FIRST INTERNATIONAL COMPUTER, INC. LEO 486-GAV Processor 80486SL/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set VIA Max. Onboard 64MB DRAM Cache 64/128/256KB BIOS Award Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, (2), serial ports (2), VGA feature connector, VGA connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN2 VGA connector J5 (6-pin DIN) PS/2 mouse connector CN4 Turbo LED J20 Serial port 1 CN5 Turbo switch J21 Serial port 2 CN6 Reset switch J22 Parallel port CN8 Speaker J23 Floppy drive CN9 Power LED & keylock J24 interface IDE interface CN10 3.3V daughter board J32 (80486DX4 only) Video feature CN11 Green status LED J35 connector External battery J1 Hardware sleep J36 Green PC power J3 32-bit VESA Local bus S1 slot IDE interface LED J4 32-bit VESA Local bus S2 slot USER CONFIGURABLE SETTINGS Function Jumper Position » IDE connector pin 27 open J2 Open IDE connector pin 27 linked to J2 Closed IOCHRDY signal » IDE connector pin 28 open J6 Open IDE connector pin 28 linked to J6 Closed BALE signal » CMOS memory normal operation J7 pins 1 & 2 closed CMOS memory clear J7 pins 2 & 3 closed » Factory configured - do not alter J11 pins 1 & 2 closed » Factory configured - do not alter J25 N/A » 80486DX4 clock mode 2.5x J31 pins 1 & 2 closed 80486DX4 clock mode 2x J31 pins 2 & 3 closed 80486DX4 clock mode 3x J31 Open » Factory configured - do not alter J33 pins 2 & 3 closed » Pentium Overdrive write-back JC8 pins 1 & 2 closed Pentium Overdrive write-through JC8 pins 2 & 3 closed » Factory configured - do not alter JH pins 2 & 3 closed » Factory configured - do not alter JX6 pins 2 & 3 closed » Video upper physical address JV5 pins 1 & 2 decode input select SA (26..31) closed Video upper physical address JV5 pins 2 & 3 decode input select SAUP (1..2) closed » Video DAC local access enabled JV6 pins 1 & 2 closed Video DAC local access disabled JV6 pins 2 & 3 closed » Video memory address select 256KB JV11 pins 1 & 2 closed Video memory address select 64KB JV11 pins 2 & 3 closed » Normal operation JV12 pins 1 & 2 closed Other IDE/VGA controller is JV12 pins 2 & 3 installed at S1 closed » Normal operation JV13 pins 1 & 2 closed Other IDE/VGA controller is JV13 pins 2 & 3 installed at S2 closed » CPU clock 1x JX1 pins 1 & 2 closed CPU clock 2x JX1 pins 2 & 3 closed IDE CONFIGURATION IDE Speed J8 J9 J10 Enabled 0 pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed Enabled 1 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed Enabled 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed Disabled N/A N/A N/A pins 2 & 3 closed PARALLEL PORT CONFIGURATION Port JG JH Input pins 1 & 2 closed pins 1 & 2 closed Output pins 1 & 2 closed pins 2 & 3 closed Bi-directional pins 2 & 3 closed N/A VRAM CONFIGURATION Video IRQ9 JV3 JV4 » Enabled Disabled pins 2 & 3 pins 1 & 2 closed closed Disabled Enabled pins 1 & 2 pins 2 & 3 closed closed VRAM MEMORY CONFIGURATION Size Bank 0 Bank 1 1MB (2) 512K x 4 NONE 2MB (2) 512K x 4 (2) 512K x 4 VIDEO MCLK SELECT MCLK J18 J19 » 50MHz Open Open 52MHz Open Closed 45MHz Closed Closed 38MHz Closed Open MONITOR REFRESH RATE Rate JV7 JV8 » 43Hz interlaced pins 2 & 3 closed pins 2 & 3 closed 56Hz non-interlaced pins 2 & 3 closed pins 1 & 2 closed 60Hz non-interlaced pins 1 & 2 closed pins 2 & 3 closed 70/72Hz non-interlaced pins 1 & 2 closed pins 1 & 2 closed VIDEO INTERLEAVE TIMING Select JV9 JV10 » 1 NanoSeconds pins 1 & 2 closed pins 1 & 2 closed 2 NanoSeconds pins 1 & 2 closed pins 2 & 3 closed 3 NanoSeconds pins 2 & 3 closed pins 1 & 2 closed 4 NanoSeconds pins 2 & 3 closed pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 1MB NONE (1) 256K x NONE NONE 36 1MB NONE NONE (1) 256K x NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 2MB (1) 256K x NONE (1) 256K x NONE 36 36 2MB NONE NONE (1) 256K x (1) 256K x 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 3MB NONE (1) 256K x (1) 256K x (1) 256K x 36 36 36 