DEICO ELECTRONICS, INC. 486DSX Processor 80486SX/80486DX Processor Speed 20/25/33MHz Chip Set OPTI Max. Onboard DRAM 32MB Cache 64/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options Parallel port, serial ports (2), floppy drive interface, IDE interface NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Serial port 1 J21 Turbo LED J2 pins 1 & 2 Serial port 2 J22 Turbo switch J2 pins 3 & 4 Power LED & J23 keylock External battery J10 Speaker J24 Floppy drive J19 Parallel port J27 interface IDE interface J20 IDE interface LED J28 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP1 pins 1 & 2 closed Monitor type select monochrome JP1 pins 2 & 3 closed » CMOS battery select internal JP2 pins 1 & 2 closed CMOS battery select external JP2 pins 2 & 3 closed » Factory configured - do not alter JP3 pins 1 & 2 closed » System clock speed select OSC/2 JP4 pins 2 & 3 closed System clock speed select OSC/1 JP4 pins 1 & 2 closed » CMOS memory normal operation JP14 pins 1 & 2 closed CMOS memory clear JP14 pins 2 & 3 closed » IRQ4 select serial port 1 (J21) JP15 pins 2 & 3 closed IRQ4 select serial port 2 (J22) JP15 pins 1 & 2 closed IRQ4 disabled JP15 pins 3 & 4 closed IRQ3 select serial port 1 (J21) JP16 pins 2 & 3 closed » IRQ3 select serial port 2 (J22) JP16 pins 1 & 2 closed IRQ3 disabled JP16 pins 3 & 4 closed IRQ9 select serial port 1 (J21) JP17 pins 2 & 3 closed IRQ9 select serial port 2 (J22) JP17 pins 1 & 2 closed » IRQ9 disabled JP17 pins 3 & 4 closed IRQ5 select serial port 1 (J21) JP18 pins 2 & 3 closed IRQ5 select serial port 2 (J22) JP18 pins 1 & 2 closed » IRQ5 disabled JP18 pins 3 & 4 closed » Parallel port (J27) select IRQ7 JP19 pins 1 & 2 closed Parallel port (J27) select IRQ5 JP19 pins 2 & 3 closed Parallel port (J27) select no JP19 pins 3 & 4 interrupt closed » IDE on-board interface enabled JP25 pins 1 & 2 closed IDE on-board interface disabled JP25 pins 2 & 3 closed » Floppy on-board interface enabled JP26 pins 1 & 2 closed Floppy on-board interface JP26 pins 2 & 3 disabled closed » Serial port 1 (J21) select COM1 JP27 pins 1 & 2 closed Serial port 1 (J21) select COM3 JP27 pins 2 & 3 closed Serial port 1 (J21) disabled JP27 pins 3 & 4 closed » Serial port 2 (J22) select COM2 JP28 pins 1 & 2 closed Serial port 2 (J22) select COM4 JP28 pins 2 & 3 closed Serial port 2 (J22) disabled JP28 pins 3 & 4 closed » Parallel port (J27) select LPT1 JP29 pins 1 & 2 closed Parallel port (J27) select LPT2 JP29 pins 2 & 3 closed Parallel port (J27) disabled JP29 pins 3 & 4 closed 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) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 64KB (8) 8K x 8 256KB (8) 32K x 8 CACHE JUMPER CONFIGURATION Size JP9 JP10 64KB pins 2 & 3 closed pins 2 & 3 closed 256KB pins 1 & 2 closed pins 1 & 2 closed CPU TYPE CONFIGURATION Type JP5 JP6 JP7 80486SX pins 3 & 4 pins 3 & 4 pins 3 & 4 closed closed closed 80487SX pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed 80486DX pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed