In a message dated 12/3/03 12:16:03 PM Pacific Standard Time, ard(a)p850ug1.demon.co.uk writes: 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.