COMPUTREND SYSTEMS, INC. UMC-386 (MS-3131 Ver. 1.1) Processor 80386DX Processor Speed 33/40MHz Chip Set UMC Max. Onboard DRAM 32MB SRAM Cache 32/64/128/256KB BIOS AMI Dimensions 220mm x 220mm I/O Options Auxiliary keyboard connector NPU Options 80387 [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Turbo switch J2/15 - 17 Power LED & keylock J2/1 - 5 Turbo LED J2/12 & 13 Speaker J2/7 - 10 Auxiliary keyboard KB2 Reset switch J2/19 & 20 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome JP1 open Monitor type select color JP1 closed » NPU disabled JP3 open JP9 open NPU endabled JP3 closed JP9 closed » Battery select internal J1 pins 2 & 3 closed battery select external J1 connected 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 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 JUMPER CONFIGURATION Size JP4 JP5 JP6 JP7 JP8 JP11 JP12 JP13 32KB open open pins pins pins pins pins open 2 & 1 & 1 & 2 & 1 & 3 2 2 3 2 64KB open open pins pins pins pins pins closed 2 & 1 & 1 & 1 & 2 & 3 2 2 2 3 128KB closed open pins pins pins pins pins closed 1 & 2 & 1 & 1 & 2 & 2 3 2 2 3 256KB closed closed pins pins pins pins pins closed 2 & 2 & 2 & 1 & 2 & 3 3 3 2 3 Note:Pins designated should be in the closed position. CACHE CONFIGURATION Size Cache SRAM Location TAG 32KB (4) 8K x 8 Bank 0 (1) 8K x 8 64KB (8) 8K x 8 Banks 0 & 1 (1) 8K x 8 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8