MITS 2SIO serial chip?

From: Ben Franchuk <>
Date: Tue Dec 18 15:12:03 2001

Allison wrote:
> It's possible to find WD FDC drivers around but they will be very machine
> specific more often than not.
But then I find 6800/6809 code more readable than "You Know Who"
This will be simple polled loop with interrupts disabled regardless
of what chip I use. I would love to have had DMA but I ran out resources
for it. In fact DMA is rather messy as I don't tri-state the address bus
and would have to stop the CPU for a free memory cycle. If I was doing
on a I/O card I most likely would have a sector buffer their rather than
> Allison

Ben Franchuk --- Pre-historic Cpu's --
Received on Tue Dec 18 2001 - 15:12:03 GMT

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