ATLANTIC COMPUTER PRODUCTS, INC. 486 CONTAQ CACHE Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set Contaq Max. onboard DRAM32MB SRAM Cache 64/256KB BIOS AMI Dimensions 238mm x 220mm I/O Options 32-bit VESA local bus slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery JP5 Speaker JP33 Turbo switch JP30 Power LED & keylock JP34 Turbo LED JP31 32-bit VESA local bus S1 slot Reset switch JP32 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP1 Closed Monitor type select monochrome JP1 Open » CMOS memory normal operation JP6 pins 1 & 2 closed CMOS memory clear JP6 pins 2 & 3 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 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP11 JP12 JP13 JP41 64KB Open Open Open pins 2 & 3 closed 256KB Closed Closed pins 1 & 2 pins 2 & 3 closed closed CPU TYPE CONFIGURATION CPU Type JP2 JP3 JP7 JP8 80486SX Open pins 1 & 2 Open Open closed 80487SX pins 1 & 2 pins 2 & 3 Closed Closed closed closed 80486DX pins 2 & 3 pins 2 & 3 Open Closed closed closed 80486DX2 pins 2 & 3 pins 2 & 3 Open Closed closed closed CPU SPEED CONFIGURATION CPU OSC1 JP15 Type A JP15 Type B JP22 JP23 20MHz 40MHz pins 3 & 4 pins 2 & 3 Open Open 25MHz 25MHz pins 2 & 4 pins 2 & 4 Closed Open 33MHz 33MHz pins 2 & 4 pins 2 & 4 Open Closed 50i MHz 25MHz pins 2 & 4 pins 2 & 4 Closed Open 50MHz 50MHz pins 2 & 4 pins 2 & 4 Closed Closed 66i MHz 33MHz pins 2 & 4 pins 2 & 4 Open Closed [Image] Note: Check the system board to determine if JP15 is type A or type B. Pins designated should be in the closed position. CHIPSET CONFIGURATION Chipset Mode LJ4 LJ5 LJ6 82C591 Synchronous mode pins 2 & 3 Closed Open closed 82C591 Asynchronous mode pins 1 & 2 Open Open closed 82C591A Synchronous mode pins 2 & 3 Open Closed closed 82C591A Asynchronous mode pins 1 & 2 Open Open closed VESA WAIT STATE (ID2) CONFIGURATION Wait states CPU speed LJ1 (ID2) 0 wait states £ 33MHz Open 1 wait state > 33MHz Closed VESA BUS SPEED (ID3) CONFIGURATION CPU speed LJ2 (ID3) £ 33MHz Open > 33MHz Closed VESA ID4 CONFIGURATION Setting LJ3 (ID4) Reserved for future use Closed