DAP 610 Looking For A New Home

From: Innfogra_at_aol.com <(Innfogra_at_aol.com)>
Date: Wed Dec 3 14:29:30 2003

In a message dated 12/3/03 12:16:03 PM Pacific Standard Time,
ard_at_p850ug1.demon.co.uk writes:


> At the back is a single slot (looks to be VME, but I wouldn't put
> money on it) contains a parallel interface card that links to a DR11-W
> type interface in the host. Not SCSI. Maybe some later ones were SCSI,
> though

Tony is right. SCSI is for a Sun connection. VAX is different. Following is
more from the referenced docs:

Each node of the machine effectively consists of a single bit processor,
optional floating point accelerator and node memory.

The DAP 510 is small enough to fit under a desk, while the DAP 610 is housed
in a standard EIA rack cabinet. Both DAP models can be hosted by Sun or DEC
VAX computers and workstations.

The DAP can be connected to a Sun host via the SCSI interface. Connection to
DEC VAX systems is via DR11W or DRB32 interfaces. Connection to the Aptec IOC
is supported as well as direct connection to VME bus.

                       DAP 510 DAP 610
Array size 32 x 32 64 x 64
Array memory 8 Mbytes 16 Mbytes (max. of 128 or 512
Mbytes)
Code store 512 Kbytes 512 Kbytes (max. of 4 Mbytes)
Instruction rate 10 MHz 10 MHz
host Sun or VAX Sun or VAX
Size 17 x 13 x 20 in. 45 x 25 x 38 in.

The present DAP systems are third-generation machines which started with a 64
x 64 array originally installed at QMC (Queen Mary College, University of
London). The QMC machine, which had an effective cycle time of 250 nsec, proved
highly adaptable to a wide range of numerical problems based on partial
differential equations. The performance on large-scale Monte Carlo simulations in
lattice gauge theory and molecular dynamics was found to be exceptional and, in
some specialized applications such as the Ising model, the DAP outperformed a
CRAY-1 by a factor of 10.
Received on Wed Dec 03 2003 - 14:29:30 GMT

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