[Coco] Coco 4

[peak at mail.polarcomm.com]

Ok Neil, Now I have a project to challenge me. I get right on 
that. Lets call it "coco2ISA Bus adapter". Any software like 
drivers or descripters will be left up to you or someone else.
Eric
Not a programmer! 

---- Original message ----
>Date: Tue, 6 Jan 2004 11:03:40 -0800
>From: "Neil Morrison" <neilsmorr at hotpop.com>  
>Subject: Re: [Coco] Coco 4  
>To: "CoCoList for Color Computer Enthusiasts" 
<coco at maltedmedia.com>
>
>
>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
>
>
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