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Are Lisa 2/10 and 2/5 I/O boards interchangeable

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Hi Lisa enthusiasts,


I have a 2/5 which has I/O problems due to the corrosion and myself and a fellow member are trying to diagnose. I need to find out if the I/O board is the fault or potentially the edge connectors or traces on the motherboard. I don’t have a spare I/O board unfortunately.

Is it possible to interchange a 2/10 I/O board for a 2/5? This will require use of the same 2/5 motherboard, CPU card and memory boards although the latter 2 I believe are interchangeable between any Lisa system ROMs dependant I suppose if you have the Mac XL screen mod and 800k drive. A source using the Lisa FAQ says it is but the Lite Adapter should see modifications which involve cutting traces. So if I disconnect the Lite Adapter can I do it? Has anybody tried this?


Ive also read many posts on this forum that say you will destroy or damage the system if you plug in a 2/10 I/O board into a 2/5 system and since the rarity of these boards are forever increasing I would like very much to not add another dead one to the pile. 


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  • 4 weeks later...

You don't even have to disconnect the Lite adapter, the floppy drive simply won't work. The Lite adapter does 2 things: a pin converter to hook up the sony, and a PWM converter for the disk speed signal which is different between the twiggy and sony disks.



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  • 5 months later...

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