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Did any 8080 based S-100 cards use DMA?

Dwight Elvey

Veteran Member
Joined
Jun 21, 2003
Messages
4,736
Location
Santa Cruz
The original The Digital Systems disk drive controller did DMA. In fact,
one didn't even need any ROM in the system. On reset it would load
track0 into RAM and that would have a bootstrap to bring the rest of the
code for something like CP/M. I use it this way myself. It didn't use
any special DMA controller. It worked all off the state machine in the
controller ( all TTL with PROM control of the state engine ).
The S100 memory is 100% RAM.
Dwight
 

rorypoole

Veteran Member
Joined
Dec 8, 2004
Messages
585
Location
UK, Surrey
I thought the DMA controller was on the CPU or ram card, but it is on the peripheral card's!
Thanks for the info
 
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