Bug Fix for the RetroModem ...

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Walt Perko

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Jul 1, 2026, 4:27:29 PMJul 1
to Altair 8800
Hi, 
 
Tim has one, I have one and I found a bug in the phone book ...  

I explained the problem to Scott Swazey and he sent me the command to update:  

AT&U=4.0.9

 

It will upgrade and reboot. you should see:

Zimodem Firmware v4.0.9-sportster

sdk=v4.4.7-dirty chipid=3 cpu@240

tot=8192k heap=230k fsize=1404k

READY.

 

After that you should be able to type the following:

ATPT"0:23=COFFEEMUD.NET"

OK

 

ATPT"1:8080=CBBS.MITSALTAIR.COM"

OK 



.

Walt Perko

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Jul 1, 2026, 6:05:29 PMJul 1
to Altair 8800
Hi,  

Slight correction:  

ATPT  then "phonebook number = BBS:port"  

ATPT"0=COFFEEMUD.NET:23"

OK

 

ATPT"1=CBBS.MITSALTAIR.COM:8080"

OK


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