==View or Print jumper settings using Fixedsys or New Courier fonts== SIS 486-471 VL BUS 5/3.3V Ver:G Motherboard - BIOS ID string 08/18/95-SIS-85C471B/E/G-2C419F32-00 - 2-72 pin SIMM slots (1-128meg FPM DRAM) - 4-30 pin SIMM slots - 3-32bit VESA Local Bus slots note: - 7-16bit ISA slots - 64k-1024k CACHE support in 8-32pin sockets - Award 1995 Auto-Detect BIOS. - Green PC Connector - SiS 85C471 chipset - Supports 3.3v/5volt CPU's - ZIF 237pin CPU socket 3 which supports these processors: INTEL 80486SX/SX2,80486DX/DX2/DX4,P24D CYRIX CX486S(M6),CX486DX(M7),CX486-V66/V80, 5X86-100GP AMD DX2 66/80, AMD DX4-100, AMD DX4-120 W/T, AMD DX4-120 W/B - Supports speeds of 20/25/33/40/50 MHz. - Manufactured by: ? (unknown) ======================================================================= External Battery J1 TURBO switch disabled J6 1-2 TURBO switch enabled J6 2-3 (1-2-3 with Turbo switch) TURBO used for break switch J6 4-5 CMOS normal JP38 1-2 CMOS clear JP38 2-3 Monitor EGA/VGA/Monochrome JP39 open Monitor CGA JP39 closed RC pin break switch enabled JP40 1-2 RC pin used for RC JP40 2-3 ----------------------------------------------- ( these over-ride the CPU jumpers below ) CX486S2 CPU installed JP5 closed P24D only JP4 closed P24D only (pins 1-2) JP6 closed ----------------------------------------------- ======================================================================= Config Bank 0 Bank 1 Bank 2 -------------------------------------------------------------- 1 (30pin) (30pins) no other slots 2 SIMM5,6,7,8 SIMM10 SIMM9 3 SIMM9 SIMM10 SIMM5,6,7,8 DRAM SLOT Select Config JP36 JP37 ----------------------------------------------------- 30pin / 30pin 1 1-2 open 30pin / 72pin / 72pin 2 1-2 2-3 72pin / 72pin / 30pin 3 2-3 1-2 DRAM configurations indicate support for: 30pin simms 72pin simms ----------------------------------- 256k x 9 256k x 36 1M x 9 1M x 36 4M x 9 4M x 36 8M x 9 8M x 36 16M x 9 16M x 36 * note: 8meg 30pin simms only work with all 4 slots of BANK 0 filled and one 8meg 72pin simm installed in BANK 1 (DRAM Config #2). ======================================================================= Cache Memory Configuration - Yellow (cache) and Red(tag) Jumper Caps Cache Bank 0 Bank 1 TAG --------------------------------------------------------- 64K 4 - 8kx8 4 - 8kx8 1 - 4kx8 128K 4 - 32kx8 none 1 - 8kx8 256K 4 - 32kx8 4 - 32kx8 1 - 16kx8 256K 4 - 32kx8 4 - 32kx8 1 - 32kx8 512K 4 - 128kx8 none 1 - 32kx8 1024K 128k*8 128k*8 128k*8 Cache JP1 JP2 JP3 JP25 JP26 JP27 JP28 TAG SRAM ----------------------------------------------------------------------- 64K 1-2 2-3 2-3,4-5 1-2 1-2 1-2 open 8k*8-20 128K 2-3 1-2 1-2,3-4 2-3 1-2 1-2 open 8/16k*8-20 256K 2-3 2-3 2-3,4-5 2-3 2-3 1-2 open 32k*8-20 256K 2-3 2-3 2-3,4-5 1-2 open open closed 16k*8-20 512K 2-3 1-2 1-2,3-4 2-3 2-3 2-3 open 32k*8-20 1024K 2-3 2-3 2-3,4-5 2-3 2-3 2-3 open 128k*8-20 ======================================================================= CPU Configuration - Green Jumper Caps CPU Type JP4 JP5 JP6 JP7 JP8 ----------------------------------------------------------------- 80486SX open open open 3-4 open 80486DX/DX2 open open open 1-2,3-4 open 80486DX4 open open open 1-2,3-4 2-3 CX486SX open open open 1-2 2-3 CX486DX/DX2 open open open 1-2,3-4 2-3 CX486DX2-V66 open open open 1-2,3-4 2-3 CX486DX2-V80 open open open 1-2,3-4 2-3 SLE486SX open open