UNIDENTIFIED 486 VESA (REV. VL 421A/422) Processor CX486S/80486SX/80487SX/80486DX/80486DX2/P24T Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set Forex Video Chip Set None Maximum Onboard Memory 36MB Maximum Video Memory None Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery JP2 Turbo switch JP15 Reset switch JP3 Turbo LED JP16 Power LED & keylock JP9 32-bit VESA local SL1 & SL2 bus slots Speaker JP10 USER CONFIGURABLE SETTINGS Function Label Position Battery type select internal JP2 Pins 1 & 2 closed Battery type select external JP2 Closed » Factory configured - do not JP5 Unidentified alter » Factory configured - do not JP6 Unidentified alter (CMOS) DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB None (4) 256K x 9 None 2MB None (4) 256K x 9 (4) 256K x 9 4MB (8) 411000 None None 4MB None (4) 1M x 9 None 5MB (8) 411000 (4) 256K x 9 None 5MB None (4) 1M x 9 (4) 256K x 9 8MB (8) 411000 (4) 1M x 9 None 8MB None (4) 1M x 9 (4) 1M x 9 12MB (8) 411000 (4) 1M x 9 (4) 1M x 9 16MB None (4) 4M x 9 None 20MB (8) 411000 (4) 4M x 9 None 32MB None (4) 4M x 9 (4) 4M x 9 36MB (8) 411000 (4) 4M x 9 (4) 4M x 9 Note: The location of banks 1 & 2 are unidentified. DRAM JUMPER SELECTION Setting JP105 DIPPs used as bank 0 Pins 1 & 2 closed SIMMs used as bank 0 Pins 2 & 3 closed 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 CACHE JUMPER CONFIGURATION Size JP8A JP8B JP8D JP8E 64KB Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 128KB Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 256KB Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed closed CPU SPEED SELECTION Speed JP7A JP7B JP7C 20MHz Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 closed closed closed 25MHz Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed 33MHz Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed 40MHz Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed 50iMHz Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed 50MHz Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed 66iMHz Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed CPU TYPE SELECTION Type JP12 JP13 JP29 CX486S N/A N/A N/A 80486 (PQFP) Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed 80486SX Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed 80487SX Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 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 P24T N/A N/A N/A CPU TYPE SELECTION (CON’T) Type JP30 JP104 JP109 JP110 CX486S N/A N/A N/A Pins 1 & 2 closed 80486 (PQFP) Pins 2 & 3 N/A N/A N/A closed 80486SX Pins 2 & 3 N/A N/A N/A closed 80487SX Pins 2 & 3 N/A N/A N/A closed 80486DX Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed closed 80486DX2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed closed P24T N/A Pins 2 & 3 Pins 2 & 3 N/A closed closed VL BUS WAIT STATE SELECTION Setting JP102 JP103 0 Pins 1 & 2 closed Pins 1 & 2 closed 1 Pins 2 & 3 closed Pins 2 & 3 closed