UNIDENTIFIED MB-4D50AV Processor CXM6/SL80486SX/80486SX/CXM7/AM486DXLV-S/SL80486DX/80486DX/ 80486DX2/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set ALI Max. 128MB Onboard DRAM Cache 128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slots (3), green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Green PC connector JP9 Turbo LED J2 Green PC connector JP10 (monitor) External J3 Green PC JP32 battery connector-(external input) Turbo switch J4 Green PC connector-(ring JP33 input) Power LED & J5 32-bit VESA local bus SL1 - SL3 keylock slots Speaker J6 USER CONFIGURABLE SETTINGS Function Jumper Position » Battery type select internal J3 Open Battery type select external J3 Closed CMOS memory clear J3 pins 2 & 3 closed » Real time clock enabled JP12 pins 1 & 2 closed Real time clock disabled JP12 pins 2 & 3 closed » Monitor type select color JP13 Closed Monitor type select monochrome JP13 Open » CPU type select P24T/CXM6/CXM7 2x JP20 Closed CPU type select CXM6/CXM7 1x JP20 Open DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB NONE NONE NONE (1) 256K x 36 2MB NONE NONE (1) 256K x (1) 256K x 36 36 2MB NONE NONE NONE (1) 512K x 36 3MB NONE (1) 256K x NONE (1) 512K x 36 36 3MB NONE (1) 256K x (1) 256K x (1) 256K x 36 36 36 4MB NONE NONE NONE (1) 1M x 36 4MB NONE (1) 512K x NONE (1) 512K x 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB NONE NONE (1) 256K x (1) 1M x 36 36 5MB NONE NONE (1) 1M x 36 (1) 256K x 36 6MB NONE (1) 1M x 36 NONE (1) 512K x 36 6MB NONE (1) 256K x (1) 256K x (1) 1M x 36 36 36 6MB NONE (1) 1M x 36 (1) 256K x (1) 256K x 36 36 6MB NONE (1) 256K x (1) 1M x 36 (1) 256K x 36 36 8MB NONE NONE (1) 1M x 36 (1) 1M x 36 8MB NONE NONE NONE (1) 2M x 36 9MB NONE (1) 256K x NONE (1) 2M x 36 36 9MB NONE (1) 1M x 36 (1) 256K x (1) 1M x 36 36 9MB NONE (1) 256K x (1) 1M x 36 (1) 1M x 36 36 9MB NONE (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 10MB NONE (1) 512K x NONE (1) 2M x 36 36 10MB NONE (1) 2M x 36 NONE (1) 512K x 36 12MB NONE (1) 1M x 36 NONE (1) 2M x 36 12MB NONE (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB NONE NONE NONE (1) 4M x 36 16MB NONE (1) 2M x 36 NONE (1) 2M x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 17MB NONE NONE (1) 256K x (1) 4M x 36 36 17MB NONE NONE (1) 4M x 36 (1) 256K x 36 18MB NONE (1) 4M x 36 NONE (1) 512K x 36 18MB NONE (1) 256K x (1) 256K x (1) 4M x 36 36 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 18MB NONE (1) 4M x 36 (1) 256K x (1) 256K x 36 36 18MB NONE (1) 256K x (1) 4M x 36 (1) 256K x 36 36 20MB NONE NONE (1) 1M x 36 (1) 4M x 36 20MB NONE NONE (1) 4M x 36 (1) 1M x 36 21MB NONE (1) 1M x 36 (1) 256K x (1) 4M x 36 36 21MB NONE (1) 4M x 36 (1) 256K x (1) 1M x 36 36 21MB NONE (1) 256K x (1) 1M x 36 (1) 4M x 36 36 21MB NONE (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 21MB NONE (1) 256K x (1) 4M x 36 (1) 1M x 36 36 21MB NONE (1) 1M x 36 (1) 4M x 36 (1) 256K x 36 24MB NONE (1) 4M x 36 NONE (1) 2M x 36 24MB NONE (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 24MB NONE (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 24MB NONE (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 25MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 28MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB NONE NONE (1) 4M x 36 (1) 4M x 36 32MB NONE NONE NONE (1) 8M x 36 33MB NONE (1) 256K x NONE (1) 8M x 36 36 33MB NONE (1) 4M x 36 (1) 256K x (1) 4M x 36 36 33MB NONE (1) 256K x (1) 4M x 36 (1) 4M x 36 36 33MB NONE (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 34MB NONE (1) 512K x NONE (1) 8M x 36 36 34MB NONE (1) 8M x 36 NONE (1) 512K x 36 36MB NONE (1) 1M x 36 NONE (1) 8M x 36 36MB NONE (1) 4M x 36 (1) 1M x 36 (1) 4M x 36 36MB NONE (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 36MB NONE (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 36MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 40MB NONE (1) 2M x 36 NONE (1) 8M x 36 40MB NONE (1) 8M x 36 NONE (1) 2M x 36 48MB NONE (1) 4M x 36 NONE (1) 8M x 36 48MB NONE (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB NONE NONE NONE (1) 16M x 36 64MB NONE (1) 8M x 36 NONE (1) 8M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 65MB NONE NONE (1) 256K x (1) 16M x 36 36 65MB NONE NONE (1) 16M x 36 (1) 256K x 36 66MB NONE (1) 16M x 36 NONE (1) 512K x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 66MB NONE (1) 256K x (1) 256K x (1) 16M x 36 36 36 66MB NONE (1) 16M x 36 (1) 256K x (1) 256K x 36 36 66MB NONE (1) 256K x (1) 16M x 36 (1) 256K x 36 36 68MB NONE NONE (1) 1M x 36 (1) 16M x 36 68MB NONE NONE (1) 16M x 36 (1) 1M x 36 69MB NONE (1) 1M x 36 (1) 256K x (1) 16M x 36 36 69MB NONE (1) 16M x 36 (1) 256K x (1) 1M x 36 36 69MB NONE (1) 256K x (1) 1M x 36 (1) 16M x 36 36 69MB NONE (1) 16M x 36 (1) 1M x 36 (1) 256K x 36 69MB NONE (1) 256K x (1) 16M x 36 (1) 1M x 36 36 69MB NONE (1) 1M x 36 (1) 16M x 36 (1) 256K x 36 72MB NONE (1) 16M x 36 NONE (1) 2M x 36 72MB NONE (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 72MB NONE (1) 16M x 36 (1) 1M x 36 (1) 1M x 36 76MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 80MB NONE NONE (1) 4M x 36 (1) 16M x 36 80MB NONE (1) 1M x 36 (1) 16M x 36 (1) 1M x 36 81MB NONE (1) 16M x 36 (1) 256K x (1) 4M x 36 36 81MB NONE (1) 256K x (1) 4M x 36 (1) 16M x 36 36 81MB NONE (1) 256K x (1) 16M x 36 (1) 4M x 36 36 81MB NONE (1) 4M x 36 (1) 16M x 36 (1) 256K x 36 84MB NONE (1) 4M x 36 (1) 1M x 36 (1) 16M x 36 84MB NONE (1) 16M x 36 (1) 1M x 36 (1) 4M x 36 84MB NONE (1) 1M x 36 (1) 4M x 36 (1) 16M x 36 84MB NONE (1) 16M x 36 (1) 4M x 36 (1) 1M x 36 84MB NONE (1) 1M x 36 (1) 16M x 36 (1) 4M x 36 84MB NONE (1) 4M x 36 (1) 16M x 36 (1) 1M x 36 88MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 96MB NONE (1) 16M x 36 NONE (1) 8M x 36 96MB NONE (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 96MB NONE (1) 16M x 36 (1) 4M x 36 (1) 4M x 36 96MB NONE (1) 4M x 36 (1) 16M x 36 (1) 4M x 36 97MB (1) 16M x (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 36 100MB (1) 16M x (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 36 112MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 112MB (1) 16M x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 112MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 128MB NONE NONE (1) 16M x 36 (1) 16M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K x 8 or (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP3 JP4 128KB pins 2 & 3 closed pins 2 & 3 closed 256KB pins 1 & 2 closed pins 1 & 2 closed CPU TYPE CONFIGURATION Type JP8 JP16 JP17 JP18 JP19 CX M6 5 & 6 Open Open Closed Open SL80486SX 1 & 2 Closed Closed Open Closed 80486SX Open Closed Closed Open Open CX M7 5 & 6 Closed Open Closed Open AM486DXLV-S 3 & 4 Closed Closed Open Open SL80486DX 1 & 2 Closed Closed Open Closed 80486DX Open Closed Closed Open Open 80486DX2 Open Closed Closed Open Open Pentium 1 & 2 Closed Closed Open Open Overdrive Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP21 JP22 JP23 JP24 JP25 CX M6 1 & 2 Open 2 & 3 1 & 2 1 & 2 SL80486SX 1 & 2 Open 1 & 2 2 & 3 1 & 2 80486SX 1 & 2 Open 2 & 3 Open 1 & 2 CX M7 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 AM486DXLV-S 2 & 3 2 & 3 2 & 3 Open 1 & 2 SL80486DX 2 & 3 2 & 3 1 & 2 2 & 3 1 & 2 80486DX 2 & 3 2 & 3 2 & 3 Open 1 & 2 80486DX2 2 & 3 2 & 3 2 & 3 Open 1 & 2 Pentium 2 & 3 1 & 2 1 & 2 2 & 3 2 & 3 Overdrive Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP27 JP28 JP29 JP30 JP31 CX M6 Closed Open Closed 4 & 5 4 & 5 SL80486SX Open Open Open 1 & 2 1 & 2 80486SX Open Open Closed Open Open CX M7 Closed Open Closed 4 & 5 4 & 5 AM486DXLV-S Open Open Open 2 & 3 2 & 3 SL80486DX Open Open Open 1 & 2 1 & 2 80486DX Open Open Closed Open Open 80486DX2 Open Open Closed Open Open Pentium Open Closed Open 1 & 2 1 & 2 Overdrive Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP40 80486 pins 1 & 2 closed, pins 3 & 4 open Note: The location of JP40 is unidentified. CPU SPEED CONFIGURATION Speed JP7 JP26 JP35 JP36 25MHz pins 1 & 2, 5 pins 1 & 2 pins 1 & 2 pins 1 & 2 & 6 closed closed closed closed 33MHz pins 3 & 4, 5 pins 1 & 2 pins 1 & 2 pins 1 & 2 & 6 closed closed closed closed 40MHz pins 1 & 2, 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 & 4 closed closed closed closed 50iMHz pins 1 & 2, 5 pins 1 & 2 pins 1 & 2 pins 1 & 2 & 6 closed closed closed closed 50MHz pins 1 & 2, 5 pins 2 & 3 pins 2 & 3 pins 2 & 3 & 6 closed closed closed closed 66iMHz pins 3 & 4, 5 pins 1 & 2 pins 1 & 2 pins 1 & 2 & 6 closed closed closed closed VESA WAIT STATE CONFIGURATION Wait states JP40 0 wait states pins 5 & 6 open 1 wait state pins 5 & 6 closed Note: The location of JP40 is unidentified. BUS SPEED CONFIGURATION CPU speed JP40 <= 33MHz pins 7 & 8 open > 33MHz pins 7 & 8 closed Note: The location of JP40 is unidentified.