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Vector ZCB Single Board Computer
2'.3.4
2732 EPRCM Addressing
To use 2732's in the ZCB, follow the procedure outlined below.
1) Consult the 2732 Base Address Chart.
This shows the base addresses
allowable with 2732's.
2732 Base Address Chart
Addresses
OOOOH-7FFFH
8000H-FFFFH
Area H Jumpers
1-2-3,3-'9
1-2-3,3-8
Area I Jumpers
8-3,7-2,6-1
8-3,7-2,6-1
Area J Jumpers
3-4,1-7
3-4,1-7
2) With the base address chosen, jumper areasH, I and J as per the 2732
chart and cut away the old jumpers.
3) Subtract the base address fran the absolute address desired to find the
relative address.
Consult the 4K column of the Relative Address Chart to
find the appropriate Area F pad number.
4) Consult the Area F EPRCM/RAM Socket Pad Chart.
5) Solder jumper(s) as required in Area F.
6) Cut away any pre-existing jumpers as necessary.
Note: The lK of on-board RAM will now occupy 4K of address space.
The first
lK will be PJPulated, the remaining 3K, blank.
2.3.5 Enable on board EPRCM on boot
Jumper area
B
Connections as manufactured: jumpered
Function:
Optionally causes processor to address the first 3 bytes of EPROM
on system start up (boot) or reset.
Generally, the first 3 bytes of the
EPROM are a jump instruction to the fourth byte on the EPRCM.
The board is
shipped with this option enabled.
Options:
to disable this option, cut the jumper between both pads.
2-6
Rev. I-B
6/11/80
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