On 11/19/2017 9:08 AM, emanuel stiebler wrote:
On 2017-11-18 23:48, Jim Brain wrote:
> Looking at the schematic for the ECB, I cannot find any description of
> the signals BAI, BAO, IEI, and IEO. Can anyone shed some light on the
> function of these signals?
Here again:
https://en.wikipedia.org/wiki/Europe_Card_Bus
I have some ECB documentation "somewhere", but I'm moving so it is in
one of the 100s boxes somewhere :(
But the guys on the retrobrewcomputers can help you for sure.
And yes, I like ECB, it was small & simple, you still can get boards
for it, and the DIN conectors I still use ...
I went there already, but the descriptions:
*BAI 1; BAO 1:* Bus Priority In; Bus Priority Out.
*IEI; IEO:* Interrupt Enable In; Interrupt Enable Out.
does not give much clue as to usage, especially as I see that the pins
are unwired on the backplanes, and require ones to add jumpers to
connect them. I understand that they are used to "chain" boards
toghether in some order, but how and why is left as an exercise for the
reader.
I looked at each of the backplane schematics for guidance, as well as
looking at various ECB cards (the interrupt card I thought would have
more detail, but alas, not)
Jim
--
Jim Brain
br...@jbrain.com
www.jbrain.com
