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==View or Print jumper settings using Fixedsys or New Courier fonts== BIOSTAR MB-1425/33/40/50UIV 486 VESA Motherboard - AMI BIOS ID string 40-P101-001223-00101111-072594-UMC498-H - AMI BIOS ID string 40-P301-001223-00101111-072594-UMC498-H - 2-72 pin SIMM slots (1-64meg FPM DRAM) - 4-30 pin SIMM slots or 8-30 pin SIMM slots - 3-32bit VESA Local Bus slots - 7-16bit ISA slots - 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket - AMI Bios - UMC UM8494/8496 Chipset (thanks Roger) - Supports 3.45v/5volt CPU's - 237pin ZIF CPU socket which supports these processors: INTEL 80486SX,80486DX/DX2/DX4,P24D, Pentium Overdrive CYRIX CX486S(M6),CX486DX(M7) AMD AM486DX,AM486DXL,AM486DX2-66/80 - Supports speeds of 25/33/40/50/66/75/100(internal)MHz. - Manufactured by: BIOSTAR Microtech International Corp - Website http://www.bioteq.com/manuals/ ------------------------------------------------------------------------ CONNECTIONS ------------------------------------------------------------------------ Purpose Location Purpose Location ------------------------------------------------------------------------ External battery JP8 Turbo switch JP15 (14-16) Speaker JP15 (1-4) +5v ground JP15 (17-18) Power LED + keylock JP15 (5-9) Green PC connector JP24 Turbo LED JP15 (10-11) Green PC connector JP25 Reset switch JP15 (12-13) 32-bit VESA slots SL1 - SL3 ------------------------------------------------------------------------ USER CONFIGURABLE SETTINGS ------------------------------------------------------------------------ Function Jumper Position ------------------------------------------------------------------------ * CMOS memory normal operation JP8 2 + 3 CMOS memory clear JP8 3 + 4 Battery type select external JP8 pin1 + / pin4 - * Factory configured - do not alter JP31 Open * Factory configured - do not alter JP32 Open * VESA bus clock type select synchronous JP36 1 + 2 VESA bus clock type select asynchronous JP36 2 + 3 ------------------------------------------------------------------------ Motherboard Revision and Pin Existence ------------------------------------------------------------------------ Version JP20 JP23 JP40 Remark ------------------------------------------------------------------------ 1 No No No 2 No No No 3 No Yes No Support AMD 3V CPU 5 Yes (2 Pin) No No Support AMD 3V CPU 6 Yes (2 Pin) No No Support AMD 3V + Cyrix 4V CPU 7 Yes (3 Pin) No Yes Above + AMD Enhanced CPU ------------------------------------------------------------------------ DRAM CONFIGURATION ------------------------------------------------------------------------ Size Bank 0/2 Bank 1/3 Bank 2 ------------------------------------------------------------------------ 1MB (1) 256Kx36 NONE NONE 1MB NONE (1) 256Kx36 NONE 1MB NONE NONE (4) 256Kx9 2MB (1) 25Kx36 NONE (4) 256Kx9 2MB NONE (1) 256Kx36 (4) 256Kx9 2MB (1) 