MECER CORPORATION B880 Processor SL80486SX/80486SX/CX486DX/SL80486DX/80486DX/SL80486DX2/ 80486DX2/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set Contaq Max. Onboard 128MB DRAM Cache 128/256/512/1024KB BIOS Unidentified Dimensions 330mm x 218mm 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 Auxiliary keyboard JP1 Turbo LED JP59 pins 11 - connector 12 External battery JP3 Green PC LED JP59 pins 13 - 14 External battery JP4 Turbo switch JP59 pins 16 - 17 Green PC connector JP6 Reset switch JP59 pins 19 - 20 Power LED & keylock JP59 pins 1 - 32-bit PCI slots PC1 - PC3 4 Speaker JP59 pins 7 - 32-bit VESA SL1 & SL2 10 local bus slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP2 pins 1 & 2 closed CMOS memory clear JP2 pins 2 & 3 closed » PQFP CPU disabled JP33 Closed PQFP CPU enabled JP33 Open » PCI clock delay select 1 delay JP43 pins 1 & 2 closed PCI clock delay select 3 delays JP43 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (1) 256K x 36 2MB (1) 256K x 36 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (1) 1M x 36 5MB (1) 1M x 36 (4) 256K x 9 8MB (4) 1M x 9 (1) 1M x 36 8MB (1) 1M x 36 (4) 1M x 9 16MB (4) 4M x 9 NONE 17MB (4) 256K x 9 (1) 4M x 36 17MB (1) 4M x 36 (4) 256K x 9 20MB (4) 1M x 9 (1) 4M x 36 20MB (1) 4M x 36 (4) 1M x 9 32MB (4) 4M x 9 (1) 4M x 36 32MB (1) 4M x 36 (4) 4M x 9 64MB (4) 16M x 9 NONE 65MB (4) 256K x 9 (1) 16M x 36 65MB (1) 16M x 36 (4) 256K x 9 68MB (4) 1M x 9 (1) 16M x 36 68MB (1) 16M x 36 (4) 1M x 9 80MB (4) 4M x 9 (1) 16M x 36 80MB (1) 16M x 36 (4) 4M x 9 128MB (4) 16M x 9 (1) 16M x 36 128MB (1) 16M x 36 (4) 16M x 9 DRAM JUMPER CONFIGURATION Type JP10 JP11 Bank 0 = 30-pin & Bank pins 1 & 2 closed pins 2 & 3 closed 1 = 72-pin Bank 0 = 72-pin & Bank pins 2 & 3 closed pins 1 & 2 closed 1 = 30-pin Bank 0/1 = double side Open pins 1 & 2, 3 & 4 72-pin closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 64K x 8 512KB (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 128K x 8 CACHE JUMPER CONFIGURATION Size JP49 JP50 JP51 128KB pins 1 & 2 pins 2 & 3 Open closed closed 256KB pins 1 & 2 pins 1 & 2 Open closed closed 256KB pins 1 & 2 pins 2 & 3 Open closed closed 512KB pins 2 & 3 Open pins 1 & 2 closed closed 512KB pins 2 & 3 pins 2 & 3 Open closed closed 1MB pins 2 & 3 Open pins 2 & 3 closed closed CPU TYPE CONFIGURATION Type JP35 JP36 JP41 JP52 80486SX 1 & 2 Open 1 & 2 1 & 2, 3 & 4 SL80486SX 2 & 3 Open 1 & 2 2 & 3 CX486DX 2 & 3 1 & 2 2 & 3 1 & 2, 3 & 4 80486DX 2 & 3 Open 1 & 2 1 & 2, 3 & 4 SL80486DX 2 & 3 Open 1 & 2 1 & 2, 3 & 4 80486DX2 1 & 2 Open 1 & 2 1 & 2, 3 & 4 SL80486DX2 2 & 3 Open 1 & 2 1 & 2, 3 & 4 P24D (WB) 2 & 3 2 & 3 1 & 2 1 & 2, 3 & 4 P24D (WT) 2 & 3 2 & 3 1 & 2 1 & 2, 3 & 4 Pentium Overdrive 2 & 3 1 & 2 1 & 2 1 & 2, 3 & (WB) 4 Pentium Overdrive 2 & 3 1 & 2 1 & 2 1 & 2, 3 & (WT) 4 Note: WB = write back & WT = write through. Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP53 JP55 JP56 JP57 80486SX Open Open Open Open SL80486SX 1 & 2 Open 3 & 4, 5 & Open 6 CX486DX 2 & 3 2 & 3 4 & 5 5 & 6 80486DX Open 2 & 3 Open Open SL80486DX 1 & 2 2 & 3 3 & 4, 5 & Open 6 80486DX2 Open 2 & 3 Open Open SL80486DX2 1 & 2 2 & 3 3 & 4, 5 & Open 6 P24D (WB) 1 & 2, 3 & 2 & 3 3 & 4, 5 & 2 & 3, 4 & 4 6 5 P24D (WT) 1 & 2, 3 & 2 & 3 3 & 4, 5 & 1 & 2, 4 & 4 6 5 Pentium Overdrive 1 & 2 1 & 2 5 & 6 3 & 4 (WB) Pentium Overdrive 1 & 2 1 & 2 5 & 6 1 & 2 (WT) Note: WB = write back & WT = write through. Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP17 JP22 JP39 JP40 JP47 25MHz Closed Closed 1 & 2 2 & 3 2 & 3 33MHz Closed Open 2 & 3 1 & 2 2 & 3 40MHz Open Open 1 & 2 2 & 3 1 & 2 50iMHz Closed Closed 1 & 2 2 & 3 2 & 3 50MHz Open Open 2 & 3 1 & 2 1 & 2 66iMHz Closed Open 2 & 3 1 & 2 2 & 3 Note: Pins designated should be in the closed position. VESA WAIT STATE CONFIGURATION Wait states JP60 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP61 <= 33MHz Open > 33MHz Closed PCI IRQ CONFIGURATION (IRQ3) IRQ JP10A IRQ3 PCI compliant pins 1 & 2 closed IRQ3 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ4) IRQ JP10B IRQ4 PCI compliant pins 1 & 2 closed IRQ4 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ5) IRQ JP10C IRQ5 PCI compliant pins 1 & 2 closed IRQ5 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ7) IRQ JP10D IRQ7 PCI compliant pins 1 & 2 closed IRQ7 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ10) IRQ JP10E IRQ10 PCI compliant pins 1 & 2 closed IRQ10 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ11) IRQ JP10F IRQ11 PCI compliant pins 1 & 2 closed IRQ11 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ12) IRQ JP10G IRQ12 PCI compliant pins 1 & 2 closed IRQ12 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ15) IRQ JP10H IRQ15 PCI compliant pins 1 & 2 closed IRQ15 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ9) IRQ JP10I IRQ9 PCI compliant pins 1 & 2 closed IRQ9 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ6) IRQ JP10J IRQ6 PCI compliant pins 1 & 2 closed IRQ6 PCI non compliant pins 2 & 3 closed PCI IRQ CONFIGURATION (IRQ14) IRQ JP10K IRQ14 PCI compliant pins 1 & 2 closed IRQ14 PCI non compliant (1 card pins 2 & 3 closed installed) IRQ14 PCI non compliant (2 cards pins 2 & 4 closed installed) PCI COMPLIANCE CONFIGURATION Slot JP7 Slot 1 compliant pins 1 & 2 closed Slot 1 non-compliant pins 2 & 3 closed Slot 2 compliant pins 4 & 5 closed Slot 2 non-compliant pins 5 & 6 closed Slot 3 compliant pins 7 & 8 closed Slot 3 non-compliant pins 8 & 9 closed Slot 3 non-compliant * pins 11 & 12 closed Note: * Slot 3 has a second non-compliant PCI card installed.