Altair 8800 - Google Groups

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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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Jul 12

Capacitor Kits for Repairing some computers ... NOT Altair 8800 or Altair 680 or IMSAI 8080

Walt I found the link to the capacitor kits: https://console5.com/store/computer-cap-kits.html Yes I

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Capacitor Kits for Repairing some computers ... NOT Altair 8800 or Altair 680 or IMSAI 8080

Walt I found the link to the capacitor kits: https://console5.com/store/computer-cap-kits.html Yes I

Jul 12

Jul 12

Cassette Tape Alternatives ...

Hi, Things to lookup after the ZOOM: https://www.pcbway.com/project/shareproject/

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Cassette Tape Alternatives ...

Hi, Things to lookup after the ZOOM: https://www.pcbway.com/project/shareproject/

Jul 12

Todd Houg, Peter Higgins3

Jul 10

Moving files to/from .DSK disk images

Thanks Peter! I am currently playing with Patrick's Altair8800 version of the simulator, but will

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Moving files to/from .DSK disk images

Thanks Peter! I am currently playing with Patrick's Altair8800 version of the simulator, but will

Jul 10

Terry Fox, Joseph Corda2

Jul 7

Fujinet startup documentation

Terry Thanks for sharing Joe On Tue, Jul 7, 2026 at 12:18 AM Terry Fox <wb4...@gmail.com> wrote

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Fujinet startup documentation

Terry Thanks for sharing Joe On Tue, Jul 7, 2026 at 12:18 AM Terry Fox <wb4...@gmail.com> wrote

Jul 7

Jul 1

Bug Fix for the RetroModem ...

Hi, Slight correction: ATPT then "phonebook number = BBS:port" ATPT"0=COFFEEMUD.NET:23

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Bug Fix for the RetroModem ...

Hi, Slight correction: ATPT then "phonebook number = BBS:port" ATPT"0=COFFEEMUD.NET:23

Jul 1

Walt Perko, Patrick Linstruth6

Jun 30

88-2SIOR1 and 88-2SIOJP OutPuts LOW ???

Hi, My bad, I should have checked the little switch on the oscilloscope lead ... it was moved to 10x

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88-2SIOR1 and 88-2SIOJP OutPuts LOW ???

Hi, My bad, I should have checked the little switch on the oscilloscope lead ... it was moved to 10x

Jun 30

Walt Perko, … Mike Douglas10

Jun 27

Failing to fix AMON to run as a .COM file under CP/M 2.2 ...

Hi, I was hoping I could go from CP/M 2.2 into AMON so I could load little HEX programs into RAM to

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Failing to fix AMON to run as a .COM file under CP/M 2.2 ...

Hi, I was hoping I could go from CP/M 2.2 into AMON so I could load little HEX programs into RAM to

Jun 27

Peter Sterrantino, … Walt Perko9

Jun 27

Dazzler II with 8080/8085?

Thanks Peter. I did see the faster chip on the Microchip page, but didn't cross reference it back

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Dazzler II with 8080/8085?

Thanks Peter. I did see the faster chip on the Microchip page, but didn't cross reference it back

Jun 27

Walt Perko, Patrick Linstruth10

Jun 21

Differences ??? 8080 v. Z80 ???

Hi, Seems the cable connecting my Altair 8800c and the Port 0 of the ZAltair Z80c computer was

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Differences ??? 8080 v. Z80 ???

Hi, Seems the cable connecting my Altair 8800c and the Port 0 of the ZAltair Z80c computer was

Jun 21

Jun 19

EasyEDA S-100 Template ...

Hi, Okay, here's a blank template S-100 board ... How to use it with EasyEDA? After downloading,

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EasyEDA S-100 Template ...

Hi, Okay, here's a blank template S-100 board ... How to use it with EasyEDA? After downloading,

Jun 19

Jun 17

HAYES 2400 SMARTMODEM ... Less than $30! ...

Hi, After the last ZOOM, talking about the WiFi Retromodem for Hayes Smartmodem I decided to look for

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HAYES 2400 SMARTMODEM ... Less than $30! ...

Hi, After the last ZOOM, talking about the WiFi Retromodem for Hayes Smartmodem I decided to look for

Jun 17

Walt Perko, Mike Douglas3

Jun 15

How to compile an MBASIC program ???

Here's a session compiling, linking and running SAMPLE.BAS that's on the BASCOM.DSK disk

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How to compile an MBASIC program ???

Here's a session compiling, linking and running SAMPLE.BAS that's on the BASCOM.DSK disk

Jun 15

Walt Perko, Mike Douglas2

Jun 13

Here is some history and sources for the program often called LS on CP/M systems. Shouldn't be

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Here is some history and sources for the program often called LS on CP/M systems. Shouldn't be

Jun 13

Walt Perko, Joseph Corda3

Jun 10

For the Collectors ...

Walt Thanks for sharing these .. So I've already collected a few KayPro 2's and an Osborne,

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For the Collectors ...

Walt Thanks for sharing these .. So I've already collected a few KayPro 2's and an Osborne,

Jun 10

Jun 6

Why a MBASIC PONG game doesn't work as fast as hoped ...

Hi, I posted a demo of DECPONG-1 on YouTube https://www.youtube.com/watch?v=eo7uYDsaoH8 . On Friday,

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Why a MBASIC PONG game doesn't work as fast as hoped ...

