ACHME COMPUTER, INC. MS-4137 (VLB 486 AL5) Processor 80486SX/CX486M7/AMD486DXL/80486DX/80486DX2/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set ALI Max. 64MB Onboard DRAM Cache 128/256KB BIOS AMI Dimensions 254mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery JB Reset switch JFP (pins 19-20) Power LED & JFP (pins Green PC connector JG1 keylock 1-5) Speaker JFP (pins Green PC connector JG2 7-10) Green PC connector JFP (pins Green PC connector JG3 9-10) Turbo LED JFP (pins 32-bit VESA local SL1 - SL3 12-13) bus slots Turbo switch JFP (pins 15-17) Note: If speaker is installed, JFP (pins 9-10) are not used. USER CONFIGURABLE SETTINGS Function Jumper Position » Battery type select internal JB pins 2 & 3 closed Battery type select external JB Closed » CPU type select Intel/AMD JC1 pins 1 & 2 closed CPU type select Cyrix JC1 pins 2 & 3 closed » Factory configured - do not JC2 Open alter » Factory configured - do not JC3 Open alter » Factory configured - do not JC9 Open alter » CPU type select P24C not JK5 Closed installed CPU type select P24C installed JK5 Open » Monitor type select monochrome JP1 pins 1 & 2 closed Monitor type select color JP1 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 3MB (1) 256K x (1) 512K x NONE NONE 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 3MB (1) 512K x (1) 256K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 512K x (1) 256K x (1) 256K x NONE 36 36 36 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 5MB (1) 1M x 36 (1) 256K x NONE NONE 36 6MB (1) 1M x 36 (1) 512K x NONE NONE 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB (1) 256K x (1) 1M x 36 (1) 256K x NONE 36 36 6MB (1) 512K x (1) 1M x 36 NONE NONE 36 7MB (1) 256K x (1) 256K x (1) 256K x (1) 1M x 36 36 36 36 7MB (1) 512K x (1) 256K x (1) 1M x 36 NONE 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 9MB (1) 256K x (1) 2M x 36 NONE NONE 36 9MB (1) 256K x (1) 1M x 36 (1) 1M x 36 NONE 36 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 9MB (1) 2M x 36 (1) 256K x NONE NONE 36 10MB (1) 512K x (1) 2M x 36 NONE NONE 36 10MB (1) 2M x 36 (1) 512K x NONE NONE 36 10MB (1) 2M x 36 (1) 256K x (1) 256K x NONE 36 36 10MB (1) 512K x (1) 1M x 36 (1) 1M x 36 NONE 36 12MB (1) 1M x 36 (1) 2M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 12MB (1) 2M x 36 (1) 1M x 36 NONE NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 13MB (1) 2M x 36 (1) 256K x (1) 1M x 36 NONE 36 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 NONE 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 18MB (1) 4M x 36 (1) 512K x NONE NONE 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB (1) 512K x (1) 4M x 36 NONE NONE 36 19MB (1) 256K x (1) 256K x (1) 256K x (1) 4M x 36 36 36 36 19MB (1) 512K x (1) 256K x (1) 4M x 36 NONE 36 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 21MB (1) 256K x (1) 1M x 36 (1) 4M x 36 NONE 36 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 512K x (1) 1M x 36 (1) 4M x 36 NONE 36 22MB (1) 512K x (1) 1M x 36 (1) 4M x 36 NONE 36 24MB (1) 4M x 36 (1) 2M x 36 NONE NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 