[Coco] [Color Computer] Disto Super Controller II

[jdaggett at gate.net]

Mike

The Disto SCII board used the same WD1773 Floppy disk 
controller. Main difference in the Floopy controll section is that there 
is a 2K buffer and the disk controller runs in buffered mode.  There 
is logic that allows the disk controller to read/write the buffer instead 
of the CPU having to read/write a byte at a time. ALso the IRQ from 
the disk controller is mapped to the 6809's IRQ instead of the MNI. 

Also there are other components and logic to form a 17 bit 
expansion bus to include a parallel port compatible to the 
Centronics port, real time clock and other expansion. 

To recreate it  you are still locked into the limitations of the WD1773 
disk controller. ONe would be better to build around the WD 2973 
contrroller chip rather than the 1773.

james 

On 29 Nov 2005 at 20:18, Mike Pepe wrote:

To:             	ColorComputer at yahoogroups.com
From:           	Mike Pepe <lamune at doki-doki.net>
Date sent:      	Tue, 29 Nov 2005 20:18:22 -0500
Copies to:      	Subject:        	[Coco] [Color Computer] Disto Super Controller II
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> Does anyone own one of these controllers?
> 
> I'm looking to borrow/rent one to see how it works, and possibly make
> something compatible with it.
> 
> thanks
> 
> -Mike
> 
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