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Manufacturer Heath/Zenith
Model H-8
Date Announced 1977
Date Canceled Unknown
Number Produced Tens to hundreds of thousands
Country of Origin USA
Price $375 in kit form and up
Current Value $50-$500
Processor Intel 8080
Speed 2 MHz
RAM 4K - 64K
Storage Cassette Tape, 5.25 floppy disks
Expansion 8 slots
Bus Heathkit Proprietary
Video N/A
I/O Serial. Optionally Parallel
OS Options HDOS, CP/M
Notes The Heathkit H-8 was an early entry into the personal computer market. It was more like the Altair and Imsai systems of the day then the more complete Apple, Commodore and Radio Shack entries. The machine consisted of a power supply and a number of slots into which processor, RAM and IO cards were plugged. The user interface was the front panel which consisted of a small LED display and a 16 key keypad for data entry. Typically a terminal and disk drives were added to make the machine far more useful.
Related Items in Collection H17 and H37 disk drive subsystems, some manuals, some software.
Related Items Wanted Additional software, manuals, etc.

The H-8 in my collection hasn't yet been fully evaluated but it does run and appear to try and boot the floppy drives. Look for updates and photos here as time permits.

(Submitted January 23, 2014 08:59:00 by (a href=mailto:GoAwaySpambot)Lee(/a))

An add-on company named Trionyx produced a wide range of upgrades for the H-8 not the least of which was a backplane for the device that replaced the nasty tin connectors with proper gold plated connectors. Another nice add-on was an endplate replacement that had two nice ventilation fans built into it.

(Submitted September 27, 2010 13:20:57 by (a href=mailto:)Mark(/a))

Unbuilt Heathkit H-8 currently available on ebay -- 230530270802 until 10/3/10

(Submitted September 26, 2010 09:36:55 by DC Shoemaker)

I have some of the original test routines in source code, and the HDOS source code books. I'm looking for the source listing for the H-37 ROM? Anyone want to trade? (New email address replaces earlier post.)

(Submitted September 4, 2010 19:32:49 by Bill Baldwin)

H8 + H9 + h19 and full documentation available. I haven't checked the software for many years, but they might work.

(Submitted May 29, 2010 10:41:05 by Norbert)

Would like to buy a Heathkit H-8 for restoration purposes. Already own one and was able to restore it to boot from an IDE hard drive by using the Z-67 controller.



(Submitted May 6, 2010 16:58:43 by Shawn)

I have: 2 h8's (one z80 mod and other stock) both have 64k (4 boards and 1 64k) h17 with h37 mod h47 dual 8 drives h17 board h37 board and lots more (sorry sent the h9 and z19 to the bin) still have the z29

have all the manuals and 8,5 floppies. more software than you can want!!

dual casset board and a color broad w/ an Amd 9511

Tapes of focal8 and so much more.

Hey, op systems: Hdos,msdos,cpm,mpm2,some z100 stuff too.. You can call me and leave a msg.614-506-5627 Shawn Oh! yes I did pack rat several things and a man by the name of Bob Ellerton may remember me.

(Submitted April 25, 2010 19:08:50 by Tim)

I have a Heathkit H89 and a Heathkit H77 for sale both in excellent condition. I also have some software for them. I also have a Zenith Data Systems printer type thing-a-majig for sale as well, that is also in excellent condition. Contact me if your interested and I will send pics

(Submitted June 13, 2009 12:34:29 by Frank)

I have all kinds of H8, H19, H89, H0, H17 hardware, manuals, software, etc for sale. Anyone interested?

(Submitted April 28, 2009 11:03:15 by Jack Peeples)

All my H8/H17/H19 equipment has been sold. Thanks, Jack

(Submitted March 23, 2009 15:00:32 by Jack Peeples)

I have two H8 Computers, two H19 Terminals, & two H17 Disk Drives in working order, complete with manuals & software. Anyone interested in buying them??

(Submitted March 1, 2009 22:45:46 by (a

Hi, I have an H8 with floppy drives and terminal that all appear to be working, but, I have no software.

Anyone have software they would care to share?


(Submitted December 10, 2007 04:46:47 by Chuck_S)

My H8 is sold. Sorry the message is still here.

)(Submitted July 25, 2005 18:16:34 by Chuck S) I have a working H8 + H19 terminal which needs a good home. All the manuals. H37 soft sector controller. Z80 motherboard at 4MHz. 64K of RAM. Running HDOS.

Email me with offers!

)-- Chuck

-- Chuck

(Submitted October 25, 2007 15:00:56 by Kori)

I have an H8 Emulator that runs on Mac OS 9. If someone wants a copy, drop me a line.

I also have an H8, H19, tapes, software, and manuals - all in boxes in my spare room !

(Submitted January 11, 2007 19:13:55 by Lionel Theunissen)

Would like to buy a Heathkit H-8. Anyone have one for sale?

(Submitted November 29, 2006 12:29:37 by davewa)

Your description of the H-8 is incomplete. It also supported 8 floppies and the H67 (10 mB) hard drive and there was an optional Z-80 processor card. See my site: for considerably more information, pictures and a (partially complete) emulation for Windows.

(Submitted November 25, 2006 17:39:49 by Isaac Davidian)

I have a Heath/Zenith Z-19 terminal, great for an H8. We also used them with other CP/M computers. + extra boards and keyboards from Z-19's that were scrapped. All free to a good home, but I really don't want to ship. Located in Fresno, California.

(Submitted May 15, 2006 10:17:05 by Walt)

I have an HP H-8 Computer, that I would like to sell, at home that I built around 1976-78??. It is in Excellent working order and I also have the source code and instruction manuals that go with it.

(Submitted July 25, 2005 18:16:34 by Chuck S)

I have a working H8 + H19 terminal which needs a good home. All the manuals. H37 soft sector controller. Z80 motherboard at 4MHz. 64K of RAM. Running HDOS.

Email me with offers!

-- Chuck

(Submitted July 18, 2005 15:55:17 by (a href=mailto:)1ajs(/a))

i also have the paper strips for the h10 you put your code on in the origonal boxs wonders what that is worth must be a rare thing to come bye these days

(Submitted May 26, 2005 21:18:02 by (a href=mailto:)1ajs(/a))

i have the heathkit h11 digitalcomputer heathkit h10 papertape system the h77 and the good old heathkit comouter i also have the dual 16bit procesor exspation card for it and manuals for all the gaer i have i inharited it all from my dad unfornatly i don't know how to use any of his toys though have all the software for them to and all his paper strips and exstra paper strips ect

(Submitted April 14, 2005 17:27:38 by DC Shoemaker)

I have some of the original test routines in source code, and the HDOS source code books. I'm looking for the source listing for the H-37 ROM? Anyone want to trade?

(Submitted April 2, 2005 08:57:25 by Mr. Henson)

I have an H-88 for sale.. I want rid of it The crazy thing boots up and lets me type things into it

(Submitted December 21, 2004 20:52:53 by (a href=mailto:rick.pepper)Rick Pepper(/a))

I have 2 full sets of manuals for the H8 Computer, Video Monitor, Memory Boards, I/O Board, Dot Matrix Printer, Dual Floppy Drive. I also have some software including original HDOS with the full operating manuals, Benton Harbor Basic with user manuals, PIE Editor, and a full Word Processing package. I also have some games on floppy disks. If you are interested in any or all of this, please contact me at

Kind Regards...

Rick Pepper

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