Multibus cards in 3000 series

[Dennis Linse]

We have a 3020 that we are using as part of our own fixed-base flight
simulator.  Part of the simulation requires analog/digital conversion
of pilot stick and rudder inputs.  Our current set-up uses a Multibus
A/D card in a separate card cage that is interfaced to a PC.  The PC
accesses the card using i/o port commands (e.g. port[i] in Turbo
Pascal) and sends the data to the 3020.

Since the 3020 is a Multibus machine, we would like to just slip the
A/D card (an Intel iSBC 711 card) into an empty slot of the 3020 and 
'make it work'.

Can anyone offer any hints about the feasibility of this from the
hardware and/or software point of view?

I've RTFM (that we have) and came up with two entries that seem to
indicate it is possible.  The first is autoconf(7) which show if an
installed Multibus card is recognized and at what I/O address it is
running.  The second is ip2mapio(2) which would allow the Iris to access
the Multibus i/o space (the A/D card we have is I/O addressed rather
than Memory addressed).  If I could just slipped the card in and have it
recognized, the ip2mapio function appears to allow me to get at the card
from a program, but it gives no indication where to go from there.  I
would like something as simple as the port command on the PC but would
take any solution.

Please mail me any help you might be able to offer.  I will post a
summary of any responses if there is any interest shown.

Thanks,

Dennis Linse  (djlinse at phoenix.princeton.edu)
"The right to do something does not mean that doing it is right."
                                         -- William Safire