Maintenance and Service Guide
8-15
Table 8-10. Shunt Jumper and Switch Settings for the Multipurpose Fixed Disk
Drive Controller Board (assy. no. 000336-001 and -021)
Jumper or
Switch Position
Function
Switch Setting
J1
1
(Shunt Jumper)
Asynchronous
communication
Open connectors on left—serial
interface COM1 IRQ4 (default)
Open connectors on right—serial
interface COM2 IRQ3
J2
1
Controller address
Open connectors on left—primary
diskette controller address (default)
Open connectors on right—
secondary diskette controller address
Switch 1-1
Fixed disk drive
ON = Enable
OFF = Disable
Switch 1-2
Parallel printer port
ON = Enable (default)
OFF = Disable
Switch 1-3
2
Serial port
ON = Enable (default)
OFF = Disable
Switch 1-4
Reserved
OFF
1
To change the setting, remove the shunt jumper from its socket, rotate it 180 degrees, then reinstall it in
the socket.
2
Reserved on 000336-001 Rev. P or earlier.
Summary of Contents for Deskpro 386 - Desktop PC
Page 1: ...COMPAQ DESKPRO 386 Personal Computer MAINTENANCE AND SERVICE GUIDE ...
Page 2: ......
Page 16: ......
Page 24: ......
Page 26: ......
Page 46: ......
Page 48: ......
Page 58: ......
Page 90: ......
Page 92: ......
Page 130: ......
Page 132: ......
Page 156: ......
Page 254: ......
Page 256: ......
Page 276: ......