UNIDENTIFIED MB-4D50AG Processor CXM6/80486SX/CXM7/80486DX/80486DX2/P4S/P23S/P24S/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set ALI Max. Onboard128MB DRAM Cache 64/128/256/512KB BIOS Unidentified Dimensions 250mm x 220mm I/O Options 32-bit VESA local bus slots (2), 32-bit PCI slots (3), green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Green PC connector JP6 (monitor) Speaker J2 Green PC connector JP40 Power LED & keylock J3 Green PC connector JP41 Turbo switch J4 32-bit VESA local bus SL1 & SL2 slots Turbo LED J5 32-bit PCI slots PC1 - PC3 Reset switch J6 Note: The location of JP6 is unidentified. USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP37 N/A alter » CMOS memory normal operation JP38 pins 1 & 2 closed CMOS memory clear JP38 pins 2 & 3 closed » Monitor type select color JP39 pins 2 & 3 closed Monitor type select monochrome JP39 pins 1 & 2 closed » Factory configured - do not JP42 N/A alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 512K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 3MB (1) 512K x NONE (1) 256K x NONE 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 4MB (1) 512K x NONE (1) 512K x NONE 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 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) 512K x NONE (1) 1M x 36 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) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 7MB (1) 256K x (1) 256K x (1) 256K x (1) 1M x 36 36 36 36 7MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 256K x 36 36 36 7MB (1) 256K x (1) 1M x 36 (1) 256K x (1) 256K x 36 36 36 8MB (1) 2M x 36 NONE NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 9MB (1) 256K x (1) 1M x 36 (1) 1M x 36 NONE 36 9MB (1) 1M x 36 (1) 256K x (1) 1M x 36 NONE 36 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 10MB (1) 512K x NONE (1) 2M x 36 NONE 36 10MB (1) 2M x 36 NONE (1) 512K x NONE 36 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 10MB (1) 256K x (1) 1M x 36 (1) 256K x (1) 1M x 36 36 36 10MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 36 12MB (1) 2M x 36 NONE (1) 1M x 36 NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 13MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 36 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 2M x 36 NONE (1) 2M x 36 NONE 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 18MB (1) 512K x NONE (1) 4M x 36 NONE 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB (1) 256K x (1) 4M x 36 (1) 256K x NONE 36 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 19MB (1) 256K x (1) 256K x (1) 256K x (1) 4M x 36 36 36 36 19MB (1) 256K x (1) 256K x (1) 4M x 36 (1) 256K x 36 36 36 19MB (1) 256K x (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 20MB (1) 512K x (1) 512K x (1) 2M x 36 (1) 2M x 36 36 36 21MB (1) 256K x (1) 1M x 36 (1) 4M x 36 NONE 36 21MB (1) 256K x (1) 4M x 36 (1) 1M x 36 NONE 36 21MB (1) 1M x 36 (1) 256K x (1) 4M x 36 NONE 36 21MB (1) 1M x 36 (1) 4M x 36 (1) 256K x NONE 36 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 4M x 36 36 36 22MB (1) 256K x (1) 256K x (1) 4M x 36 (1) 1M x 36 36 36 22MB (1) 256K x (1) 1M x 36 (1) 256K x (1) 4M x 36 36 36 22MB (1) 256K x (1) 1M x 36 (1) 4M x 36 (1) 256K x 36 36 22MB (1) 256K x (1) 4M x 36 (1) 256K x (1) 1M x 36 36 36 22MB (1) 256K x (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 36 24MB (1) 2M x 36 NONE (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 NONE 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE 25MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 36 25MB (1) 256K x (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 36 25MB (1) 256K x (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 36 32MB (1) 8M x 36 NONE NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 33MB (1) 8M x 36 NONE (1) 256K x NONE 36 33MB (1) 256K x (1) 4M x 36 (1) 4M x 36 NONE 36 33MB (1) 4M x 36 (1) 256K x (1) 4M x 36 NONE 36 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 34MB (1) 512K x NONE (1) 8M x 36 NONE 36 34MB (1) 8M x 36 NONE (1) 512K x NONE 36 34MB (1) 256K x (1) 256K x (1) 4M x 36 (1) 4M x 36 36 36 34MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 36 36MB (1) 8M x 36 NONE (1) 1M x 36 NONE 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 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 37MB (1) 256K x (1) 4M x 36 (1) 1M x 36 (1) 4M x 36 36 37MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 36 40MB (1) 2M x 36 NONE (1) 8M x 36 NONE 40MB (1) 8M x 36 NONE (1) 2M x 36 NONE 48MB (1) 8M x 36 NONE (1) 4M x 36 NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 49MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 64MB (1) 8M x 36 NONE (1) 8M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 68MB (1) 512K x (1) 512K x (1) 8M x 36 (1) 8M x 36 36 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP4 JP5 64KB 1 & 2 2 & 3 1 & 2 1 & 2 1 & 2 128KB 2 & 3 1 & 2 2 & 3 1 & 2 1 & 2 256KB 2 & 3 4 & 5 2 & 3 2 & 3 1 & 2 512KB 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 Note: Pins designated should be closed position. CPU TYPE CONFIGURATION Type JP15 JP16 JP17 JP18 JP19 JP20 CX M6 Open Open 1 & 2 Open Closed Open 80486SX Open Open 1 & 2 Closed Open Open CX M7 Closed Open 1 & 2 Open Closed Closed AM486DXL Closed Open 1 & 2 Closed Open Open 80486DX Closed Open 1 & 2 Closed Open Open 80486DX2 Closed Open 1 & 2 Closed Open Open P23S Closed Closed 1 & 2 Closed Open Open P4S Closed Closed 1 & 2 Closed Open Open P24S Closed Closed 1 & 2 Closed Open Open P24T Closed Open 2 & 3 Closed Open Closed Note: Pins designated should be in the closed position. The location of JP15 & JP16 are unidentified. CPU TYPE CONFIGURATION (CON’T) Type JP21 JP22 JP23 JP24 JP25 JP26 CX M6 1 & 2 2 & 3 4 & 5 Open 1 & 2 4 & 5 80486SX 1 & 2 1 & 2 2 & 4 Open Open 2 & 4 CX M7 2 & 3 2 & 3 4 & 5 Open 1 & 2 4 & 5 AM486DXL 2 & 3 2 & 3 1 & 2 2 & 3 Open 1 & 2 80486DX 2 & 3 1 & 2 2 & 4 2 & 3 Open 2 & 4 80486DX2 2 & 3 1 & 2 2 & 4 2 & 3 Open 2 & 4 P23S 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 P4S 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 P24S 1 & 2 2 & 3 2 & 3 Open 2 & 3 2 & 3 P24T 2 & 3 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (BIOS SETUP) Type JP7 JP8 JP9 CX M6 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed 80486SX pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed CX M7 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed AM486DXL pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed 80486DX pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 80486DX2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed CPU TYPE CONFIGURATION (CHIPSET SETUP) Type JP27 JP29 JP30 JP47 CX M6 (1x) pins 2 & 3 pins 2 & 3 pins 1 & 2 Open closed closed closed CX M6 (2x) pins 2 & 3 pins 2 & 3 pins 1 & 2 Closed closed closed closed 80486SX pins 1 & 2 pins 1 & 2 pins 1 & 2 N/A closed closed closed CX M7 (1x) pins 1 & 2 pins 2 & 3 pins 1 & 2 Open closed closed closed CX M7 (2x) pins 1 & 2 pins 2 & 3 pins 1 & 2 Closed closed closed closed AM486DXL pins 1 & 2 pins 1 & 2 pins 1 & 2 N/A closed closed closed 80486DX pins 1 & 2 pins 1 & 2 pins 1 & 2 N/A closed closed closed 80486DX2 pins 1 & 2 pins 1 & 2 pins 1 & 2 N/A closed closed closed CPU SPEED CONFIGURATION Speed JP10 JP11 JP12 JP13 JP28 20MHz 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 25MHz 2 & 3 2 & 3 1 & 2 2 & 3 1 & 2 33MHz 2 & 3 1 & 2 2 & 3 2 & 3 1 & 2 40MHz 2 & 3 2 & 3 2 & 3 1 & 2 2 & 3 50iMHz 2 & 3 2 & 3 1 & 2 2 & 3 1 & 2 50MHz 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 66iMHz 2 & 3 1 & 2 2 & 3 2 & 3 1 & 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION (CON’T) Speed JP31 JP32 JP33 JP34 JP35 20MHz 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 25MHz 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 33MHz 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 40MHz 1 & 2 2 & 3 2 & 3 1 & 2 1 & 2 50iMHz 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 50MHz 1 & 2 2 & 3 2 & 3 1 & 2 1 & 2 66iMHz 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 Note: Pins designated should be in the closed position. VESA WAIT STATE CONFIGURATION Wait states JP46 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP45 <= 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed BIOS CONFIGURATION Type JP36 JP43 EPROM pins 1 & 2 closed Open Flash ROM pins 2 & 3 closed Closed PCI IRQ CONFIGURATION (INT A) IRQ JP14 IRQ5 pins 1 & 2 closed IRQ9 pins 3 & 4 closed IRQ10 pins 5 & 6 closed PCI IRQ CONFIGURATION (INT B) IRQ JP14 IRQ11 pins 7 & 8 closed IRQ12 pins 9 & 10 closed PCI IRQ CONFIGURATION (INT C) IRQ JP14 IRQ14 pins 11 & 12 closed IRQ15 pins 13 & 14 closed PCI IRQ CONFIGURATION (INT D) Interrupt JP14 INT4J pins 17 & 18 closed