2M x 36 (1) 4M x 36 NONE NONE 24MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 NONE 25MB (1) 2M x 36 (1) 256K x (1) 4M x 36 NONE 36 28MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 28MB (1) 2M x 36 (1) 1M x 36 (1) 4M x 36 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 33MB (1) 256K x (1) 8M x 36 NONE NONE 36 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 33MB (1) 8M x 36 (1) 256K x NONE NONE 36 34MB (1) 512K x (1) 8M x 36 NONE NONE 36 34MB (1) 8M x 36 (1) 512K x NONE NONE 36 34MB (1) 8M x 36 (1) 256K x (1) 256K x NONE 36 36 36MB (1) 1M x 36 (1) 8M x 36 NONE NONE 36MB (1) 4M x 36 (1) 1M x 36 (1) 4M x 36 NONE 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 36MB (1) 8M x 36 (1) 1M x 36 NONE NONE 37MB (1) 8M x 36 (1) 256K x (1) 1M x 36 NONE 36 40MB (1) 2M x 36 (1) 8M x 36 NONE NONE 40MB (1) 8M x 36 (1) 2M x 36 NONE NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 40MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 NONE 48MB (1) 4M x 36 (1) 8M x 36 NONE NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 48MB (1) 8M x 36 (1) 4M x 36 NONE NONE 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 49MB (1) 8M x 36 (1) 256K x (1) 4M x 36 NONE 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 52MB (1) 8M x 36 (1) 1M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K/16K/32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K/32K x 8 256KB (4) 64K x 8 NONE (1) 16K/32K x 8 CACHE JUMPER CONFIGURATION Size JS1 JS2 JS3 128KB pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed 256KB pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed 256KB pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed CPU TYPE CONFIGURATION Type JC4 JC5 JC6 80486SX 2 & 3 4 & 5 Open SL80486SX 2 & 3 5 & 6 JC5 pin1 & JC6 pin1 80486DX/DX2 1 & 2, 3 & 4 4 & 5 3 & 4 CX486M7 1 & 2, 3 & 4 2 & 3, 5 & 3 & 4, 5 & 6 6 AMD486DXL 1 & 2, 3 & 4 4 & 5 3 & 4 SL80486DX/DX2/DX4 1 & 2, 3 & 4 5 & 6 3 & 4, JC5 pin1 & JC6 pin1 Pentium Overdrive 1 & 2, 3 & 4 5 & 6 2 & 3, JC5 pin1 & JC6 pin1 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JC7 JC8 80486SX Open pins 4 & 5 closed SL80486SX 5 & 6 JC7 pin1 & JC8 pin1 80486DX/DX2 Open 4 & 5 CX486M7 2 & 3, 4 & 5 4 & 5 AMD486DXL JC6 pin1 & JC7 pin1, 4 & 5 JC6 pin5 & JC7 pin5 SL80486DX/DX2/DX4 5 & 6 4 & 5, JC7 pin1 & JC8 pin1 Pentium Overdrive 5 & 6 4 & 5, JC7 pin1 & JC8 pin1 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JK1 JK2 JK3 JK4 25MHz 1 & 2 2 & 3 2 & 3 1 & 6, 4 & 9, 5 & 10 33MHz 1 & 2 2 & 3 2 & 3 1 & 6, 2 & 7, 3 & 8, 4 & 9, 5 & 10 40MHz 2 & 3 4 & 5 2 & 3 2 & 7, 5 & 10 50iMHz 1 & 2 2 & 3 2 & 3 1 & 6, 4 & 9, 5 & 10 50MHz 2 & 3 1 & 2 1 & 2 1 & 6, 4 & 9 66iMHz 1 & 2 2 & 3 2 & 3 1 & 6, 2 & 7, 3 & 8, 4 & 9, 5 & 10 75iMHz 1 & 2 2 & 3 2 & 3 1 & 6, 4 & 9, 5 & 10 100iMHz 1 & 2 2 & 3 2 & 3 1 & 6, 2 & 7, 3 & 8, 4 & 9, 5 & 10 Note: Pins designated should be in the closed position. VOLTAGE CONFIGURATION Voltage J50 3.3v pins 1 & 2, 3 & 4, 5 & 6 closed 5v pins 7 & 8, 9 & 10 11 & 12closed Note: The mainboard can only support 5v when a 3.3v regulator is not installed.