INTERLOGIC INDUSTRIES SC486DX Processor 80486DX Processor Speed 33MHz Chip Set OPTI Max. Onboard DRAM 32MB Cache 64/256KB BIOS Award Dimensions 350mm x 125mm I/O Options Bus mouse port, floppy drive interface, IDE interface, parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Auxiliary keyboard CN1 IDE interface CN9 Power LED & keylock CN2 Parallel port CN10 Speaker CN3 External battery CN11 Reset switch CN4 Serial port 1 CN12 IDE interface LED CN5 Bus mouse port CN13 Turbo switch CN6 Serial port 2 CN14 Turbo LED CN7 Floppy drive LED interface LED Floppy drive CN8 interface USER CONFIGURABLE SETTINGS Function Jumper Position » Bus speed select ATCLK/4 (5.5 JP1 Closed MHz) Bus speed select ATCLK/6 (8.5 JP1 Open MHz) » Factory configured - do not alter JP5 pins 2 & 3 (selects iOSC/2) closed » Watchdog Timer mode select system JP9 pins 1 & 2 reset after time-out closed Watchdog Timer mode select low JP9 pins 2 & 3 IOCHK# NMI after time-out closed Watchdog Timer mode select JP9 Open disabled » Floppy drive interface enabled JP10 pins 1 & 2 closed Floppy drive interface disabled JP10 pins 2 & 3 closed » Hard drive controller enabled or JP11 pins 2 & 3 installed closed Hard drive access disabled JP11 pins 1 & 2 closed » IDE interface enabled JP12 pins 1 & 2 closed IDE interface disabled JP12 pins 2 & 3 closed » Bus mouse interrupt select IRQ5 JP13 pins 1 & 2 closed Bus mouse interrupt select IRQ4 JP13 pins 3 & 4 closed Bus mouse interrupt select IRQ3 JP13 pins 5 & 6 closed Bus mouse interrupt select IRQ9 JP13 pins 7 & 8 closed Bus mouse interrupt select none JP13 Open (disabled) » CMOS memory normal operation JP14 pins 1 & 2 closed CMOS memory clear JP14 pins 2 & 3 closed » Serial port 1 select COM1 (I/O JP15 pins 1 & 2 address 3F8-3FFh) closed Serial port 1 select COM3 (I/O JP15 pins 2 & 3 address 3E8-3EFh) closed » Serial port 1 enabled JP16 pins 1 & 2 closed Serial port 1 disabled JP16 pins 2 & 3 closed » Parallel port enabled JP17 pins 1 & 2 closed Parallel port disabled JP17 pins 2 & 3 closed » Serial port 2 enabled JP18 pins 1 & 2 closed Serial port 2 disabled JP18 pins 2 & 3 closed » Serial port 2 select COM2 (I/O JP19 pins 1 & 2 address 2F8-2FFh) closed Serial port 2 select COM4 (I/O JP19 pins 2 & 3 address 2E8-2EFh) closed » Bus mouse port enabled JP20 pins 1 & 2 closed Bus mouse port disabled JP20 pins 2 & 3 closed » Serial port 2 interrupt select JP21 pins 1 & 2 IRQ3 closed Serial port 2 interrupt select JP21 pins 2 & 3 IRQ4 closed » Serial port 1 interrupt select JP22 pins 1 & 2 IRQ4 closed Serial port 1 interrupt select JP22 pins 2 & 3 IRQ3 closed » Parallel port interrupt select JP23 pins 1 & 2 IRQ7 (LPT1) closed Parallel port interrupt select JP23 pins 2 & 3 IRQ5 (LPT2) closed » Parallel port select LPT1 (I/O JP24 pins 1 & 2 address 378-37Fh) closed Parallel port select LPT2 (I/O JP24 pins 2 & 3 address 278-27Fh) closed » Watchdog Timer interval select JP25 Closed 500ms Watchdog Timer interval select 1 JP25 Open second » Monitor type select color JP26 Closed Monitor type select monochrome JP26 Open DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (4) 1M x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M x 9 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 TAG (U31) 64KB (8) 8K x 8 (1) 8K x 8 256KB (8) 32K x 8 (1) 32K x 8 Note:The location of the TAG is unidentified and may not be present on some revisions. CACHE JUMPER CONFIGURATION Size JP2 JP3 JP4 64KB Open Open Open 256KB Closed Closed Closed CPU TYPE CONFIGURATION Type JP6 JP7 JP8 80486SX Open N/A pins 2 & 3 closed 80487SX Closed pins 2 & 3 pins 1 & 2 closed closed 80486DX Closed pins 1 & 2 pins 1 & 2 closed closed