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Altair 8800

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Welcome to the Altair 8800 Google Group. This group is for the discussion of anything related to the MITS Altair 8800 computer and other vintage S100 computer hardware and software.

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Walt Perko, … Joseph Corda5

9:05 PM

Which CP/M BOOT .DSK is Best ???

Good questions Walt .. along those same lines I would be interested in: Learning more about the basic

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Which CP/M BOOT .DSK is Best ???

Good questions Walt .. along those same lines I would be interested in: Learning more about the basic

9:05 PM

Feb 9

Infocom Games for CP/M 2.2

Hey all! I've had an Altair 8800 clone from Mike Douglas for a few years, but started to more

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Infocom Games for CP/M 2.2

Hey all! I've had an Altair 8800 clone from Mike Douglas for a few years, but started to more

Feb 9

Peter Sterrantino, … Todd Houg9

Feb 9

Shugart Disk Drive Ribbon Cables

Power connector part numbers from the Shugart 800 manual, these are still available from Digikey and

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Shugart Disk Drive Ribbon Cables

Power connector part numbers from the Shugart 800 manual, these are still available from Digikey and

Feb 9

Walt Perko, Peter Sterrantino4

Feb 2

VDM-1 and the Processor Technology Subsystem B ...

Hi, No, you use a serial keyboard or an external terminal like in Mike's video. Watch the

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VDM-1 and the Processor Technology Subsystem B ...

Hi, No, you use a serial keyboard or an external terminal like in Mike's video. Watch the

Feb 2

Jan 28

Thought this Altair 8800 Collection Might be of Interest

Wanted to share with the community: my late father's Altair collection is at auction closing

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Thought this Altair 8800 Collection Might be of Interest

Wanted to share with the community: my late father's Altair collection is at auction closing

Jan 28

Jan 25

CCS 2718A SerialA setup .. Fixed ... Thanks to Patrick, Tim and Walt

This is a follow up conversation I had with Tim, Walt, and Patrick during our Zoom meeting tonight(

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CCS 2718A SerialA setup .. Fixed ... Thanks to Patrick, Tim and Walt

This is a follow up conversation I had with Tim, Walt, and Patrick during our Zoom meeting tonight(

Jan 25

Jan 23

TermDriver 2 ... a USB to Serial Adapter w/Video Display ...

Hi, Has anybody try one of these USB to TTL Serial adapter yet? https://www.crowdsupply.com/excamera/

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TermDriver 2 ... a USB to Serial Adapter w/Video Display ...

Hi, Has anybody try one of these USB to TTL Serial adapter yet? https://www.crowdsupply.com/excamera/

Jan 23

Terry Fox, … Patrick Linstruth6

Jan 19

Walt's boardset.

I understand Patrick, thanks. If Walt is willing to use Altmon instead of AMON, I can set his boards

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Walt's boardset.

I understand Patrick, thanks. If Walt is willing to use Altmon instead of AMON, I can set his boards

Jan 19

Joseph Corda, Patrick Linstruth5

Jan 17

AltairZ80 / Altair8800 SIMH - Is it possible to set memory range as Read Only?

Interesting .. Currently JoeMon is not so smart.. and as such It does not check RAM boundaries.

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AltairZ80 / Altair8800 SIMH - Is it possible to set memory range as Read Only?

Interesting .. Currently JoeMon is not so smart.. and as such It does not check RAM boundaries.

Jan 17

Walt Perko, Richard Fadden3

Jan 14

Reforming Capacitors ...

Hi, I don't think you're going to learn all that much from me as I should be considered a

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Reforming Capacitors ...

Hi, I don't think you're going to learn all that much from me as I should be considered a

Jan 14

Luke Anderson, Patrick Linstruth2

Jan 12

Altair 8800 build - troubleshooting Front Panel LED behavior

The S100 bus has separate data in and data out lines. The CPU is bidirectional. The front panel only

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Altair 8800 build - troubleshooting Front Panel LED behavior

The S100 bus has separate data in and data out lines. The CPU is bidirectional. The front panel only

Jan 12

Jan 9

A Slight Mention in Nuts&Volts ...

Hi, The Altair 8800 | Nuts & Volts Magazine https://www.nutsvolts.com/magazine/article/

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A Slight Mention in Nuts&Volts ...

Hi, The Altair 8800 | Nuts & Volts Magazine https://www.nutsvolts.com/magazine/article/

Jan 9

Walt Perko, … Joseph Corda6

Jan 8

OP-80A SetUp & Run Micro Soft BASIC v1.0 ...

Tim Thanks for sharing the options Joe On Thu, Jan 8, 2026 at 1:32 AM Tim Geuy <tim....@gmail.com

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OP-80A SetUp & Run Micro Soft BASIC v1.0 ...

Tim Thanks for sharing the options Joe On Thu, Jan 8, 2026 at 1:32 AM Tim Geuy <tim....@gmail.com

Jan 8

Walt Perko, Joseph Corda2

Jan 3

Sunday ZOOM #0018 ... FDD Connections ...

Walt and Patrick A fdc+ overview and discussion on Teac 55. Would be great for me ! I've been

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Sunday ZOOM #0018 ... FDD Connections ...

Walt and Patrick A fdc+ overview and discussion on Teac 55. Would be great for me ! I've been

Jan 3

Joseph Corda, Terry Fox4

Jan 1

Altair8800 or AltairZ80 SIMH and connecting console to a physical serial port?

