PC WARE INTERNATIONAL, INC. MB-U498WB Processor UMC U5/80486SX/AM486DX/80486DX/CX486DX2(M7)/AM486DX2/ 80486DX2/SL80486DX2/AM486DX4/SL80486DX4/P24D/P24T/ CX5X86 Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ Speed 100(internal)/120(internal)MHz Chip Set OPTI Video Chip None Set Maximum 64MB Onboard Memory Maximum None Video Memory Cache 64/128/256/512/1024KB BIOS AMI Dimensions 254mm x 218mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery JP1 Reset switch JP20 Power LED & keylock JP15 Turbo switch JP22 Speaker JP18 Green PC connector JP23 Turbo LED JP19 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Label Position Battery type select internal JP1 Closed Battery type select external JP1 Pins 2 & 3 closed CMOS memory clear JP1 Pins 3 & 4 closed » Factory configured - do not JP2 Open alter Flash BIOS voltage select 12v JP3 Pins 2 & 3 closed Flash BIOS voltage select 5v JP3 Pins 1 & 2 closed » Factory configured - do not JP36 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB (1) 256K x 36 None None 1MB None (1) 256K x 36 None 2MB (1) 256K x 36 (1) 256K x 36 None 2MB None (1) 256K x 36 (4) 256K x 9 3MB (1) 256K x 36 (1) 256K x 36 (4) 256K x 9 4MB (1) 1M x 36 None None 4MB None (1) 1M x 36 None 5MB (1) 1M x 36 (1) 256K x 36 None 6MB (1) 256K x 36 (1) 256K x 36 (1) 1M x 9 6MB (1) 1M x 36 (1) 256K x 36 (4) 256K x 9 8MB (1) 2M x 36 None None 8MB (1) 1M x 36 (1) 1M x 36 None 9MB (1) 2M x 36 (1) 256K x 36 None 9MB (1) 1M x 36 (1) 256K x 36 (1) 1M x 9 9MB (1) 1M x 36 (1) 1M x 36 (4) 256K x 9 12MB (1) 2M x 36 (1) 1M x 36 None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 9 16MB (1) 4M x 36 None None 16MB None (1) 4M x 36 None 17MB (1) 4M x 36 (1) 256K x 36 None 18MB (1) 4M x 36 (1) 256K x 36 (4) 256K x 9 20MB (1) 4M x 36 (1) 1M x 36 None 21MB (1) 1M x 36 (1) 256K x 36 (1) 4M x 9 21MB (1) 4M x 36 (1) 256K x 36 (1) 1M x 9 21MB (1) 4M x 36 (1) 1M x 36 (4) 256K x 9 24MB (1) 2M x 36 (1) 4M x 36 None 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 9 25MB (1) 4M x 36 (1) 2M x 36 (4) 256K x 9 28MB (1) 4M x 36 (1) 2M x 36 (1) 1M x 9 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 32MB (1) 8M x 36 None None 32MB (1) 4M x 36 (1) 4M x 36 None 33MB (1) 8M x 36 (1) 256K x 36 None 33MB (1) 4M x 36 (1) 4M x 36 (4) 256K x 9 36MB (1) 8M x 36 (1) 1M x 36 None 36MB (1) 1M x 36 (1) 8M x 36 None 36MB (1) 4M x 36 (1) 1M x 36 (1) 4M x 9 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 9 40MB (1) 4M x 36 (1) 2M x 36 (1) 4M x 9 48MB (1) 8M x 36 (1) 4M x 36 None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 9 52MB (1) 4M x 36 (1) 8M x 36 (1) 1M x 9 64MB (1) 8M x 36 (1) 8M x 36 None 64MB (1) 4M x 36 (1) 8M x 36 (1) 4M x 9 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (A) (1) 16K x 8 (1) 16K x 8 (1) 8K x 8 128KB (B) (4) 