NORTHGATE COMPUTER SYSTEMS, INC. SLIMLINE CACHE 386SX Processor 80386SX Processor Speed 16/20MHz Chip Set VLSI Max. Onboard DRAM 8MB Cache 64KB BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, serial ports (2), VGA port NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location VGA port J1 Serial port 2 J10 Turbo LED J3 Parallel port LPT1 J15 Power LED & keylock J4 Floppy drive interface J16 Speaker J5 IDE interface J17 Reset switch J6 Riser card R1 IDE interface LED J8 Turbo switch W6 Serial port 1 J9 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not SW1/1 & 2 Open alter » Factory configured - do not SW2/3 & 4 Open alter » Factory configured - do not SW21 & 2 N/A alter » Floppy drive interface interrupt SW2/pins 11 & Open (IRQ6) enabled 12 Floppy drive interface interrupt SW2/pins 11 & Closed (IRQ6) disabled 12 » Floppy drive interface DMARQ2 SW2/pins 13 & Open enabled 14 Floppy drive interface DMARQ2 SW2/pins 13 & Closed disabled 14 » Floppy drive interface DACK2 SW2/pins 15 & Open enabled 16 Floppy drive interface DACK2 SW2/pins 15 & Closed disabled 16 » Floppy drive interface enabled SW3/pins 1 & 2 Open Floppy drive interface disabled SW3/pins 1 & 2 Closed » Factory configured - do not SW3/pins 5 & 6 Open alter » Factory configured - do not W1 Closed alter » Cache enabled W2 Closed Cache disabled W2 Open » Memory (8-bit) speed select 4 W3 pins 2 & 3 wait states closed Memory (8-bit) speed select 6 W3 pins 1 & 2 wait states closed » Memory (16-bit) speed select 1 W4 pins 2 & 3 wait states closed Memory (16-bit) speed select 2 W4 pins 1 & 2 wait states closed » BIOS type select 27256 W5 pins 2 & 3 closed BIOS type select 27512 W5 pins 1 & 2 closed Monitor type select monochrome W7 pins 1 & 2 closed Monitor type select color W7 pins 2 & 3 closed » Parallel port (J2) mode select W11 pins 2 & 3 output only closed Parallel port (J2) mode select W11 pins 1 & 2 bi-directional closed » Floppy drive write precomp W17 pins 2 & 3 select standard closed Floppy drive write precomp W17 pins 1 & 2 select two speed drive closed » Floppy drive type select W18 pins 1 & 2 standard closed Floppy drive type select two W18 pins 2 & 3 speed drive closed » IDE interface enabled W20 Open IDE interface disabled W20 Closed » IDE interface interrupt (IRQ4) W21 Open enabled IDE interface interrupt disabled W21 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 Socket Socket U71 U76 512KB (2) NONE NONE NONE PAL B PAL B 256K x 9 1MB (2) (2) NONE NONE PAL B PAL B 256K x 256K x 9 9 2MB (2) 1M NONE NONE NONE PAL A PAL A x 9 3MB (2) (2) (2) 1M NONE PAL B PAL B 256K x 256K x x 9 9 9 4MB (2) 1M (2) 1M NONE NONE PAL A PAL A x 9 x 9 5MB (2) (2) (2) 1M (2) 1M PAL B PAL B 256K x 256K x x 9 x 9 9 9 6MB (2) 1M (2) 1M (2) 1M NONE PAL A PAL A x 9 x 9 x 9 8MB (2) 1M (2) 1M (2) 1M (2) 1M PAL A PAL A x 9 x 9 x 9 x 9 DRAM JUMPER/SWITCH CONFIGURATION Size SW1/5 & 6 SW1/7 & 8 SW1/9 & W8 W9 10 512KB Open Open Open pins 1 & 2 pins 2 & 3 closed closed 1MB Open Closed Open pins 1 & 2 pins 2 & 3 closed closed 2MB Closed Open Open pins 1 & 2 pins 1 & 2 closed closed 3MB Closed Open Open pins 1 & 2 pins 2 & 3 closed closed 4MB Open Open Open pins 1 & 2 pins 1 & 2 closed closed 5MB Open Closed Open pins 1 & 2 pins 2 & 3 closed closed 6MB Closed Open Open pins 1 & 2 pins 1 & 2 closed closed 8MB Closed Open Open pins 1 & 2 pins 1 & 2 closed closed Note:DRAM jumper configurations correlate directly to memory configurations. CACHE CONFIGURATION Size Bank 0 TAG 64KB (2) 64K x 4 (1) 8K x 8 Note:Arrangement of Cache/TAG unverified. PARALLEL PORT CONFIGURATION LPT# Interrupt Address SW2/7 & SW2/9 & SW3/9 & SW3/11 8 10 10 & 12 LPT1 IRQ7 378h Open Closed Open Open LPT1 IRQ7 3BCh Open Closed Open Closed LPT2 IRQ5 278h Closed Open Closed Open Disabled N/A N/A Open Open Closed Closed SERIAL PORT 1 CONFIGURATION Setting SW2/3 & 4 SW3/3 & 4 COM2/IRQ3 Closed Open Disabled Open Closed SERIAL PORT 2 CONFIGURATION Setting SW2/5 &6 SW3/7 & 8 COM1/IRQ4 Closed Open Disabled Open Closed ON BOARD VIDEO CONFIGURATION Size SW5 Enabled pins 1 & 2, 3 & 4, 5 & 6 closed & pins 7 & 8 open Disabled pins 1 & 2, 3 & 4, 5 & 6 open & pins 7 & 8 closed