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norberto.collado koyado.com
, …
Dave McGuire
24
Sep 6
Where I can find affordable 256x8 PROMs?
Yes, I need them to enable 4 boards. I need now 4-pcs and not 5, as I was able to program a set for
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Where I can find affordable 256x8 PROMs?
Yes, I need them to enable 4 boards. I need now 4-pcs and not 5, as I was able to program a set for
Sep 6
ocl...@earthlink.net
, …
James Doty
4
Sep 5
H8 MINI keycaps, labels and case files now available
Cool, then I'll join as a contributor and hope I can bring something useful to the table. =======
unread,
H8 MINI keycaps, labels and case files now available
Cool, then I'll join as a contributor and hope I can bring something useful to the table. =======
Sep 5
Lee Hart
, …
ocl...@earthlink.net
105
Sep 5
An H8 Badge for VCFMW
Hi James. Glenn summed up the situation pretty well. I still have some rev.A PCBs. Contact me
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An H8 Badge for VCFMW
Hi James. Glenn summed up the situation pretty well. I still have some rev.A PCBs. Contact me
Sep 5
ocl...@earthlink.net
, …
norberto.collado koyado.com
10
Sep 1
H8 Mini case design complete
Dave, what kind of system is this? Get Outlook for iOS From: se...@googlegroups.com <sebhc@
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H8 Mini case design complete
Dave, what kind of system is this? Get Outlook for iOS From: se...@googlegroups.com <sebhc@
Sep 1
norberto.collado koyado.com
Aug 26
CDR Floppy Controller HDOS driver and CP/M bootable disk.
Hello, I'm trying to boot Joe's CDR CP/M disk using the ACTUAL CDR Floppy Controller, but
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CDR Floppy Controller HDOS driver and CP/M bootable disk.
Hello, I'm trying to boot Joe's CDR CP/M disk using the ACTUAL CDR Floppy Controller, but
Aug 26
glenn.f...@gmail.com
, …
Joseph Corda
6
Aug 25
DRAFT REMarks for review (punching your own hard-sectored disks)
Glenn.. Nice Job.. I'm looking forward to your next installment concerning printing your own 3D-
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DRAFT REMarks for review (punching your own hard-sectored disks)
Glenn.. Nice Job.. I'm looking forward to your next installment concerning printing your own 3D-
Aug 25
Ronald West
,
Glenn Roberts
3
Aug 21
H8 Project Progress
Great work Ron! Thanks for sharing. Sent from my iPad On Aug 21, 2026, at 4:43 PM, Ronald West <
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H8 Project Progress
Great work Ron! Thanks for sharing. Sent from my iPad On Aug 21, 2026, at 4:43 PM, Ronald West <
Aug 21
Darrell Pelan
, …
norberto.collado koyado.com
24
Aug 12
Heathkit SweetP Plotter Documewnts
Thanks Joe and Darrell shall be fine to plug such cable onto your H89-Parallel board using the cable
unread,
Heathkit SweetP Plotter Documewnts
Thanks Joe and Darrell shall be fine to plug such cable onto your H89-Parallel board using the cable
Aug 12
norberto.collado koyado.com
, …
Lee Hart
8
Aug 5
H89 CDR floppy controller schematics!
I will need to find LLL's floppy diskette for HDOS (Livingstone Logic Labs) and hopefully it will
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H89 CDR floppy controller schematics!
I will need to find LLL's floppy diskette for HDOS (Livingstone Logic Labs) and hopefully it will
Aug 5
G. Beat
, …
glenn.f...@gmail.com
20
Aug 5
Zenith Z-19 ?
The MM5740 (?) keyboard encoder chip fails on these sometimes. Terry and I developed a replacement
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Zenith Z-19 ?
The MM5740 (?) keyboard encoder chip fails on these sometimes. Terry and I developed a replacement
Aug 5
Darko Mesaroš
, …
Tim R
10
Jul 24
H9 Terminal - Flyback noise
You are both right. The Plot mode is on, as I hit the key to try it. But even without the plot mode,
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H9 Terminal - Flyback noise
You are both right. The Plot mode is on, as I hit the key to try it. But even without the plot mode,
Jul 24
Ronald West
, …
glenn.f...@gmail.com
5
Jul 23
H8 serial interface question
Thanks norberto will give that a try tonight. Ron On Wed, Jul 22, 2026, 11:44 PM norberto.collado
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H8 serial interface question
Thanks norberto will give that a try tonight. Ron On Wed, Jul 22, 2026, 11:44 PM norberto.collado
Jul 23
high...@lightspeed.net
, …
glenn.f...@gmail.com
13
Jun 30
Still Hoping to Exhibit at VCF West
This page may have the information you need: https://k7mem.com/VC_EPA_Cassette_Adapter.html first off
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Still Hoping to Exhibit at VCF West
This page may have the information you need: https://k7mem.com/VC_EPA_Cassette_Adapter.html first off
Jun 30
Ronald West
, …
Joseph Travis
13
Jun 28
Open frame H8
Congrats! On Sun, Jun 28, 2026, 10:02 PM Ronald West <west...@gmail.com> wrote: Success! I
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Open frame H8
Congrats! On Sun, Jun 28, 2026, 10:02 PM Ronald West <west...@gmail.com> wrote: Success! I
Jun 28
Ronald West
, …
glenn.f...@gmail.com
3
Jun 12
Open Frame h8 issues
All good advice from Joe. If it were me, I'd bring the 8080 board back to original factory
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Open Frame h8 issues
All good advice from Joe. If it were me, I'd bring the 8080 board back to original factory
Jun 12
G. Beat
May 28
VCF Midwest : Exhibitors & Presenters
Virtual Computer Festival Midwest (VCFMW) September 12-13, 2026 Schaumburg Convention Center (NW
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VCF Midwest : Exhibitors & Presenters
Virtual Computer Festival Midwest (VCFMW) September 12-13, 2026 Schaumburg Convention Center (NW
May 28
norberto.collado koyado.com
May 22
Z80 V4 UPDATES!
Added a link on the new website for the Z80 V4 board. The new update includes a new Z80 monitor and a
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Z80 V4 UPDATES!
Added a link on the new website for the Z80 V4 board. The new update includes a new Z80 monitor and a
May 22
zen djn
, …
Tim R
7
May 20
H9 Troubleshooting
Hi David, Beyond the symptoms you have described, are there any functions that work? If you set it
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H9 Troubleshooting
Hi David, Beyond the symptoms you have described, are there any functions that work? If you set it
May 20
glenn.f...@gmail.com
, …
Joseph Travis
28
May 1
VCF East
Thanks for the photos! I didn't get around to see everything this year and it's nice to see
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VCF East
Thanks for the photos! I didn't get around to see everything this year and it's nice to see
May 1
norberto.collado koyado.com
,
Joseph Travis
4
May 1
H8-Multi-I/O board!
Thanks Joe! Let me try the VOM first. Get Outlook for iOS From: se...@googlegroups.com <sebhc@
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H8-Multi-I/O board!
Thanks Joe! Let me try the VOM first. Get Outlook for iOS From: se...@googlegroups.com <sebhc@
May 1
Matthew Kiehl
, …
Eric Mack
12
Apr 25
Unusual issues with CP/M on H8/H89, H17, and VSG.
Hi Santo, given the rapidly approaching move date and my health, I probably won't be able to
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Unusual issues with CP/M on H8/H89, H17, and VSG.
Hi Santo, given the rapidly approaching move date and my health, I probably won't be able to
Apr 25
norberto.collado koyado.com
, …
Dave McGuire
20
Apr 23
George Farris website is gone.
Ok, thanks George, I will research it a bit when the Slicer bubbles up to the top of the restoration
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George Farris website is gone.
Ok, thanks George, I will research it a bit when the Slicer bubbles up to the top of the restoration
Apr 23
norberto.collado koyado.com
Apr 19
Updated website with latest H8/H89 new boards.
Link here: https://koyado.com/heathkit/New-H8-Website/h8-h89-pcb-s.html Thanks, Norberto
unread,
Updated website with latest H8/H89 new boards.
Link here: https://koyado.com/heathkit/New-H8-Website/h8-h89-pcb-s.html Thanks, Norberto
Apr 19
glenn.f...@gmail.com
, …
B 9
8
Apr 14
How remarkable! - a new REMarks issue...
This is exactly the information I needed. Thank you Jeff and Glenn! —b9 On Fri, Apr 10, 2026 at 6:30
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How remarkable! - a new REMarks issue...
This is exactly the information I needed. Thank you Jeff and Glenn! —b9 On Fri, Apr 10, 2026 at 6:30
Apr 14
norberto.collado koyado.com
,
Joseph Travis
7
Mar 31
H8-MULTI-IO BOARD.
Board updated and latest files attached From: se...@googlegroups.com <se...@googlegroups.com>
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H8-MULTI-IO BOARD.
Board updated and latest files attached From: se...@googlegroups.com <se...@googlegroups.com>
Mar 31
Craig Bladow
, …
Randy E (OoMOR)
87
Mar 6
DIY Heathkit H8 Enclosure
OK, Thanks! On Friday, March 6, 2026 at 5:27:43 PM UTC-8 Norby wrote: Randy, there are YouTube videos
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DIY Heathkit H8 Enclosure
OK, Thanks! On Friday, March 6, 2026 at 5:27:43 PM UTC-8 Norby wrote: Randy, there are YouTube videos
Mar 6
Peter Kerr
, …
Ronald West
12
Feb 26
Looking for info on the H10A
Thanks Joe. I've got a bad scan of the schematic for the H10A. I sat down with a highlighter and
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Looking for info on the H10A
Thanks Joe. I've got a bad scan of the schematic for the H10A. I sat down with a highlighter and
Feb 26
geneb
, …
Peter Kerr
20
Feb 25
H10 reader/punch connector...
WRT swapping it out. the Molex connector has flying leads connected to the the board so you could
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H10 reader/punch connector...
WRT swapping it out. the Molex connector has flying leads connected to the the board so you could
Feb 25
Ronald West
, …
Todd Goodman
10
Feb 23
Front Panel Board
Hi Joe, Thank you for checking on the page and for the kind words. Todd On 2/23/2026 8:52 AM, Joseph
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Front Panel Board
Hi Joe, Thank you for checking on the page and for the kind words. Todd On 2/23/2026 8:52 AM, Joseph
Feb 23
Ronald West
,
Mark Garlanger
2
Feb 22
Group Join Request Pending
Hi Ron, For some reason google groups notifies me if there are messages pending, but not when there
unread,
Group Join Request Pending
Hi Ron, For some reason google groups notifies me if there are messages pending, but not when there
Feb 22