1260-00C User Manual
Operation 3-8
the possible EPROM memory configurations. Bank 2 has a base
address of E80000h, and Bank 3 starts at EC0000h. The
maximum EPROM expansion memory size is 512 kilobytes.
Table 3-5. Expansion EPROM Configurations
EPROM
Size
BANK 2
(U47, U55)
BANK 3
(U53, U59)
S11
S14
S10
S13
End
Address
16K
2764
None
OFF
OFF
OFF
OFF
E83FFFh
32K
27128
None
OFF
OFF
OFF
OFF
E87FFFh
64K
27256
None
OFF
ON
OFF
OFF
E8FFFFh
128K
27512
None
ON
ON
OFF
OFF
E9FFFFh
256K
27010
None
ON
ON
OFF
OFF
EBFFFFh
272K
27010
2764
ON
ON
OFF
OFF
EC3FFFh
288K
27010
27128
ON
ON
OFF
OFF
EC7FFFh
320K
27010
27256
ON
ON
OFF
ON
ECFFFFh
384K
27010
27512
ON
ON
ON
ON
EDFFFFh
512K
27010
27010
ON
ON
ON
ON
EFFFFFh
When inserting EPROMs into the expansion EPROM slots, orient
them according to the silkscreen printed on the board, as shown in
Figure 3-1. The 2764, 27128, 27256 and 27512 EPROMs have
fewer pins than the expansion sockets. In these cases, align the
bottom pins of the EPROM with the bottom pins of the socket,
leaving the top pins open, as illustrated in Figure 3-5.
WARNING
Improper EPROM installation can result in damage to the
EPROM, 1260-00C, or both
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