Specifications

Hardware Configuration
2–5
Table 2–2 Configuration Jumper Summary
Jumper Function On Off 1/2 2/3
W1 Video Controller Enable Enabled Disabled - -
W2 Byte-wide Backup Battery Connected Not Connected - -
W3 SCSI Termination Power Connected Not Connected - -
W4 Serial 3 IRQ Select - No IRQ IRQ4 IRQ12
W5 Serial 4 IRQ Select - No IRQ IRQ3 IRQ10
W6 Serial 1 and 3 IRQ4 Sharing No Share IRQ4 Sharing - -
W7 Serial 2 and 4 IRQ3 Sharing No Share IRQ3 Sharing - -
W8 +5V for External RS-485 (Serial 4) +5 on J13-11 Not Connected - -
W9 BIOS/Byte-wide Chip Select Swap BIOS Chip Byte-wide - -
W10 CPU Frequency Ratio Select 0 1/3 or 2/3 2/5 or 1/2 Do Not Change
W11 CPU Frequency Ratio Select 1 1/2 or 2/3 2/5 or 1/3 Do Not Change
W12 Factory Use Only Factory Only Normal Do Not Add Shunt
W13 BIOS Programming Power (12V) Connected Not Connected - -
W14 Main System Clock Select - 50MHz 60MHz 66MHz
W15 Byte-Wide S0 Configuration See 2.10 Byte-Wide Sockets For Jumper Configurations
W16 Factory Use Only Factory Only Normal Do Not Add Shunt
W17 SCSI Enable - - Enabled Disabled
W18 DRQ for ECP (Parallel Port) - No DRQ DRQ1 DRQ3
W19 DACK* for ECP (Parallel Port) - No DACK* DACK1* DACK3*
W20 Backlight Enable Signal Select - - Optional Standard
W21 Byte-wide Power Selection - - Non SRAM SRAM
W22 Byte-wide Write Enable Enabled Disabled - -
W23 Flat Panel Shift Clock Polarity - - Normal Inverted
W24 Watchdog Timer Output Select - Disabled IOCHCK* Reset