ITS ALIVE !!! Thanks to Patrick Linstruth for his help.. as he guided me to the solution. A few

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Altair8800 or AltairZ80 SIMH and connecting console to a physical serial port?

ITS ALIVE !!! Thanks to Patrick Linstruth for his help.. as he guided me to the solution. A few

Jan 1

Walt Perko, … Joseph Corda9

12/28/25

Sunday ZOOM #17 ...

Patrick Sorry about my late reply ..wish I saw this earlier .. anyways I would like to see this next

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Sunday ZOOM #17 ...

Patrick Sorry about my late reply ..wish I saw this earlier .. anyways I would like to see this next

12/28/25

12/24/25

Anybody hear about this?

Hi, Are there any S-100 projects using an Arduino? https://arstechnica.com/gadgets/2025/11/arduinos-

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Anybody hear about this?

Hi, Are there any S-100 projects using an Arduino? https://arstechnica.com/gadgets/2025/11/arduinos-

12/24/25

Walt Perko, … Joseph Corda11

12/24/25

CromemCo ZPU board in an Altair 8800 or 8800c ...

Patrick That is GREAT progress.. Also thanks for all your effort on getting my ZPU card to work ! Joe

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CromemCo ZPU board in an Altair 8800 or 8800c ...

Patrick That is GREAT progress.. Also thanks for all your effort on getting my ZPU card to work ! Joe

12/24/25

Terry Fox, … Walt Perko3

12/23/25

YAY! Found the latest TDL ZPU board problem

Hi, Wow Great! I hope that's the last fix for the computer. So is that the 9-Slot Backplane, mini

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YAY! Found the latest TDL ZPU board problem

Hi, Wow Great! I hope that's the last fix for the computer. So is that the 9-Slot Backplane, mini

12/23/25

12/11/25

DigiTalker Demos ???

Hi, Has anybody seen a demo video of a DigiTalker singing a song? I can't seem to find one on

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DigiTalker Demos ???

Hi, Has anybody seen a demo video of a DigiTalker singing a song? I can't seem to find one on

12/11/25

12/9/25

TIC & SpeakJet Demo Video ...

Hi, This is a basic demo showing the stepper motor moving from the commands sent from my Altair 8800c

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TIC & SpeakJet Demo Video ...

Hi, This is a basic demo showing the stepper motor moving from the commands sent from my Altair 8800c

12/9/25

Walt Perko, Joseph Corda2

12/8/25

Thanks for posting Walt.. I noticed the images I included in my original email did not display

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Thanks for posting Walt.. I noticed the images I included in my original email did not display

12/8/25

Walt Perko, Patrick Linstruth5

12/7/25

A ZOOM Subject ???

Hi, Either way, IF somebody ... even multiple people with different setups could demonstrate from

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A ZOOM Subject ???

Hi, Either way, IF somebody ... even multiple people with different setups could demonstrate from

12/7/25

Walt Perko, Joseph Corda3

11/29/25

Subject for the Sunday ZOOM ???

Hi, Great Joe ... I hope we can get some discussion and answers on those questions. Here's

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Subject for the Sunday ZOOM ???

Hi, Great Joe ... I hope we can get some discussion and answers on those questions. Here's

11/29/25

Walt Perko, … Patrick Linstruth9

11/24/25

Image to Gerber Companies ...

Hi, More info from ScanCAD.net: Dear Walt, Thank you for your recent inquiry! You will also be

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Image to Gerber Companies ...

Hi, More info from ScanCAD.net: Dear Walt, Thank you for your recent inquiry! You will also be

11/24/25

Walt Perko, Joseph Corda4

11/20/25

Need Help to Build a Quick Reference Help Page ...

Perfect.. thanks Walt! On Thu, Nov 20, 2025 at 8:02 PM Walt Perko <r4r...@gmail.com> wrote: Hi,

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Need Help to Build a Quick Reference Help Page ...

Perfect.. thanks Walt! On Thu, Nov 20, 2025 at 8:02 PM Walt Perko <r4r...@gmail.com> wrote: Hi,

11/20/25

Joseph Corda, … Walt Perko7

11/20/25

DZMBASIC and Dazzler.. I gave it a try

Walt Happy to share.. I attached the DZM_XMAS.BAS file.... A few comments about the code... As you

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DZMBASIC and Dazzler.. I gave it a try

Walt Happy to share.. I attached the DZM_XMAS.BAS file.... A few comments about the code... As you

11/20/25

Joseph Corda, Walt Perko2

11/14/25

Recomended Z80 Assembler for CP/M v2.2 and v3

Hi, The idea of not just the best, but two or three 8080 and Z80 assemblers might make a good demo

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Recomended Z80 Assembler for CP/M v2.2 and v3

Hi, The idea of not just the best, but two or three 8080 and Z80 assemblers might make a good demo

11/14/25

Walt Perko, Terry Fox3

11/9/25

Sunday ZOOM ... Got a question? Got an idea to discuss?

Programmed Output is just the OUTPUT PORT 0xFF. You can output to port 0xFF, the results will show up

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Sunday ZOOM ... Got a question? Got an idea to discuss?

Programmed Output is just the OUTPUT PORT 0xFF. You can output to port 0xFF, the results will show up

11/9/25

Walt Perko, Joseph Corda4

11/9/25

Reproducing the mini-Front Panel ...

Hi, This is the closest I've gotten to a mini-Front Panel Rev.F schematic: http://ilvunix.com/

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Reproducing the mini-Front Panel ...

Hi, This is the closest I've gotten to a mini-Front Panel Rev.F schematic: http://ilvunix.com/

11/9/25

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