Reproduction Altair 88-UIO Universal I/O Board

Discuss construction, troubleshooting, and operation of the Altair 8800c computer

Re: Reproduction Altair 88-UIO Universal I/O Board

Postby AltairClone » March 31st, 2024, 8:50 am

Great work!

Mike
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby tep392 » April 1st, 2024, 7:28 pm

AltairClone wrote:Great work!

Mike


Thank you for all the help you gave throughout the project!
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby toml_12953 » April 4th, 2024, 11:45 am

tep392 wrote:
toml_12953 wrote:Attempt to upload Excel BOM for 88-UIO board.


It looks like some have fallen out of stock. It's a constant battle for us vintage computer enthusiasts.


Yes, it certainly is! At least Digi-Key will ship the parts when they do come in.
I ordered the out-of-stock parts on eBay, though, since I'm notoriously impatient!
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby tep392 » April 7th, 2024, 8:31 am

I built up a production board and it's working perfectly!

Finished.jpeg
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby AltairClone » April 7th, 2024, 6:09 pm

Lookin’ good!
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby Wayne Parham » April 8th, 2024, 8:20 am

Sweet!
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby toml_12953 » April 8th, 2024, 4:46 pm

The boards arrived today. Beautiful! This should be an easy build. The solder mask is right on and all the holes look good.

Thank you for all your work to produce this wonderful board!
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby tep392 » April 8th, 2024, 9:23 pm

toml_12953 wrote:The boards arrived today. Beautiful! This should be an easy build. The solder mask is right on and all the holes look good.

Thank you for all your work to produce this wonderful board!


Thanks Tom! It is easy to build. There's just a ton of solder joints, roughly 700.
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby tep392 » April 16th, 2024, 8:33 am

I added an FDC+ to my system and connected a Percom drive (Atari version). I had to disconnect the Atari interface board and add a ribbon cable from the drives to the FDC+. Spent some time copying disk images to floppy. Now my system is cooking! Dual minidisks, cassette deck, 64K RAM plus ROM with only a 4 slot backplane!

DiskSetup.jpg
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Re: Reproduction Altair 88-UIO Universal I/O Board

Postby AltairClone » April 16th, 2024, 9:01 am

Cool setup!
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