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Jumpers/Switches/Controls Jumpers and Switches:
 BIOS Drive 1 Drive 0 Formatted
Table SW1-1 SW1-2 SW1-1 SW1-2 Capacity Heads Cyls Pre-Comp RWC
 0 CLOSE CLOSE CLOSE CLOSE 20 MB 4 612 none (613)
none (613)
1 OPEN CLOSE OPEN CLOSE 10 MB 2 612 128
128
2 CLOSE OPEN CLOSE OPEN 20 MB 4 612 128
none (613)
3* OPEN* OPEN* OPEN* OPEN* 10 MB 4 306 ALL (0)
none (613)
 * Factory setting  Position Status State
 SW1 - 8 OPEN Reserved for BIOS ROM
SW1 - 7 OPEN Reserved for BIOS ROM
SW1 - 6 OPEN Reserved for BIOS ROM Virtual option
SW1 - 5 OPEN Reserved for BIOS ROM Auto-Config option
 Pin Connectors
Jumper Status
 W1 2 - 1 NORMAL*
2 - 3 Factory test only
W2 2 - 1 NORMAL*
2 - 3 Factory test only
W3 CLOSED BIOS ROM enabled*
OPEN BIOS ROM disabled
W4 2 - 3 Device address 320H*
2 - 1 Device address 324H
W5 2 - 1 BIOS ROM SIZE 32 KB or 64 KB**
2 - 3 BIOS ROM SIZE 16 KB
W6 2 - 3 Reduced Write Current (8 heads)*
2 - 1 Head Sel 3 (16 heads)
W7 2 - 1 INTRQ to INTRQ 5 on host connector**
2 - 3 INTRQ to INTRQ 2 on host connector
 * As shipped jumper installed ** As shipped Instead of jumpers, pins 1 & 2 are joined via an etch on the PCB |
