Just starting an 8800c build - 9 slot motherboard questions

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

Just starting an 8800c build - 9 slot motherboard questions

Postby alank2 » May 11th, 2021, 10:49 am

I noticed in Mike's video he mentions not making the motherboard active, but leaving it passive. What components should be loaded on the board then? Power connector? Fuses? Any capacitors?
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Re: Just starting an 8800c build - 9 slot motherboard questi

Postby toml_12953 » May 12th, 2021, 3:53 am

alank2 wrote:I noticed in Mike's video he mentions not making the motherboard active, but leaving it passive. What components should be loaded on the board then? Power connector? Fuses? Any capacitors?


I have just the power connectors (and S-100 sockets, of course!) on mine. Nothing else. It's been working fine with eight boards on it for a couple years now.

Altair 8800 CPU board
Mike's FP interface board
FDC+ board (64K RAM and floppy interface)
Altair 88-UIO board with serial and cassette interface
Altair 88-VI RTC interrupt/RTC board
Altair 88-C700 printer interface board
Two 88-2SIOJP serial boards
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Re: Just starting an 8800c build - 9 slot motherboard questi

Postby AltairClone » May 13th, 2021, 10:15 pm

Yes, Tom is correct, only S-100 connectors and the power connector. You can jumper across the fuse locations since your switching supplies will protect themselves and the downstream circuits.

Mike
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