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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 Corda3

Nov 29

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

Nov 29

Walt Perko, … Patrick Linstruth9

Nov 24

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

Nov 24

Walt Perko, Joseph Corda4

Nov 20

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,

Nov 20

Joseph Corda, … Walt Perko7

Nov 20

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

Nov 20

Joseph Corda, Walt Perko2

Nov 14

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

Nov 14

Walt Perko, Terry Fox3

Nov 9

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

Nov 9

Walt Perko, Joseph Corda4

Nov 9

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/

Nov 9

Walt Perko, … Patrick Linstruth10

Nov 4

I think it's the mini-Front Panel ...

I would need to look at the schematic for the front panel, but it sounds like the front panel may be

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I think it's the mini-Front Panel ...

I would need to look at the schematic for the front panel, but it sounds like the front panel may be

Nov 4

Walt Perko, Joseph Corda3

Oct 27

Working on a new build ...

Hi, I've used the switches on other projects in the past ... I'm still waiting for the five

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Working on a new build ...

Hi, I've used the switches on other projects in the past ... I'm still waiting for the five

Oct 27

Oct 23

9-Slot Backplane Power IN connections ...

Hi, Looking at the side power IN connector on the 9-Slot backplane it wires up: +8V & GND -16V

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9-Slot Backplane Power IN connections ...

Hi, Looking at the side power IN connector on the 9-Slot backplane it wires up: +8V & GND -16V

Oct 23

Joseph Corda, Patrick Linstruth10

Oct 22

AltairZ80 SIMH: Can you convert v3.x ".dsk" files to work on v4.x

Thanks Patrick I will give it a try but honestly your suggestion of using a cpm3 that already works(

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AltairZ80 SIMH: Can you convert v3.x ".dsk" files to work on v4.x

Thanks Patrick I will give it a try but honestly your suggestion of using a cpm3 that already works(

Oct 22

Walt Perko, … Patrick Linstruth8

Oct 18

Subjects for ZOOMs ...

Hi, Yes, this is a new untested backplane. A great example why I think we need a two board

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Subjects for ZOOMs ...

Hi, Yes, this is a new untested backplane. A great example why I think we need a two board

Oct 18

Joseph Corda, … Patrick Linstruth12

Oct 16

Newbie Front Panel question 8800c and Don C miniFP

I don't know of any CPU boards that have 12V on the white Molex connector. There are only 8 pins

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Newbie Front Panel question 8800c and Don C miniFP

I don't know of any CPU boards that have 12V on the white Molex connector. There are only 8 pins

Oct 16

Walt Perko, … Patrick Linstruth19

Oct 16

Setting Up my ZAltair mini-FP computer ...

Walt, maybe we can use your current problem as an example of using the front panel to diagnose a

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Setting Up my ZAltair mini-FP computer ...

Walt, maybe we can use your current problem as an example of using the front panel to diagnose a

Oct 16

Oct 11

the Don Caprio mini-Front Panel ...

Hi, I like the panel because it's smaller. I only wish two things for the panel: 1. The holes for

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the Don Caprio mini-Front Panel ...

Hi, I like the panel because it's smaller. I only wish two things for the panel: 1. The holes for

Oct 11

Walt Perko, Patrick Linstruth3

Oct 11

BOOT Loaders ???

Hi, A follow-up on the Altair ROMs: The three ROMs are key parts of how MITS and other Altair 8800

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BOOT Loaders ???

Hi, A follow-up on the Altair ROMs: The three ROMs are key parts of how MITS and other Altair 8800

Oct 11

Oct 9

FYI ... Multiple Displays on One Monitor ...

Hi, He starts with the names of the ROMs on his RAM17 board at 4:40 into the video. Can anybody

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FYI ... Multiple Displays on One Monitor ...

Hi, He starts with the names of the ROMs on his RAM17 board at 4:40 into the video. Can anybody

Oct 9

Oct 4

Soldering by Maggie Zeng ...

Hi, Found another image showing soldering tips: . On Monday, September 22, 2025 at 1:35:04 PM UTC-7

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Soldering by Maggie Zeng ...