open 2-3 open SLE486DX/DX2 open open open 1-2,3-4 open P24D/CX 5X86-100GP open open 1-2 1-2,3-4 1-2 P24T open open open 1-2,3-4 1-2 CX486DX4-100P open open open 1-2,3-4 2-3 AMD DX4-100 open open open 1-2,3-4 open AMD DX4-120 W/T open open open 1-2,3-4 open AMD DX4-120 W/B open open open 1-2,3-4 1-2 CPU Type JP9 JP10 JP11 JP12 JP13 JP14 JP16 JP17 ------------------------------------------------------------------------- 80486SX 2-3 1-2 open open open open open open 80486DX/DX2 2-3 1-2 open 3-4 open open open open 80486DX4 2-3 1-2 open 3-4 2-3 3-4 1-2 4-5 CX486SX 2-3 1-2 2-3 open 1-2,3-4 2-3,4-5 open 2-3 CX486DX/DX2 2-3 1-2 2-3 3-4 1-2,3-4 2-3 open 2-3 CX486DX2-V66 2-3 1-2 2-3 3-4 1-2,3-4 2-3 open 2-3 CX486DX2-V80 2-3 1-2 2-3 3-4 1-2,3-4 2-3 open 2-3 SLE486SX 2-3 1-2 open open 2-3 3-4 1-2 4-5 SLE486DX/DX2 2-3 1-2 open 3-4 2-3 3-4 1-2 4-5 P24D and CX5X86-100GP 2-3 1-2 open 3-4 2-3 1-2,3-4 open 1-2 P24T 1-2 1-2 open 3-4 2-3 1-2,3-4 open 1-2 CX486DX4-100P 2-3 1-2 2-3 3-4 1-2,3-4 2-3 open 2-3 AMD DX4-100 2-3 2-3 3-4 1-2,3-4 open open open open AMD DX4-120W/T 2-3 1-2 open 3-4 2-3 3-4 1-2 4-5 AMD DX4-120W/B 2-3 1-2 open 3-4 2-3 1-2,3-4 2-3 4-5 CPU Type JP18 JP19 JP33 JP34 JP41 JP42 JP43 ------------------------------------------------------------------------------- 80486SX closed 2-3 2-3 1-2 2-3,5-6 open open 80486DX/DX2 closed 2-3 2-3 1-2 2-3,5-6 open open 80486DX4 open 2-3 2-3 1-2 1-2,4-5 open open CX486SX closed 2-3 1-2 2-3 2-3,5-6 open open CX486DX/DX2 closed 2-3 1-2 2-3 2-3,5-6 open open CX486DX2-V66 closed 2-3 1-2 2-3 1-2,4-5 closed open CX486DX2-V80 closed 2-3 1-2 2-3 1-2,4-5 closed open SLE486SX closed 2-3 2-3 1-2 2-3,5-6 open open SLE486DX/DX2 closed 2-3 2-3 1-2 2-3,5-6 open open P24D/CX 5X86-100GP closed 2-3 1-2 1-2 1-2,4-5 open open P24T closed 2-3 1-2 1-2 2-3,5-6 open open CX486DX4-100P closed 2-3 1-2 2-3 1-2,4-5 open open AMD DX4-100 closed 2-3 1-2 2-3 1-2,4-5 open open AMD DX4-120 W/T open 2-3 1-2 2-3 1-2,4-5 open open AMD DX4-120 W/B closed 2-3 1-2 1-2 1-2,4-5 open open ======================================================================= CPU Speed for Clock Chips: U16-AVASEM, AV9107-03, KTS0147C - Blue Jumper Caps Speed JP22 JP23 JP24 ------------------------------------------ 20MHz closed open closed 25MHz closed closed open 33MHz open closed closed 40MHz closed open open 50MHz open open closed CPU Speed for Clock Chip: U17-MX8315 Speed JP22 JP23 JP24 ---------------------------------------- 20MHz open open open 25MHz open closed open 33MHz closed closed closed 40MHz open closed closed 50MHz closed open open ======================================================================= CPU voltage JP41 ------------------------------- 3.3 volts 1-2,4-5 5.0 volts 2-3,5-6 (note: if the voltage regulators Q4, Q5 and/or Q6 ) ( are installed set JP41 to 1-2,4-5. ) Those are the various DX4 (3.3volt) voltage regulators. Q6 is usually the only one used but I suppose the others might be found on older boards. Q4 - part# IRF540 or IRF520 Q5 - part# 2N2222 or TO-92 Q6 - part# LT1085CT ======================================================================= VESA Wait States JP31 -------------------------------- 0 wait state 1-2 1 wait state 2-3 CPU Speed JP32 (BUS SPEED) ----------------------------------------- <= 33MHz 1-2 > 33MHz 2-3 ======================================================================= |