Flex 1, 2, or 3?

Tom Lake

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Jan 28, 2026, 8:10:34 AMJan 28

to Altair-Duino

When we eventually do get Flex OS for the 680, are you planning on using version 1, 2, or 3?

Chris Davis

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Jan 28, 2026, 8:22:16 AMJan 28

to Altair-Duino

I added the ROM because it was easy. I never looked any further. I welcome all contributions.

Tom Lake

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Jan 28, 2026, 8:41:26 PMJan 28

to Altair-Duino

Is there any way to load a DSK file or only S19 files?

Chris Davis

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Jan 29, 2026, 8:37:53 AMJan 29

to Altair-Duino

Currently just S19 files, plus plain text BASIC or VTL-2 files.

Kelly Loyd

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Jan 29, 2026, 9:14:27 AMJan 29

to Altair-Duino

I've been reading over Mike Douglas excellent reference material for hooking up the 680 to disk drives. The 680 never had a MITS disk controller, it was done with the parallel I/O board (UIO). I suppose it would be possible to emulate a disk controller in the AD680. Assembly source is provided by Mike.

For reference reading the FLEX 3.0 section - notes and blank disk images
https://deramp.com/downloads/altair/software/altair_680/Serial%20FLEX%203.0/

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