Scsi Memory Address Register; Jumper List (Defaults) - Performance Computer PT-VME151A User Manual

SCSI Memory Address Register

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
31-0

Jumper List (Defaults)

This section provides a summary of the jumpers on the PT-VME151A/151AE and their default settings.
JUMPER
K1
K2
K3 & K11
K4 & K10
K5
K6
K7
K8
K9
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Address 0E000000h
Write Only
SMAR The SCSI Memory Address Register is written with the starting address for a
SCSI DMA transfer. The register retains its value after reset and is unde-
fined after power up
DEFAULT FUNCTION
(Shorted pins)
1 to 2
all open
K3-8 to K3-9
K3-5 to K3-6
K3-2 to K3-3
K11 all open
K4-26 to K4-27
K4-20 to K4-21
K4-16 to K4-17
K4-11 to K4-12
K4-7 to K4-8
K4-5 to K4-6
K4-2 to K4-3
K10 all open
all open
1 to 2
all open
1 to 2
1 to 2
Extensible Single Board Computer/Controller User's Manual 67
SMAR[31-0]
Disables Watchdog Reset
MMU Disable (for MC68040 only)
U38 ROM/PROM/SRAM socket configuration
64Kx8, 28 pin PROM/ROM device
U23 ROM/PROM socket configuration
64Kx8, 28 pin PROM/ROM device
Reserved (factory configured)
SCSI Term Power select (1-2 = local, open = SCSI bus)
Reserved (factory configured)
4Mb/16Mb DRAM select (1-2 = 4M, factory configured)
4Mb/16Mb DRAM select (2-3 = 16M, factory configured)
Performance Computer