From: David Wood (jbevren_at_starbase.globalpc.net)
Date: 2008-11-08 06:34:27
On Fri, 7 Nov 2008, Jim Brain wrote:
[Clip]
>
> As to your inquiry about not being able to drive a 1541 from the AVR, I
> wonder if the AVR cannot sink enough current to overcome the 1KOhm
> pullups in the 1541. It would not be my first thought, but aside from
> protocol concerns, one must consider the electrical portion of the bus.
As for the comment about the AVR overcoming the 1k pullups, the uIEC works
great on my system:
C128D
1571D (8)
Indus GT (11)
1581 (10)
1541 (9)
UIEC (12)
It would seem that the atmega128 can do it. I wonder about the smaller uCs..
>
> Jim
>
-Jbev
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