486VC-H (REV. A1) Motherboard - BIOS ID string <--- please send yours in - 8-30 pin SIMM slots (1-128meg FPM DRAM) - 2-32bit VESA Local Bus slots - 6-16bit ISA slots - 2-8bit ISA slots - 64-256k cache support in 8-28pin sockets + 2 TAG RAM sockets - Award 09/16/92 Bios 'VENUS' - VIA VT82C495/VT82C481 Chipset - DALLAS Real Time Clock/CMOS Battery - OSC1 oscillator clock crystal at 16/20/25/33/40/50/66MHz - Supports Intel cpu's 80486SX/80487SX/80486DX/DX2 - Manufactured by: FIC and Hsingtech ------------------------------------------------------------------------------- CONNECTIONS ------------------------------------------------------------------------------- Purpose Location Purpose Location ------------------------------------------------------------------------------- Turbo LED J6 Speaker J9 Turbo switch J7 Power LED & keylock J10 Reset switch J8 ------------------------------------------------------------------------------- USER CONFIGURABLE SETTINGS ------------------------------------------------------------------------------- Function Jumper Position ------------------------------------------------------------------------------- * CMOS memory normal operation J1 open CMOS memory clear J1 closed * Monitor type select monochrome J2 open Monitor type select color J2 closed * CPU speed select OSC1/1 JK1 & JK2 pins 2 & 3 closed CPU speed select OSC1/2 JK1 & JK2 pins 1 & 2 closed ------------------------------------------------------------------------------- DRAM CONFIGURATION ------------------------------------------------------------------------------- Size Bank 0 Bank 1 ------------------------------------------------------------------------------- 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (4) 1M x 9 5MB (4) 1M x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 17MB (4) 256K x 9 (4) 4M x 9 17MB (4) 4M x 9 (4) 256K x 9 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE 65MB (4) 16M x 9 (4) 256K x 9 68MB (4) 16M x 9 (4) 4M x 9 80MB (4) 16M x 9 (4) 4M x 9 128MB (4) 16M x 9 (4) 16M x 9 ------------------------------------------------------------------------------- SRAM CONFIGURATION ------------------------------------------------------------------------------- Size Cache SRAM Location TAG/Dirty Bit JS1 JS2 ------------------------------------------------------------------------------- 64KB (8) 8K x 8 Banks 0 & 1 (2) 8K x 8 pins 1&2 1&2 128KB (4) 32K x 8 Bank 0 (2) 8K x 8 pins 1&2 2&3 256KB (8) 32K x 8 Banks 0 & 1 (2) 32K x 8 pins 2&3 2&3 ------------------------------------------------------------------------------- CPU TYPE CONFIGURATION ------------------------------------------------------------------------------- CPU Type JC1 JC2 JC3 ------------------------------------------------------------------------------- 80486DX2 1 & 2 closed 1 & 2 closed 1 & 2 closed 80486DX 1 & 2 closed 1 & 2 closed 1 & 2 closed 80486SX 1 & 2 closed 1 & 2 closed 2 & 3 closed 80487SX 2 & 3 closed 2 & 3 closed open =========================END OF DATA ON 486VC-H================================