Chapter 2 - Installation
8
S t e p 1 S e t S w i t c h a n d J u m p e r O p t i o n s
S t e p 1 S e t S w i t c h a n d J u m p e r O p t i o n s
Set all user-configurable jumpers and switches, and install coprocessors before installing the motherboard in the chassis. There is one
user-configurable switch and ten jumpers.
S W 1
S W 1
SW1 is an two-position DIP switch. See the graphic on page 6 for the location of SW1.
S w i t c h
S w i t c h
D e s c r i p t i o n
D e s c r i p t i o n
1
Diagnostics is used for manufacturing diagnostics. The
motherboard is shipped with this switch Off. The switch
should remain Off.
2
COL/MONO sets the type of video display adapter card in the
system. This switch is factory-set to Off, for a monochrome
display adapter (MDA
). Set On for a color graphics adapter
(CGA
). This switch has no effect on EGA® and VGA®
adapters.
J 1 0 0
J 1 0 0 C a c h e S i z e S e l e c t
C a c h e S i z e S e l e c t
J100 is a two-pin single-inline berg that selects the cache size. Place a shorting bridge on pins 1-2 (CLOSED) if 128 KB of cache
memory is installed. Remove the shorting bridge (OPEN) if 64 KB of cache memory is installed.
