[Coco] Coco 4

[peak at mail.polarcomm.com]

Yep
Burke's cocoxt did "interface" to an ISA HD controller card.
However, I was thinking of a more general ISA bus.
Now, of course we cant really squeeze all of a PC's 1Meg 
memory plus it's 64k I/O into a coco's address space but 
since a lot of those ISA cards only used about 4each port for 
one function we CAN fit some of them.
Coco's SCS gives us 32 bytes to play with. 32 divided by 4 
would give us 8 4-port devices. Also some of the ISA 
controller cards used 8k memory for HD BIOS. So the only 
thing we have to do is "Re-Map" the memory and I/O addresses 
into cocos CTS(memory) and SCS(I/O) spaces. This would be 
easier if there was a real standard for I/O ports on a PC.
The sort-of Defacto standards will just have to be sufficient 
and any ISA cards which we use will need to be examined to 
determine thier port addresses. If anyone knows of an ISA bus 
multifunction card with HD,FD,Parralell,2 serial or so please 
let me know. We should probably take a look at several 
different ones and come to a general consensus about what 
ports to use for what!  

---- Original message ----
>Date: Tue, 6 Jan 2004 15:18:33 -0500
>From: <jadonaldson at charter.net>  
>Subject: Re: Re: [Coco] Coco 4  
>To: CoCoList for Color Computer Enthusiasts 
<coco at maltedmedia.com>, CoCoList for Color Computer 
Enthusiasts <coco at maltedmedia.com>
>
>  If you look at the Burk & Burk interface, it interfaced
>to 8 bit ISA Hard Drive interfaces. 
>
>John Donaldson
>> 
>> From: peak at mail.polarcomm.com
>> Date: 2004/01/06 Tue PM 01:18:53 EST
>> To: CoCoList for Color Computer Enthusiasts 
<coco at maltedmedia.com>
>> Subject: Re: [Coco] Coco 4
>> 
>> Well Neil,
>> an ISA bus slot is really not to difficult to add to a 
coco.
>> As long as we are talking about an older style 8-bit ISA 
bus!
>> How you ask? Very similar to the way peter stark did it on 
his
>> "PT-68K". See Radio Electronics magazine January thru 
>> September 1988!
>> 
>> 
>> ---- Original message ----
>> >Date: Mon, 5 Jan 2004 15:54:25 -0800
>> >From: "Neil Morrison" <neilsmorr at hotpop.com>  
>> >Subject: Re: [Coco] Coco 4  
>> >To: "CoCoList for Color Computer Enthusiasts" 
>> <coco at maltedmedia.com>
>> >
>> >
>> >I _REALLY_ wanted to use ISA boards for I/O etc. because 
>> they are so
>> >cheap, but translating the addresses etc. just looked 
like 
>> too much
>> >of nightmare. Too bad because a HD/FD 1 parallel/2 serial 
>> board is
>> >around $10 IIRC. I figure a nice little horizontal 
>> case/power supply
>> >would be useable, however.
>> >
>> >Neil
>> >
>> >----- Original Message ----- 
>> >From: <jdaggett at gate.net>
>> >
>> >
>> >> Neil
>> >>
>> >> I invision a mother board type layout using micro ATX 
form 
>> factor.
>> >> Maybe with PCI type slots and headers to plug in for 
IDE 
>> and floppy
>> >> drives. Maybe able to package in a reagular PC case 
with 
>> PS2 style
>> >> mouse and keyboard.
>> >>
>> >> just some wild ideas
>> >>
>> >> james
>> >
>> >
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>> 
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