[Coco] atari USB device

[David Hazelton]

James~
	Not looking to deeply in it, Would you put code in a Rom that would be
read on startup to check for keyboard mouse and joystick on USB line and
  if found would over take over the keyboard and joystick functions in
DECB.  I would think that that would be adequate for DECB. In OS9 and
Nitro different drivers would be loaded,  for those USB devices which
are SCF type and that a RBF driver for USB drives (sort of like the
CompactFlash)can be added....Did I miss any other type of USB device
that  would be useful on a Coco?

~David Hazelton


jdaggett at gate.net wrote:
> Mark 
> 
> You can do it two or three address spaces and a 256 byte receive 
> and transmit buffer to implement this. It can be done via a 
> cartdtidge or a memory mapped internal board.
> 
> You can do a flip flop like the old SAM chips where a write to the 
> odd address sets the "A0" line and a write to the even address 
> clears "A0" line. The third location is bidirectional address/data to 
> the SL811.
> 
> What impacts the glue logic will be how many bytes used to 
> communicate to the chip. I suggest that an I/O mapping be used 
> and placed within the $FF00 to $FF7F range. 
> 
> james
> 
> 
> On 17 Nov 2004 at 20:49, Mark McDougall wrote:
> 
> Date sent:      	Wed, 17 Nov 2004 20:49:12 +1100
> From:           	Mark McDougall 
> <msmcdoug at optushome.com.au>
> Organization:   	Technetium Development Pty Ltd
> To:             	msmcdoug at optushome.com.au,
> 	CoCoList for Color Computer Enthusiasts 
> <coco at maltedmedia.com>
> Subject:        	Re: [Coco] atari USB device
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> msmcdoug at optushome.com.au,
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>>Mark McDougall wrote:
>>
>>
>>>Surely cartridge space?
>>
>>Hmmm, only appears to use 2 bytes of address space!?!
>>
>>
>>-- 
>>|              Mark McDougall                | "Electrical Engineers
>>do it | <http://members.optushome.com.au/msmcdoug> |   with less
>>resistance!"
>>
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