mark@aoa.UUCP (Mark Reynolds) (07/20/87)
[This is reposted from comp.sources.wanted since it could not
seem to get to me any other way.... -- sob]
About nine months ago I successfully modified a driver for the IKON
parallel board so that it would run on a Sun/2 ( hurrah! ). IKON is
a truly marvelous company ( in my opinion ) which makes DR11-W
emulator boards for everything under the sun.
I am now faced with attempting to port this driver again, this time to
a MASSCOMP machine. The driver opens, closes and ioctls just fine, but
staunchly refuses to DMA in either direction. Further examination
shows that reading the CSR from the kernel always gives unintelligible
garbage.
Things I have tried:
(1) checking my register locations very carefully;
(2) various byte-swapping schemes using the dip switches on
the board and/or in software;
(3) various kernel printfs.
I have not yet tried to extend the Multibus and actually look at the
signals. I have tried to contact the Masscomp User's group by mail,
without success.
Anyone out there with any experience with the Multibus IKON board, or
with writing MASSCOMP device drivers, or both, please help! This is
an urgent project ( turning into a raw nerve... ). Anyone who would
like to give us ( sell us ) such a working driver, offer advice, heap
scorn on my foolishness, or otherwise, please mail me. Thank you in
advance.
Multibus is a trademark of Intel Corporation;
MASSCOMP is a trademark of Massachusetts Computer Corporation;
IKON is a trademark of IKON.
I am not affiliated with any of them.
Mark C. Reynolds
...!{harvard,ima}!bbn!aoa!mark
...!{wjh12,mit-vax}!biomed!aoa!mark
[Do you have a copy of the Device Driver Manual? It really helps with
this kind of stuff. -- sob]harry@rainy.atmos.washington.edu (Harry Edmon) (07/21/87)
We are also having difficulties with an Ikon DR11W board in our Masscomp talking to a DR11W in a Prime. If anyone can help, please send mail to harry@rainy.atmos.washington.edu. -- Harry Edmon UUCP: harry@rainy.atmos.washington.edu or (206) 543-0547 uw-beaver!geops!rainy!harry Department of Atmospheric Sciences University of Washington BITNET: 24440@UWACDC
trejo@nprdc.arpa (Len Trejo) (07/21/87)
I'm 87.5 percent sure that the custom products engineering group at Masscomp has already written an Ikon DR11W-emulator driver, which has been used, I hear, to control special purpose graphics processors, such as a Lexidata Lex-90. Mitch Kuninsky there might be able to help you; Brian Rich also. You can reach them at (800) 992-5000. If the driver has already been written, the price shouldn't be too exorbitant. I'd like to know if you do get your driver running. I'd be particularly interested to know if you can support burst DMA mode (no bus arbitration between each DMA word transfer) and what DMA transfer rates you can attain. Len Trejo