[Coco] Coco 4

[Neil Morrison]

I hadn't even considered DMA. The no-halt design of some controllers
would be nice however.

Neil

----- Original Message ----- 
From: <peak at mail.polarcomm.com>


> The memory of an ISA card would be decoded using coco's CTS
> line and the I/O using coco's SCS line. If you really want an
> ISA card adapter for the coco I will see if I can design one
> at least as far as a schematic diagram. Warning* I wont even
> attempt using DMA though**. The hardware part of an ISA card
> adapter for 8-bit ISA cards that dont use DMA should not be a
> problem. I have been wanting to do this anyway.
> Note: Many ISA cards need a 14.318Mhz signal.
> The coco1 and coco2 have this frequency but coco3 does not.

> Eric