Ideas for a simple, but somewhat extendable computer bus
holger.veit at iais.fraunhofer.de
Mon Nov 20 05:20:17 CST 2017
Am 19.11.2017 um 16:08 schrieb emanuel stiebler via cctalk:
> 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:
> 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 ...
ECB is, like many similar approaches, basically Intel world, i.e. 8085,
8088, Z80 (ok, that's Zilog). It is rather tricky
to adapt to the 6xxx (6502/68xx) world; and given the former Kontron et
al socienty, it was basically used for a Z80 line
of CPU and peripheral boards, not much else.
To add another idea, why not run the IBM-XT bus on the DIN41612
connector? This is to avoid the card edge connectors.
Use A+C with the classic 62 pins of the XT connector (2 are unused), and
add the B pins in case to extend to the AT bus.
While the XT bus is also Intel world, it has been already successfully
used for 68xx (6809) multiprocessing. Read
http://www.bradrodriguez.com/papers/ (section "Multiprocessing for the
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