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Author Topic: Potential add-on board?  (Read 3724 times)

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Offline EugeneNine

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Re: Potential add-on board?
« on: March 06, 2017, 02:51:48 PM »
Quote from: Pat the Cat;823010
The Compute Module has the same form factor as a DDR2 SODIMM, so can be connected to Amiga buses.

Cheap graphics card, other goodies very connectable. Unlike Odroid or Pi.

The form factor is the same but the pinout isn't going to be compatible with any Amiga bus, its simply bringing out the USB and and i/o ports.

I've been wondering though, the (PC) ISA bus was/is pretty slow I wonder if the i/o pins on a Pi were brought out to a latch could it be used to drive ISA cards. There are not enough pins for address and data so it would probably need to mux it like the 8085.  Then we could eventually built a Pi bridgeboard.
 

Offline EugeneNine

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Re: Potential add-on board?
« Reply #1 on: March 07, 2017, 01:24:28 AM »
It looks like ISA via USB is a possibility
https://www.raspberrypi.org/forums/viewtopic.php?t=46841

It looks though like one could bit bang out the GPIO to an ISA card so I'm thinking it should be possible for zorro slots too, espically with the 68k being async.  

I don't have any old cards to test with anymore.