AT&T PC 6300 - Page 594

APPENDIX A: SWITCHES AND JUMPERS
MOTHERBOARD (ROM 1.43) OR HIGHER
SWl SW2 SW3
SW4
*
SW5
SW6 SWT
SW8
I
FUNCTION
0 1
1 1
X X
X
1
128-KB Total RAM
on Motherboard
1
0
1
1 X X
X
0
256-KB Total RAM
on Motherboard
1 '
1
0
1 X
X
X
0
512-KB Total RAM
(256 on Motherboard
256 on Exp. Board)
1
1
1
0 X
X
X
I
512-KB Total RAM
on Motherboard
512-KB Bank 0
0-KB Bank 1.
0 1 0
1 X
X
X
0
640-KB Total RA.M
(256 on Motherboard
384 on Exp. Board 1
0 1 0
0 X
X X
0
640-KB Total RAM
on Motherboard
128-KB Bank 0
512-KB Bank 1
0 1
1 0 X
X
X
0
640-KB Total RAM
on Motherboard
512-KB Bank 0
128-KB Bank 1
X
X X
X 1
X
X
X
8087 NOP not present
X
X X
X 0
X
X
X
8087 NOP present
X
X X
X X
1
X
X
8250 ACE (Async.
Comm. Element)
present
X
X X
X X 0
X
X
Z8530 see present
•SW4 1 — 256-K bit RAM chips not used
0 — 256-K bit RAM chips used
tSW8 1 — Motherboard Bank 1 Empty
0 — Motherboard Bank I Full
ON=CLOSED=l
OFF=OPEN=0
NO SETTING REQUIRED=X
Figure A-6. Switch Settings for DIPSW-0 (ROM 1.43)
A-12
n
n
0
G
D
0
n
n
0
n
n-
G
n
n
0
n
0.
n