FIRST INTERNATIONAL COMPUTER, INC. 486-GAC-V Processor 80486SX/CX486S/SL enhanced/80486DX 80486DX2/80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/66(internal)/100(internal)MHz Speed Chip Set VIA Max. Onboard 64MB DRAM Cache 64/128/256KB BIOS Award Dimensions 330mm x 218mm I/O Options 3.3V Daughter board connector, 32-bit VESA local bus slot, floppy drive interface,IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 keyboard CN1 Green power supply J3 connector connector PS/2 mouse CN2 IDE interface LED J6 connector Serial port 1 CN3 Turbo switch J11 Serial port 2 CN4 Turbo LED J12 Parallel port CN5 Reset switch J13 VGA port CN6 Speaker J14 Video feature CN8 Power LED & keylock J15 connector (8514A) Floppy drive CN9 ISA Bus slot SL1 interface IDE interface CN10 32-bit VESA Local SL2 bus slot 3.3V Daughter board CN11 connector USER CONFIGURABLE SETTINGS Function Jumper Position » I/O Channel not set to Adaptec J1 Open (transfer rate < 5.7 MB/s) I/O Channel set to Adaptec ISA J1 Closed Master (1542B/C SCSI) » IDE not connected to BALE signal J4 Open IDE connected to BALE signal J4 Closed » IDE not connected to IOCHRDY J5 Open signal IDE connected to IOCHRDY signal J5 Closed » Password enabled J7 Open Password clear J7 Closed » Factory configured do not alter J9 pins 1 & 2 closed Pentium Overdrive write-back JC7 Closed Pentium Overdrive write-through JC7 Open » Local IDE enabled JD3 pins 2 & 3 closed Local IDE disabled JD3 pins 1 & 2 closed » NS87312 I/O port address - index JN6 pins 1 & 2 port 26eh, data port 26Fh closed NS87312 I/O port address - index JN6 pins 2 & 3 port 398h, data port 399h closed » IRQ9 disabled JV1 Open IRQ9 enabled JV1 Closed » Onboard VGA enabled JV2 pins 2 & 3 closed Onboard VGA disabled JV2 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 1M x 36 (1) 256K x NONE NONE 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 12MB NONE (1) 1M x 36 (1) 2M x 36 NONE 12MB NONE NONE (1) 1M x 36 (1) 2M x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 16MB NONE (1) 1M x 36 (1) 2M x 36 (1) 1M x 36 16MB NONE NONE (1) 2M x 36 (1) 2M x 36 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB NONE NONE (1) 8M x 36 NONE 32MB NONE NONE NONE (1) 8M x 36 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 48MB NONE (1) 4M x 36 (1) 8M x 36 NONE 48MB NONE NONE (1) 4M x 36 (1) 8M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG (M9) 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 JS1 JS2 JS3 64KB pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 128KB pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed 256KB pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states JL1 JL2 < 33MHz 0 wait states pins 1 & 2 pins 1 & 2 closed closed > 33MHz 1 wait state pins 2 & 3 pins 2 & 3 closed closed CPU TYPE CONFIGURATION Type JC1 JC2 JC3 JC4 80486SX pins 2 & 3 pins 2 & 3 Open pins 1 & 2 closed closed closed Cx486S pins 2 & 3 pins 2 & 3 Open pins 1 & 2 closed closed closed Cx487S pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed Cx486DX pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed AM486DXL pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed 80486DX pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed 80486DX2 pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed 80486DX4 pins 1 & 2 pins 1 & 2 Open pins 1 & 2 closed closed closed Pentium pins 1 & 2 pins 1 & 2 Closed pins 2 & 3 Overdrive closed closed closed CPU TYPE CONFIGURATION (CONTINUED) Type JC5 RC1 RC2 RC3 80486SX Open Not Installed Not Installed Not Installed Cx486S Open Not Installed Installed Not Installed Cx486DX Open Not Installed Installed Not Installed AM486DXL Open Not Installed Not Installed Installed 80486DX Open Not Installed Not Installed Not Installed 80486DX2 Open Not Installed Not Installed Not Installed 80486DX4 Closed Installed Not Installed Not Installed CPU TYPE CONFIGURATION (CONTINUED) Type J2 J10 JX3 JX4 JX5 Regular CPU pins 1 & pins 1 & N/A Open pins 1 & 2 2 2 SL-enhanced pins 2 & pins 2 & pins 1 & pins 1 & pins 2 & 3 3 2 2 3 Cyrix CPU N/A N/A pins 2 & pins 2 & N/A 3 3 Note:JX3 may not be available on some mainboards. Pins designated are in the closed position. CPU SPEED (VT8225N) CONFIGURATION Clock JK1 JK2 JK3 JK4 25 MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 33 MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed 40 MHz pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 50iMHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 50 MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed closed 66iMHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed DX4 INTERNAL CLOCK CONFIGURATION Speed JC6 » Internal 3 X Open Internal 2.5 X pins 1 & 2 closed Internal 2 X pins 2 & 3 closed IDE SPEED SELECT CONFIGURATION (PDC 20230 ONLY) IDE Type JD1 JD2 » Normal pins 2 & 3 closed pins 2 & 3 closed Fast pins 1 & 2 closed pins 1 & 2 closed Medium pins 2 & 3 closed pins 1 & 2 closed PRINTER PORT DIRECTION CONFIGURATION Direction JN7 JN8 » Output only pins 1 & 2 closed pins 2 & 3 closed Input only pins 1 & 2 closed pins 1 & 2 closed Bi-directional pins 2 & 3 closed Closed VRAM CONFIGURATION Size Bank 0 Bank 1 1MB (2) 512K x 4 NONE 2MB (2) 512K x 4 (2) 512K x 4