[Coco] Coco 4
peak at mail.polarcomm.com
peak at mail.polarcomm.com
Wed Jan 7 15:29:31 EST 2004
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.
>> 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
>> As long as we are talking about an older style 8-bit ISA
>> How you ask? Very similar to the way peter stark did it on
>> "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
>> 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.
>> >----- Original Message -----
>> >From: <jdaggett at gate.net>
>> >> Neil
>> >> I invision a mother board type layout using micro ATX
>> >> Maybe with PCI type slots and headers to plug in for
>> and floppy
>> >> drives. Maybe able to package in a reagular PC case
>> PS2 style
>> >> mouse and keyboard.
>> >> just some wild ideas
>> >> james
>> >Coco mailing list
>> >Coco at maltedmedia.com
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>> Coco at maltedmedia.com
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