Table A–8
System configuration switches, Switch 4
System configuration switches, Switch 4
Label Description
Position
S
System parameters option switch:
1
On = enable User Setup options*
Off = enable BIOS Setup default
2
X
BIOS extension enable
Installed = enable extended BIOS*
allows use of INT17 calls without
loading I17HNDLER.EXE
Removed = disables extended BIOS
frees location D8000 - DFFFF
V Video
switch:
3
On = enable on-card video*
Off = disable on-card video
U1
User switch 1, default On*
4
R
BIOS recovery jumper:
5
Installed = normal BIOS operation*
Removed = allows new BIOS to be installed
* default
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