
Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER #
DESCRIPTION
W40-W42,
W43 (A,B)
Assign these jumpers to configure socket
3D1 for the proper chip type installed. Refer
to Figure A-10 on page A-31. The memory
address space allocated for this socket is
assigned according to jumper assignments
W55-W59.
Factory
default
assigns
a
128 Kbyte EPROM
for an STD
DOS
EPROM drive to socket 3D1.
For STD
ROM systems, factory default assigns a
64 Kbyte EPROM to socket 3D1. Socket
3D1 loaded at the factory is not a standard
option.
W40-W43
Function
See Fig. A-10
†STD DOS–Configure socket 3D1 for
128 Kbyte EPROM drive
See Fig. A-10
††STD ROM–Configure socket 3D1 for
64 Kbyte EPROM drive
A-30