UNIDENTIFIED 486TC4 Processor 80486SX/80487SX/80486DX Processor Speed 20/25/33MHz Chip Set C & T Max. Onboard DRAM 32MB SRAM Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit external memory card slot NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location External battery JP2 Turbo LED JP10 Speaker JP7 Turbo switch JP11 Power LED & keylock JP8 32-bit external S1 memory card Reset switch JP9 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter J3 unknown » Factory configured - do not alter J4 unknown » Battery select internal JP1 closed Battery select external JP1 open » CMOS memory normal operation JP3 pins 1 & 2 closed CMOS memory clear JP3 pins 2 & 3 closed » Monitor type select color JP4 pins 1 & 2 closed Monitor type select monochrome JP4 pins 2 & 3 closed » Factory configured - do not alter JP5 unknown » Factory configured - do not alter JP15 unknown CPU JUMPER CONFIGURATION CPU JP12 JP13 JP16 80486DX pins 2 & 3 pins 2 & 3 closed closed closed 80487SX pins 1 & 2 pins 2 & 3 closed closed closed 80486SX pins 2 & 3 pins 1 & 2 open closed closed SRAM JUMPER CONFIGURATION Jumper 64KB 128KB 256KB SR1 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed SR2 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR3 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR4 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR5 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed SR6 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR7 pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed SR8 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed SR9 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR10 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SR11 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SRAM CONFIGURATION Size Cache SRAM Location TAG (U35) TAG (U37) 32KB (4) 8K x 8 Bank 0 (1) 8K x 8 NONE 64KB (8) 8K x 8 Banks 0 & 1 (1) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 NONE 256KB (8) 32K x 8 Banks 0 & 1 (1) 8K x 8 (1) 8K x 8 DRAM CONFIGURATION Size Bank 0 Bank 1 JP6 1MB (4) 256K x 9 NONE pins 1 & 2 closed 2MB (4) 256K x 9 (4) 256K x 9 pins 1 & 2 closed 4MB (4) 1M x 9 NONE pins 1 & 2 closed 5MB (4) 1M x 9 (4) 256K x 9 pins 2 & 3 closed 8MB (4) 1M x 9 (4) 1M x 9 pins 1 & 2 closed 16MB (4) 4M x 9 NONE pins 1 & 2 closed 17MB (4) 4M x 9 (4) 256K x 9 pins 2 & 3 closed 20MB (4) 4M x 9 (4) 1M x 9 pins 2 & 3 closed 32MB (4) 4M x 9 (4) 4M x 9 pins 1 & 2 closed