Hi, I posted a demo of DECPONG-1 on YouTube https://www.youtube.com/watch?v=eo7uYDsaoH8 . On Friday,

Jun 6

Walt Perko, Patrick Linstruth5

Jun 5

RS-232 OUT from 88-2SIOR1 Port 1 Address 18d/19d

They fail because either your cabling is wrong or there is something wrong with your program. Did you

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RS-232 OUT from 88-2SIOR1 Port 1 Address 18d/19d

They fail because either your cabling is wrong or there is something wrong with your program. Did you

Jun 5

Walt Perko, Patrick Linstruth2

Jun 1

Modern Magazines about Vintage Computers ???

This is one: https://www.computesgazette.com/ Mostly Commodore and Atari, but the Altair was featured

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Modern Magazines about Vintage Computers ???

This is one: https://www.computesgazette.com/ Mostly Commodore and Atari, but the Altair was featured

Jun 1

May 27

Got a Notice Today ...

Hi, Two Color LEDs: https://www.tme.com/us/en-us/katalog/tht-leds-rectangle_112903/params/b754_led-

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Got a Notice Today ...

Hi, Two Color LEDs: https://www.tme.com/us/en-us/katalog/tht-leds-rectangle_112903/params/b754_led-

May 27

Walt Perko, Joseph Corda3

May 22

How to delete odd files with odd filenames in CP/M 2.2?

Hi, I've tried *. etc. I keep getting the same message "No File" ... Then I ReBOOTed

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How to delete odd files with odd filenames in CP/M 2.2?

Hi, I've tried *. etc. I keep getting the same message "No File" ... Then I ReBOOTed

May 22

Walt Perko, … Peter Higgins12

May 19

Ripping the software off 5-1/4 in. Floppies ...

Sorry Walt - I please substitute "Kryoflux" with "Greaseweazle". I think the

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Ripping the software off 5-1/4 in. Floppies ...

Sorry Walt - I please substitute "Kryoflux" with "Greaseweazle". I think the

May 19

May 19

ESP32 FDC+ WiFi Adapter ...

Hi, 192.168.0.56 is the IP address of my ESP32 FDC+ adapter. I'm trying to connect with the

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ESP32 FDC+ WiFi Adapter ...

Hi, 192.168.0.56 is the IP address of my ESP32 FDC+ adapter. I'm trying to connect with the

May 19

Peter Sterrantino, … Patrick Linstruth6

May 17

Legacy Pixels VT100

Hi Patrick, Thanks for the info. Those two switches did the trick. Pete On Sun, May 17, 2026 at 11:19

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Legacy Pixels VT100

Hi Patrick, Thanks for the info. Those two switches did the trick. Pete On Sun, May 17, 2026 at 11:19

May 17

Walt Perko, … Patrick Linstruth12

May 15

BASH or other .HEX to .BIN Converter for Altair 8800 computers ???

Hi, Okay, that is probably the problem I was having with the AMON.HEX file. The XGPro TL866 II Plus

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BASH or other .HEX to .BIN Converter for Altair 8800 computers ???

Hi, Okay, that is probably the problem I was having with the AMON.HEX file. The XGPro TL866 II Plus

May 15

Walt Perko, … Tim Geuy5

May 15

ZOOM Meeting Starting Time Change?

I have a prior commitment this Sunday at that time - catch you all next week On Thursday, May 14,

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ZOOM Meeting Starting Time Change?

I have a prior commitment this Sunday at that time - catch you all next week On Thursday, May 14,

May 15

May 15

Anybody Need some .DSK Tools?

Hi, I haven't tried them yet: https://github.com/phatchman/altair_tools .

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Anybody Need some .DSK Tools?

Hi, I haven't tried them yet: https://github.com/phatchman/altair_tools .

May 15

Walt Perko, … Patrick Linstruth7

May 13

How to Assemble a small Assembly Program ???

Hi, That's my Typo ... Yes, the command line is: A:ASM FILENAME.AAZ and that works great. Then

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How to Assemble a small Assembly Program ???

Hi, That's my Typo ... Yes, the command line is: A:ASM FILENAME.AAZ and that works great. Then

May 13

May 8

Original MITS Altair 680 Manuals ...

Hi, Kind of pricey ... I recommend haggling a little on the price: https://bend.craigslist.org/ele/d/

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Original MITS Altair 680 Manuals ...

Hi, Kind of pricey ... I recommend haggling a little on the price: https://bend.craigslist.org/ele/d/

May 8

May 7

Great Prices for Vintage Computers and Peripherals ...

Hi, He's got Dual 8" Floppies Shugart and PerSci, Two IMSAI computers, Vector Graphic

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Great Prices for Vintage Computers and Peripherals ...

Hi, He's got Dual 8" Floppies Shugart and PerSci, Two IMSAI computers, Vector Graphic

May 7

Peter Sterrantino, … Peter Higgins4

May 5

S100 Board Template for KiCad

Hi Peter, Thanks for this. I'm relatively new to these forums so was unaware of Steve's

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S100 Board Template for KiCad

Hi Peter, Thanks for this. I'm relatively new to these forums so was unaware of Steve's

May 5

Walt Perko, Joseph Corda2

Apr 26

8080/8085 Simulator ...

Walt I have not . but thanks for the link .. I will bookmark to take a look at a later time Joe On

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8080/8085 Simulator ...

Walt I have not . but thanks for the link .. I will bookmark to take a look at a later time Joe On

Apr 26

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