Setting system-board configuration jumpers – IBM 704 User Manual
Page 310
Setting System-Board Configuration Jumpers
Table 14 shows the default SCSI IDs for hot-swap drives.
Table 14. Default SCSI IDs for Hot-Swap Drives
J3
Pins
J4
Pins
Bay 1
or 7
Bay 2
or 8
Bay 3
or 9
Bay 4
or 10
Bay 5
or 11
Bay 6
or 12
1-2
1-2
0
1
10
3
4
13
1-2
2-3
0
1
2
3
4
5
1
2-3
2-3
8
9
2
11
12
5
1
2-3
2
1-2
2
8
9
10
11
12
13
Notes:
1. See “Setting SCSI IDs for External Devices” on page 209 for rules about
setting SCSI IDs for devices.
2. This is the default jumper setting.
Setting System-Board Configuration Jumpers
Table 15 summarizes the settings for the system-board configuration
jumpers.
Table 15 (Page 1 of 2). Configuration Jumper Settings
Jumper
Pins
Description
J6A1, BIOS
Recovery
1-2
1
2-3
Sets BIOS boot block to normal
startup mode.
Enables the BIOS flash memory
recovery mode.
J6A1, BIOS Boot
Block
1-2
1
2-3
Sets the BIOS boot block as
write-protected.
Sets the BIOS boot block as
programmable.
J6A2, Video Sleep
1-2
1
2-3
Sets address of Video Sleep
Register to 03C3H.
Sets address of Video Sleep
Register to 46E8H.
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PC Server 704 User's Handbook