Hi, Found another image showing soldering tips: . On Monday, September 22, 2025 at 1:35:04 PM UTC-7

Oct 4

Oct 4

Next Zoom meeting topic suggestion.. Available Monitor programs

Greetings If time allows I would be interested in a brief discussing on the different Monitor

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Next Zoom meeting topic suggestion.. Available Monitor programs

Greetings If time allows I would be interested in a brief discussing on the different Monitor

Oct 4

Joseph Corda, … Walt Perko3

Sep 30

Can a Gotek (with Flashfloppy) emulate a Altair 8" drive ?

Hi, Another thing to understand is that there are different versions of the GoTek drives. The one I

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Can a Gotek (with Flashfloppy) emulate a Altair 8" drive ?

Hi, Another thing to understand is that there are different versions of the GoTek drives. The one I

Sep 30

Sep 30

Thin FR4 v. Thick FR6 Backplanes ...

Hi, Okay, these discussions on the S100Group are focused on backplanes for both Altair 8800 and much

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Thin FR4 v. Thick FR6 Backplanes ...

Hi, Okay, these discussions on the S100Group are focused on backplanes for both Altair 8800 and much

Sep 30

Walt Perko, … Terry Fox7

Sep 28

Backplane v. Termination ...

I don't think I can make todays Zoom meeting. I think John problem was that he was trying to

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Backplane v. Termination ...

I don't think I can make todays Zoom meeting. I think John problem was that he was trying to

Sep 28

Tim Geuy, Walt Perko2

Sep 26

ZOOM invitation

Hi, You're added to the list ... All I needed was your email address ... . On Tuesday, September

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ZOOM invitation

Hi, You're added to the list ... All I needed was your email address ... . On Tuesday, September

Sep 26

Walt Perko, … Joseph Corda8

Sep 23

Questions for a ZOOM:

Hi, The info for it is also on my website: http://www.brainless.org/Altair/Repository.html#section31

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Questions for a ZOOM:

Hi, The info for it is also on my website: http://www.brainless.org/Altair/Repository.html#section31

Sep 23

Sep 23

Suggested future Zoom meeting topic - Basic review and testing of unknown S100 boards

Greetings.. If there is enough interest... As I purchase or trade for S-100 bus cards from diff

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Suggested future Zoom meeting topic - Basic review and testing of unknown S100 boards

Greetings.. If there is enough interest... As I purchase or trade for S-100 bus cards from diff

Sep 23

Joseph Corda, … Terry Fox7

Sep 21

ArduinoFDC: A project to test 3.5" amnd 5.25" floppy drives

THe primary reason I did not add reading/writing data at the time is that most microcontrollers are

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ArduinoFDC: A project to test 3.5" amnd 5.25" floppy drives

THe primary reason I did not add reading/writing data at the time is that most microcontrollers are

Sep 21

Sep 21

RS-232 to USB ...

Hi, There are several adapters and cable adapters that work, but beware, some of the older ones (Some

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RS-232 to USB ...

Hi, There are several adapters and cable adapters that work, but beware, some of the older ones (Some

Sep 21

Charles Wall, Walt Perko2

Sep 20

ESP32 Serial Server

Hi, https://www.tindie.com/products/deltec/esp32-fdc-serial-drive-server/ . On Saturday, September 20

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ESP32 Serial Server

Hi, https://www.tindie.com/products/deltec/esp32-fdc-serial-drive-server/ . On Saturday, September 20

Sep 20

Walt Perko, pat...@deltecent.com3

Sep 18

ESP32 FDC+ Editing ???

Hi, Okay, all my confusion was because when I hit <ENTER> at the prompt ... I don't get

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ESP32 FDC+ Editing ???

Hi, Okay, all my confusion was because when I hit <ENTER> at the prompt ... I don't get

Sep 18

Sep 13

Re: [Altair-8800] Digest for altair-8800@googlegroups.com - 2 updates in 1 topic

How do you get on the email list for the zoom meetings, and are recordings available? On Fri, Sep 12,

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Re: [Altair-8800] Digest for altair-8800@googlegroups.com - 2 updates in 1 topic

How do you get on the email list for the zoom meetings, and are recordings available? On Fri, Sep 12,

Sep 13

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