kropf@iam.unibe.ch (Peter Kropf) (01/06/88)
Does anybody know a Transputer Board with a QBUS Interface ? It would be
a great help for us, if anybody could give us a hint whether such a board
exists or whether anybody else is interested in such a board or constructing
one
Thanks, Peter Kropf
Univ. Berne, Switzerlnad
kropf@iam.unibe.ch
or u06k@cbebda3t.bitnetandy@TCGOULD.TN.CORNELL.EDU (Andy Pfiffer) (01/07/88)
FPS (Floating Point Systems) makes a Q22 bus board (for uVaxen) that contains a T414-15 and 64K of RAM. I believer there is room on board for EPROMS, although our board doesn't have any. 3 of the T414's links are brought out to differential-drivers (CSA and T-Series compatible). The fourth link is connected to a link adaptor that sits on the QBUS. Data can be transferred to and from the T414 through the link adaptor and through a DMA controller visible only from the T414 side. Along with some misc. 2-way status bits there are also interrupt lines in each direction. There are also some control lines that are programmable from the T414 side that are meant to connect to an FPS T-Series machine. However, the link adaptor is NOT interrupt driven -- the data ready bits (in and out) must be polled from the QBUS side. (The overhead for servicing a byte-by-byte interrupt is VERY high on a uVax). All-in-all, its a pretty nifty board. If you can get FPS to sell you one (make SURE you get the hardware manual), it might be just what you need. I believe that FPS calls it their "T-Series Q22 Interface Board." We use our own homebrew driver (Mt. Xinu 4.3 and local software in the T4) to treat the 3 available links as directly connected link adaptors. Andy
ron@topaz.rutgers.edu (Ron Natalie) (01/09/88)
I can say little to recommend Floating Point Systems as a result of eight years of dealing with the company. They are corporate scum and the support service is suboptimal. -Ron
ram%shukra@Sun.COM (Renu Raman, Sun Microsystems) (01/09/88)
In article <17318@topaz.rutgers.edu> ron@topaz.rutgers.edu (Ron Natalie) writes: >I can say little to recommend Floating Point Systems as a result of >eight years of dealing with the company. They are corporate scum >and the support service is suboptimal. > >-Ron The Dec 17 issue of Electronics talks about (pg 26), A Caplin Cybernetics Corp's QT0 - which is an interface to Q-bus (configurable to 5/10/20 Mb/s) which works with their QT4 that can take up 4 T414 or T800s. The QT0 costs around 1800$ and QT4 with 4 transputers cost ~$6000. --------------------- Renukanthan Raman ARPA:ram@sun.com Sun Microsystems UUCP:{ucbvax,seismo,hplabs}!sun!ram M/S 5-40, 2500 Garcia Avenue, Mt. View, CA 94043