256Kx36 (1) 256Kx36 NONE 2MB (1) 512Kx36 NONE NONE 2MB NONE (1) 512Kx36 NONE 3MB (1) 256Kx36 (1) 256Kx36 (4) 256Kx9 3MB NONE (1) 512Kx36 (4) 256Kx9 3MB (1) 256Kx36 (1) 512Kx36 (4) 256Kx9 3MB (1) 512Kx36 (1) 256Kx36 NONE 4MB (1) 256Kx36 (1) 512Kx36 (4) 256Kx9 4MB NONE NONE (4) 1Mx9 4MB (1) 512Kx36 (1) 512Kx36 NONE 4MB (1) 1Mx36 NONE NONE 4MB NONE (1) 1Mx36 NONE 5MB (1) 1Mx36 NONE (4) 256Kx9 5MB NONE (1) 1Mx36 (4) 256Kx9 5MB (1) 256Kx36 NONE (4) 1Mx9 5MB NONE (1) 256Kx36 (4) 1Mx9 5MB (1) 256Kx36 (1) 1Mx36 NONE 5MB (1) 1Mx36 (1) 256Kx36 NONE 6MB NONE (1) 512Kx36 (4) 1Mx9 6MB (1) 1Mx36 (1) 512Kx36 NONE 6MB (1) 512Kx36 (1) 1Mx36 NONE 7MB (1) 1Mx36 (1) 512Kx36 (4) 256Kx9 7MB (1) 256Kx36 (1) 512Kx36 (4) 1Mx9 8MB (1) 1Mx36 NONE (4) 1Mx9 8MB NONE (1) 1Mx36 (4) 1Mx9 8MB (1) 1Mx36 (1) 1mx36 NONE 8MB (1) 2Mx36 NONE NONE 8MB NONE (1) 2Mx36 NONE 9MB (1) 1Mx36 (1) 1Mx36 (4) 256Kx9 9MB (1) 1mx36 (1) 256Kx36 (4) 1Mx9 9MB (1) 256Kx36 (1) 1Mx36 (4) 1Mx9 10MB (1) 1Mx36 (1) 512Kx36 (4) 1Mx9 12MB (1) 1mx36 (1) 1Mx36 (4) 1Mx9 12MB NONE (1) 2Mx36 (4) 4Mx9 12MB (1) 1Mx36 (1) 2Mx36 NONE 12MB (1) 2Mx36 (1) 1Mx36 NONE 16MB NONE NONE (4) 4Mx9 16MB (1) 4Mx36 NONE NONE 16MB NONE (1) 4Mx36 NONE 17MB (1) 4Mx36 NONE (4) 256Kx9 17MB NONE (1) 4Mx36 (4) 256Kx9 17MB (1) 256Kx36 NONE (4) 4Mx9 17MB NONE (1) 256Kx36 (4) 4Mx9 18MB (1) 256Kx36 (1) 4Mx36 (4) 256Kx9 18MB (1) 4Mx36 (1) 256Kx36 (4) 256Kx9 19MB (1) 4Mx36 (1) 2Mx36 (4) 256Kx9 20MB (1) 4Mx36 (1) 1Mx36 (4) 1Mx9 20MB NONE NONE (4) 1mx9 20MB (1) 1Mx36 (1) 4Mx36 (4) 4mx9 20MB NONE NONE (4) 4mx9 21MB (1) 1Mx36 (1) 4Mx36 (4) 256Kx9 21MB (1) 4Mx36 (1) 1Mx36 (4) 256Kx9 24MB (1) 1mx36 (1) 4Mx36 (4) 1Mx9 24MB (1) 4Mx36 (1) 1Mx36 (4) 1Mx9 32MB (1) 4Mx36 NONE (4) 4Mx9 32MB NONE (1) 4Mx36 (4) 4Mx9 32MB (1) 4Mx36 (1) 4Mx36 NONE 32MB (1) 8Mx36 NONE NONE 32MB NONE (1) 8Mx36 NONE 33MB (1) 8Mx36 NONE (4) 256Kx9 33MB NONE (1) 8Mx36 (4) 256Kx9 33MB (1) 4Mx36 (1) 4Mx36 (4) 256Kx9 33MB (1) 4Mx36 (1) 256Kx36 (4) 4Mx9 33MB (1) 256Kx36 (1) 4Mx36 (4) 4Mx9 34MB (1) 4Mx36 (1) 512Kx36 (4) 4Mx9 36MB (1) 4Mx36 (1) 1mx36 (4) 4Mx9 36MB (1) 1Mx36 (1) 4Mx36 (4) 4Mx9 36MB NONE (1) 8Mx36 (4) 1Mx9 36MB (1) 4Mx36 (1) 4Mx36 (4) 1Mx9 48MB (1) 4Mx36 (1) 4Mx36 (4) 4mx9 48MB NONE (1) 8Mx36 (4) 4Mx9 48MB (1) 4Mx36 (1) 8Mx36 NONE 48MB (1) 8Mx36 (1) 4Mx36 NONE 64MB (1) 8mx36 (1) 8Mx36 NONE ------------------------------------------------------------------------ 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 256KB (4) 64K x 8 NONE (1) 32K x 8 ------------------------------------------------------------------------ CACHE JUMPER CONFIGURATION ------------------------------------------------------------------------ Size JP7 JP9 JP10 JP33 ------------------------------------------------------------------------ 64KB Open Open 2+3 Open 128KB Open 1+2 1+2 Closed 256KB Closed 1+2,3+4 1+2 Closed 256KB Closed 2+3 2+3 Closed ------------------------------------------------------------------------ CPU TYPE CONFIGURATION ------------------------------------------------------------------------ Type JP11 JP12 JP13 ------------------------------------------------------------------------ CX486M6 1+2,3+4,5+6 1+2,3+4,5+6 2+3 UMC486 2+3 2+3 2+3 80486SX Open 2+3 2+3 CX486M7 1+2,3+4,5+6 1+2,3+4,5+6 1+2,3+4 AMD486DXL 2+3 2+3 1+2,3+4 SL80486DX 1+2 1+2 1+2,3+4 SL80486DX2 1+2 1+2 1+2,3+4 80486DX Open 2+3 1+2,3+4 80486DX2 Open 2+3 1+2,3+4 80486DX4 1+2 1+2 1+2,3+4 P24D 1+2,4+5 1+2,4+5 1+2,3+4 Pentium Overdrive 1+2 1+2 1+2,3+4 ------------------------------------------------------------------------ CPU TYPE CONFIGURATION (CON'T) ------------------------------------------------------------------------ Type JP17 JP18 JP19 JP35 ------------------------------------------------------------------------ CX486M6 Open 2+3,4+5 2+3,4+5 Open UMC486 3+4 1+2 Open Closed 80486SX Open Open Open Closed CX486M7 1+2 2+3,4+5 2+3 Open AMD486DXL 1+2,3+4 1+2 Open Closed SL80486DX 1+2 5+6 1+2,3+4 Open SL80486DX2 1+2 5+6 1+2,3+4 Open 80486DX 1+2 Open Open Closed 80486DX2 1+2 open Open Closed 80486DX4 1+2 5+6 1+2,3+4 Open P24D 1+2 3+4,5+6 1+2,3+4 Open Pentium Overdrive 2+3 5+6 1+2,3+4 Open ------------------------------------------------------------------------ CPU TYPE CONFIGURATION ------------------------------------------------------------------------ Type JP20 JP23 ------------------------------------------------------------------------ All CPU Open Open AM80486DX2-66/80 only Closed Closed ------------------------------------------------------------------------ CPU SPEED CONFIGURATION ------------------------------------------------------------------------ Speed JP4 JP5 JP6 ------------------------------------------------------------------------ 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 100iMHz Closed Closed Closed ------------------------------------------------------------------------ CPU VOLTAGE CONFIGURATION ------------------------------------------------------------------------ Voltage JP14 JP16 JP27 ------------------------------------------------------------------------ 3.45v 1 + 2 1 + 2 1 + 2 5v 2 + 3 2 + 3 2 + 3 ------------------------------------------------------------------------ VESA WAIT STATE CONFIGURATION ------------------------------------------------------------------------ Wait states JP22 ------------------------------------------------------------------------ 0 wait states Open 1 wait state Closed ------------------------------------------------------------------------ BUS SPEED CONFIGURATION ------------------------------------------------------------------------ CPU speed JP21 ------------------------------------------------------------------------ <= 33MHz Open > 33MHz Closed ==============END OF DATA ON MB-1425/1433/1440/1450UIV================== 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