ACHME COMPUTER, INC. MS-4131 VLB 486 AL2 Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set ALI Max. Onboard DRAM112MB Cache 128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery JB 32-bit VESA Local bus S2 slot 32-bit VESA Local bus S1 32-bit VESA Local bus S3 slot slot PIN OUT CONFIGURATION Connector JFP Keylock pins 1 & 2 closed Power LED pins 3 & 5 closed Turbo LED pins 12 & 13 closed Turbo switch pins 15, 16, & 17 closed Reset pins 19 & 20 closed Speaker pins 7, 8, 9, & 10 closed USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JC1 pins 1 & 2 alter closed » Factory configured - do not JC2 pins 1 & 2 alter closed » Factory configured - do not JC3 pins 1 & 2 alter closed » Factory configured - do not JC5 Closed alter » Factory configured - do not JC7 pins 1 & 2 alter closed » CPU PQFP not installed JC8 Closed CPU PQFP installed JC8 Open » Factory configured - do not JC9 N/A alter » Factory configured - do not JC10 Open alter » Monitor type select monochrome JP1 pins 1 & 2 closed Monitor type select color JP1 pins 2 & 3 closed » Factory configured - do not JP4 N/A alter CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1)8K x 8/(1)16K x 8/(1)32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 8/(1) 32K x 8 CACHE JUMPER CONFIGURATION Size JS1 JS2 64KB pins 2 & 3 closed pins 2 & 3 closed 128KB pins 1 & 2 closed pins 1 & 2 closed 256KB pins 1 & 2 closed pins 1 & 2 closed CPU TYPE CONFIGURATION Type JC4 JC6 80486SX pins 1 & 2 closed Open 80487SX pins 2 & 3 closed pins 1 & 2 closed 80486DX pins 2 & 3 closed pins 2 & 3 closed 80486DX2 pins 2 & 3 closed pins 2 & 3 closed CPU SPEED CONFIGURATION Speed JK1 JK2 JK3 JK4 JP2 25MHz 3 & 7 and pins 1 & pins 1 & Closed pins 1 & 4 & 8 2 2 2 33MHz 1 & 2 and pins 1 & pins 1 & Closed pins 1 & 4 & 8 2 2 2 40MHz 1 & 5 and pins 2 & pins 2 & Closed pins 2 & 2 & 6 3 3 3 50i MHz 3 & 7 and pins 1 & pins 1 & Closed pins 1 & 4 & 8 2 2 2 50MHz pins 2 & pins 2 & pins 2 & Open pins 2 & 6 3 3 3 66i MHz 1 & 2 and pins 1 & pins 1 & Closed pins 1 & 4 & 8 2 2 2 Note:Pins designated should be in the closed position. VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states JP4/pins 1 & 2 JP4/pins 3 & 4 <= 33MHz 0 wait states Open Open > 33MHz 1 wait state Closed Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB (4) 256K x 9 None None 4MB None (1) 1M x 36 None 4MB None None (1) 1M x 36 4MB (4) 1M x 9 None None 5MB (4) 256K x 9 (1) 1M x 36 None 5MB (4) 256K x 9 None (1) 1M x 36 8MB None (1) 1M x 36 (1) 1M x 36 8MB None (1) 2M x 36 None 8MB None None (1) 2M x 36 9MB (4) 256K x 9 (1) 2M x 36 None 9MB (4) 256K x 9 None (1) 2M x 36 12MB (4) 1M x 9 (1) 2M x 36 None 12MB (4) 1M x 9 None (1) 2M x 36 16MB (4) 4M x 9 None None 16MB (4) 4M x 9 (1) 1M x 36 None 16MB None (1) 2M x 36 (1) 2M x 36 16MB (4) 4M x 9 None (1) 1M x 36 24MB (4) 4M x 9 (1) 2M x 36 None 24MB (4) 4M x 9 None (1) 2M x 36 32MB None (1) 4M x 36 None 32MB None None (1) 4M x 36 33MB (4) 256K x 9 (1) 4M x 36 None 33MB (4) 256K x 9 None (1) 4M x 36 36MB (4) 1M x 9 (1) 4M x 36 None 36MB (4) 1M x 9 None (1) 4M x 36 48MB (4) 4M x 9 (1) 4M x 36 None 48MB (4) 4M x 9 None (1) 4M x 36 DRAM CONFIGURATION (CONT.) Size Bank 0 Bank 1 Bank 2 64MB None (1) 8M x 36 None 64MB None (1) 4M x 36 (1) 4M x 36 64MB None None (1) 8M x 36 65MB (4) 256K x 9 None (1) 8M x 36 65MB (4) 256K x 9 (1) 8M x 36 None 68MB (4) 1M x 9 (1) 8M x 36 None 68MB (4) 1M x 9 None (1) 8M x 36 88MB (4) 4M x 9 None (1) 8M x 36 88MB (4) 4M x 9 (1) 8M x 36 None 96MB None (1) 8M x 36 (1) 4M x 36 97MB (4) 256K x 9 (1) 8M x 36 (1) 4M x 36 100MB (4) 1M x 9 (1) 8M x 36 (1) 4M x 36 112MB (4) 4M x 9 (1) 8M x 36 (1) 4M x 36