32K x 8 None (1) 8K x 8 256KB (A) (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 256KB (B) (4) 64K x 8 None (1) 32K x 8 512KB (A) (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 512KB (B) (4) 128K x 8 None (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 64K x 8 Note: The location of banks 0 & 1 are unidentified. CACHE JUMPER CONFIGURATION Size JP5 JP10 JP11 JP12 JP13 JP14 64KB 2 & 3 2 & 3 Open Open Open Open 128KB 2 & 3 2 & 3 Open Open Open Closed (A) 128KB 1 & 2 1 & 2 Open Open Open Closed (B) 256KB 2 & 3 2 & 3 Open Open Closed Closed (A) 256KB 1 & 2, 1 & 2 Open Closed Closed Closed (B) 3 & 4 512KB 2 & 3, 2 & 3 Open Closed Closed Closed (A) 4 & 5 512KB 1 & 2, 1 & 2 Open Closed Closed Closed (B) 3 & 4, 5 & 6 1MB 2 & 3, 2 & 3 Closed Closed Closed Closed 4 & 5, 6 & 7 Note: Pins designated should be in the closed position. CPU SPEED SELECTION Speed JP6 JP7 JP8 25MHz Open Open Closed 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Open Closed 50MHz Closed Open Open 66iMHz Closed Closed Closed 75iMHz Open Open Closed 80iMHz Open Closed Closed 100iMHz Closed Closed Closed 120iMHz Open Closed Closed CPU TYPE SELECTION Type JP27 JP28 JP29 UMC U5 Open 2 & 3 2 & 3 80486SX Open 2 & 3 Open AM486DX Open 2 & 3 Open 80486DX Open 2 & 3 Open CX486DX2 (M7) 2 & 3 1 & 2, 3 & 4, 1 & 2, 3 & 4, 5 & 6 5 & 6 AM486DX2 Open 2 & 3 Open 80486DX2 Open 2 & 3 Open SL80486DX2 1 & 2, 3 & 4 1 & 2 1 & 2 AM486DX4 1 & 2, 3 & 4 1 & 2, 4 & 5 1 & 2, 4 & 5 SL80486DX4 1 & 2, 3 & 4 1 & 2 1 & 2 P24D 1 & 2, 3 & 4 1 & 2, 4 & 5 1 & 2, 4 & 5 P24T 1 & 2, 3 & 4 1 & 2 1 & 2 CX5X86 1 & 2, 3 & 4 1 & 2, 4 & 5 1 & 2, 4 & 5 Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON’T) Type JP30 JP32 JP33 UMC U5 1 & 2 3 & 4 2 & 3 80486SX Open Open 2 & 3 AM486DX Open 1 & 2 1 & 2, 3 & 4 80486DX Open 1 & 2 1 & 2, 3 & 4 CX486DX2 (M7) 2 & 3, 4 & 5 1 & 2 1 & 2, 3 & 4 AM486DX2 Open 1 & 2 1 & 2, 3 & 4 80486DX2 Open 1 & 2 1 & 2, 3 & 4 SL80486DX2 5 & 6 1 & 2 1 & 2, 3 & 4 AM486DX4 3 & 4, 5 & 6 1 & 2 1 & 2, 3 & 4 SL80486DX4 5 & 6 1 & 2 1 & 2, 3 & 4 P24D 3 & 4, 5 & 6 1 & 2 1 & 2, 3 & 4 P24T 5 & 6 2 & 3 1 & 2, 3 & 4 CX5X86 3 & 4, 5 & 6 1 & 2 1 & 2, 3 & 4 Note: Pins designated should be in the closed position. CPU MULTIPLIER SELECTION (AMD) Multiplier JP34 2x Closed 3x Open CPU MULTIPLIER SELECTION (INTEL) Multiplier JP31 2x Pins 2 & 3 closed 2.5x Pins 1 & 2 closed 3x Open CPU VOLTAGE SELECTION Voltage JP24 JP25 JP26 JP35 3.3v Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Closed closed closed closed 4v Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Open closed closed closed 5v Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Open closed closed closed VL BUS WAIT STATE SELECTION Setting JP17 0 Open 1 Closed VL-BUS SPEED SELECTION Setting JP16 <= 33MHz Open >33 MHz Closed