Delta Tau PMAC2 PCI, Hardware Reference Manual

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3U Turbo CPU Board for UMAC Turbo and Turbo Stack
16 Board Jumpers and Pinouts
E20 – E22: Power-Up/Reset Load Source
E Point and
Physical Layout
Location Description Default
E20: C-3 To load active memory from flash IC on power-up/reset,
Remove jumper E20;
Jump E21 pin 1 to 2.
Jump E22 pin 1 to 2.
Other combinations are for factory use only; the board will not
operate in any other configuration.
No E20 jumper
installed
E21 and E22 jump
pin 1 to 2
E23: Firmware Reload Enable
E Point and
Physical Layout
Location Description Default
C-3 Jump pin 1 to reload firmware through serial or bus port.
Remove jumper for normal operations.
No jumper
installed
DIP Switch Block S1: PC Bus Base Address
S1B S1A
4 3 2 1 8 7 6 5 4 3 2 1
OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF
⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑ ⇑
⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ ⇓
ON ON ON ON ON ON ON ON ON ON ON ON
The 12 DIP switches on block S1 (location B-3) set the base address of the Turbo PMAC2-3U on the PC/104 bus. Together
they form a binary number. Each switch, if in the ON (closed) position, sets its bit to 0; if in the OFF (open) position, sets its
bit to 1. The possible base addresses are all multiples of 16, so switch 1 sets a bit value of 16, switch 2 sets a bit value of 32,
and so on.
S1A Switch # Bit Value Default Default Value Your Value
1 16 (10h) OFF (x1) 16 (10h)
2 32 (20h) ON (x0) 0
3 64 (40h) ON (x0) 0
4 128 (80h) ON (x0) 0
5 256 (100h) ON (x0) 0
6 512 (200h) OFF (x1) 512 (200h)
7 1024 (400h) ON (x0) 0
8 2048 (800h) ON (x0) 0
S1B Switch #
1 4096 (1000h) ON (x0) 0
2 8192 (2000h) ON (x0) 0
3 16384 (4000h) ON (x0) 0
4 32768 (8000h) ON (x0) 0
Total Value: 528 (210h)
To set the board to a different bus address, it is best to specify that address in hexadecimal form, because each hex digit
corresponds to four switches. The last hex digit of the base address is always zero.
For example, to set the base address on the PC bus to 992 decimal, or 03E0 hex. The first 0 corresponds to switches 1
through 4 of S1B. All of these should be on to set their bits to 0. The 3 corresponds to switches 5 through 8 of S1A.
Switches 8 and 7 should be on, and switches 6 and 5 should be off to define the 3. The E corresponds to switches 1 through
4. Switches 4, 3, and 2 should be off, and switch 1 should be on to define the E.
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