a discussion on the SEBHC google group Glenn instructs on how to boot an older ROM.

  
You must have an early ROM. It was only later that Heath added single key boot (the early ROMs were developed before the H17 existed).
To boot you must set the Program Counter register manually to 030.000 and then hit GO, so:
 
REG (decimal points light up...)
PC (the “F” key, same as PC)
ALTER (the “D” key; decimal points flash)
0 3 0 0 0 0
ALTER (decimals stop flashing...)
GO (the “4” key)

Documentation

Assembly

H8 Assembly 595-2013-01-S.pdf

Operation

H8 Operation 595-2014-02-S.pdf

File:Heath Zenith H17-floppy-595-2160-03.pdf

Heath Zenith H17-floppy-595-2160-03.pdf

H8-4 multiport serial

See also