Specifications

Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER # DESCRIPTION
W44-45(A,B),
W49(A,B)
These three jumpers select the chip size
to be used in the EPROM socket 5D1.
The memory address space occupied by
the EPROM is determined by the jumper
assignments W57-W59, which must also
be selected for proper operation. Socket
3D1 occupies the lower half (if
containing EPROM) and socket 5D1 oc-
cupies the upper half of the on-board
EPROM address space. The following
table shows the jumper assignments ac-
cording to chip size.
CHIP SIZE JUMPER IN JUMPER OUT
16 Kbyte W44A, W45A, W49A W44B, W45B, W49B
32 Kbyte W44A, W45B, W49A W44B, W45A, W49B
†† 64 Kbyte W44B, W45B, W49A W44A, W45A, W49B
128 Kbyte W44B, W45B, W49A W44A, W45A, W49B
†256 Kbyte W44B, W45B, W49B W44A, W45A, W49A
A-32