Jumper settings
Table A
−
6 System
configuration jumper: W1
W1 – System Configuration
Label Description
W1
S
System parameters option jumper:
Installed = enable User Setup options*
Removed = enable BIOS Setup default
[1–2]*
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
[3–4]*
V Video
jumper:
Installed = enable on-card video*
Removed = disable on-card video
[5–6]*
U User
jumper
[7–8]*
R
Bios recovery jumper:
Installed = normal BIOS operation*
Removed = allows new BIOS to be installed
[9–10]*
* = default
Table A–7
COM2 jumper: W2
W2 – COM2 jumper
COM Port
Interface
Jumper Settings
RS–422/RS–485
no termination
No jumpers on W2
COM2
RS–422/RS–485
with termination
W2[1–3], W2[2–4]*
* Default. These jumpers terminate the network. If the
XE–800 SBC is not at an end of the network, leave these
jumpers off .
104