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==View or Print jumper settings using Fixedsys or New Courier fonts== UM4981 AIO Ver:1.0 486 VESA Motherboard - BIOS ID String UM4981 A10 V1.2 9-16-1994 Phoenix Bios Version 4.03 - BIOS ID string UM4981 AIO v1.3 01/12/1995 Phoenix bios ver 4.03 - 4-72 pin SIMM slots (1-64meg FPM DRAM) - 2-32bit VESA Local Bus slots - 6-16bit ISA slots - 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket - PHOENIX Auto-Detect Flash Bios with Energy Mgmt. - Supports LBA Mode Control + Large Disk DOS Compatibility. - Green PC Connector - external 3.6 or 6v battery not included - UMC UM8498F 9452 chipset - Supports 3.3v/5volt CPU's and clock speeds 2x/3x. - 237pin ZIF CPU socket which supports these processors: INTEL 80486SX/SX2,80486DX/DX2/DX4,P24D SL80486SX/SX2/DX/DX2 CYRIX CX486S(M6),CX486DX/DX2(M7) AMD AM486DX/DX2,AM486DXL/DXL2 UMC GREEN CPU U5S-SUPER - Supports speeds of 25/33/40/50/66/75/100(internal)MHz. - 32bit Bus master for 2 IDE interfaces supporting 4 IDE devices. - Multi-I/O chip supports 2 - 16550 Fast UART serial ports 1 - parallel port with EPP + ECP, 1 - floppy disk interface. - Manufactured by: ELITEGROUP COMPUTER SYSTEMS INC. - WEBSITE http://www.ecs.com.tw ======================================================================= Parallel port J1 External battery JP1 Serial port 1 J2 Green PC connector JP15 Serial port 2 J3 Power LED/keylock JP30 Floppy interface J4 Speaker JP31 Primary IDE interface J5 Reset switch JP32 Secondary IDE inter J6 Turbo LED JP33 IDE interface LED JP39 32bit VESA slots SL1,SL2 ======================================================================= 5volt Flash Bios JP2 1-2 12volt Flash Bios JP2 2-3 On board I/O enabled JP3 1-2 On board I/O disabled JP3 2-3 Parallel port IRQ7 JP4 2-3 Parallel port IRQ5 JP4 1-2 Parallel port normal JP8 open Parallel port ECP mode JP8 closed Primary IDE enabled JP35 1-2 Primary IDE disabled JP35 2-3 Secondary IDE enabled JP36 1-2 Secondary IDE disabled JP36 2-3 ======================================================================= DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256Kx36 NONE NONE NONE 2MB (1) 256Kx36 (1) 256Kx36 NONE NONE 2MB NONE NONE (1) 512Kx36 NONE 3MB (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 NONE 4MB (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 4MB NONE NONE (1) 512Kx36 (1) 512Kx36 4MB (1) 1mx36 NONE NONE NONE 5MB (1) 1Mx36 (1) 256Kx36 NONE NONE 6MB (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 NONE 7MB (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 8MB (1) 1Mx36 (1) 1Mx36 NONE NONE 8MB NONE NONE NONE (1) 2Mx36 9MB (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 NONE 10MB (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 12MB (1) 1Mx36 (1) 1M x36 (1) 1Mx36 NONE 13MB (1) 1Mx36 (1) 1Mx36 (1) 1mx36 (1) 256Kx36 16MB (1) 1Mx36 (1) 1Mx36 (1) 1Mx36 (1) 1Mx36 16MB NONE NONE (1) 2Mx36 (1) 2Mx36 16MB (1) 4Mx36 NONE NONE NONE 17MB (1) 4Mx36 (1) 256Kx36 NONE NONE 18MB (1) 4Mx36 (1) 256Kx36 (1) 256Kx36 NONE 19MB (1) 4Mx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 20MB (1) 4Mx36 (1) 1Mx36 NONE NONE 21MB (1) 4Mx36 (1) 1Mx36 (1) 256Kx36 NONE 22MB (1) 4Mx36 (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 24MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 NONE 25MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 28MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 (1) 1Mx36 32MB (1) 4Mx36 (1) 4Mx36 NONE NONE 33MB (1) 4Mx36 (1) 4Mx36 (1) 256Kx36 NONE 34MB (1) 4Mx36 (1) 4Mx36 (1) 256Kx36 (1) 256Kx36 36MB (1) 4Mx36 (1) 4Mx36 (1) 1Mx36 NONE 37MB (1) 4Mx36 (1) 4Mx36 (1) 1Mx36 (1) 256Kx36 40MB (1) 4Mx36 (1) 4Mx36 (1) IMx36 (1) 1Mx36 48MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 NONE 49MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 256Kx36 52MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 1Mx36 64MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 ======================================================================= CACHE Size Bank 0 Bank 1 TAG --------------------------------------------------------- 64k 4 - 8kx8 4 - 8kx8 1 - 8kx8 128k 4 - 32kx8 none 1 - 8kx8 256k 4 - 32kx8 4 - 32kx8 1 - 32kx8 CACHE config JP22 JP23 JP24 JP25 ------------------------------------------------- 64k 2-3 open open open 128k 1-2 1-2 open closed 256k 2-3 2-3 closed closed ======================================================================= CPU Type JP16 JP17 JP18 JP19 JP20 JP21 ----------------------------------------------------------------------- 80486SX/SX2 open open 2-3 open open 2-3 80486DX/DX2 open open 2-3 open 1-2 1-2,3-4 80486DX4 1-2,3-4 5-6 1-2 1-2 1-2 1-2,3-4 P24D 1-2,3-4 3-4,5-6 1-2,4-5 1-2,4-5 1-2 1-2,3-4 P24T 1-2,3-4 5-6 1-2 1-2 2-3 1-2,3-4 CX486S 2-3,4-5 2-3,4-5 1-2,3-4,5-6 1-2,3-4 open 2-3 CX486DX/DX2 2-3 2-3,4-5 1-2,3-4,5-6 1-2,3-4 1-2 1-2,3-4 SL80486SX/SX2 1-2,3-4 5-6 1-2 1-2 open 2-3 SL80486DX/DX2 1-2,3-4 5-6 1-2 1-2 1-2 1-2,3-4 AM486DX/DX2 open open 2-3 open 1-2 1-2,3-4 AM486DXL/DXL2 open 1-2 2-3 2-3 1-2,3-4 1-2,3-4 U5S open 1-2 2-3 2-3 3-4 2-3 ======================================================================== CPU Speed JP9 JP10 JP11 ------------------------------------- 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 INTEL 80486DX4 Multiplier JP29 --------------------------------------- 2x 2-3 3x open ======================================================================= CPU Voltage JP26 --------------------------------------- 3.3v (on board regulator) 3-4 3.3v (special power supply) 5-6 5v (standard power supply) 1-2 ======================================================================= VESA Wait States JP27 ------------------------------ 0 wait state open 1 wait state closed BUS Speed Config CPU Speed JP28 ------------------------------ <= 33MHz open > 33MHz closed ECP Mode Config Setting JP5 JP6 ------------------------------------ DRQ1/DACK1 1-2 1-2 DRQ3/DACK3 2-3 2-3 ======================================================================= HARD DRIVE TIMING CONFIG Active Time Cycle Time Speed HDD Capacity JP37 JP38 --------------------------------------------------------------------- 15T 30T 1 40/50MHz 2-3 2-3 15T 19T 2 25/33MHz 1-2 2-3 9T 13T 3 <20MHz/enhanced IDE 2-3 1-2 18T 37T 0 <40MHz/non ATA support 1-2 1-2 (if anyone can supply more detailed info from their manual send it in) ======================================================================= |