3MB (1) 256K x NONE (1) 256K x (1) 256K x 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 4MB NONE (1) 1M x 36 NONE NONE 4MB NONE NONE (1) 1M x 36 NONE 5MB (1) 1M x 36 (1) 256K x NONE NONE 36 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 5MB (1) 256K x NONE (1) 1M x 36 NONE 36 5MB (1) 1M x 36 NONE (1) 256K x NONE 36 5MB NONE (1) 256K x (1) 4M x 36 NONE 36 5MB NONE (1) 4M x 36 (1) 256K x NONE 36 6MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 6MB NONE (1) 1M x 36 (1) 256K x (1) 256K x 36 36 6MB (1) 1M x 36 NONE (1) 256K x (1) 256K x 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 7MB (1) 256K x (1) 1M x 36 (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 1M x 36 NONE (1) 1M x 36 NONE 8MB NONE NONE (1) 1M x 36 (1) 1M x 36 8MB NONE (1) 1M x 36 NONE (1) 1M x 36 9MB (1) 256K x (1) 1M x 36 (1) 1M x 36 NONE 36 9MB (1) 1M x 36 (1) 256K x (1) 1M x 36 NONE 36 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 9MB NONE (1) 256K x (1) 1M x 36 (1) 1M x 36 36 9MB (1) 256K x NONE (1) 1M x 36 (1) 1M x 36 36 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 12MB NONE (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 DRAM CONFIGURATION (CONTINUED) Size Bank 0 Bank 1 Bank 2 Bank 3 12MB (1) 1M x 36 NONE (1) 1M x 36 (1) 1M x 36 13MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 36 13MB (1) 1M x 36 (1) 256K x (1) 1M x 36 (1) 1M x 36 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) 4M x 36 NONE NONE 16MB NONE NONE (1) 4M x 36 NONE 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 17MB (1) 256K x NONE (1) 4M x 36 NONE 36 17MB NONE (1) 4M x 36 (1) 256K x NONE 36 17MB NONE (1) 256K x (1) 4M x 36 NONE 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB (1) 256K x (1) 4M x 36 (1) 256K x NONE 36 36 18MB NONE (1) 4M x 36 (1) 256K x (1) 256K x 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 19MB (1) 256K x (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 20MB (1) 1M x 36 NONE (1) 4M x 36 NONE 20MB NONE (1) 1M x 36 (1) 4M x 36 NONE 20MB NONE (1) 4M x 36 (1) 1M x 36 NONE 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 21MB (1) 256K x (1) 1M x 36 (1) 4M x 36 NONE 36 21MB (1) 256K x (1) 4M x 36 (1) 1M x 36 NONE 36 21MB (1) 1M x 36 (1) 256K x (1) 4M x 36 NONE 36 21MB (1) 1M x 36 (1) 4M x 36 (1) 256K x NONE 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 22MB (1) 1M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 NONE 24MB NONE (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 25MB (1) 256K x (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 36 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 28MB (1) 1M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB NONE (1) 4M x 36 (1) 4M x 36 NONE 32MB NONE NONE (1) 4M x 36 (1) 4M x 36 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 DRAM CONFIGURATION (CONTINUED) Size Bank 0 Bank 1 Bank 2 Bank 3 33MB (1) 256K x (1) 4M x 36 (1) 4M x 36 NONE 36 33MB NONE (1) 256K x (1) 4M x 36 (1) 4M x 36 36 33MB (1) 256K x NONE (1) 4M x 36 (1) 4M x 36 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 34MB (1) 256K x (1) 256K x (1) 4M x 36 (1) 4M x 36 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE 36MB NONE (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 36MB (1) 1M x 36 NONE (1) 4M x 36 (1) 4M x 36 37MB (1) 256K x (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 36 37MB (1) 1M x 36 (1) 256K x (1) 4M x 36 (1) 4M x 36 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 48MB NONE (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 49MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 52MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 NONE (1) 8M x 36 NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB NONE (4) 32K x 8 (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 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 256KB pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed CPU SPEED CONFIGURATION Speed JK1 JK2 JK3 JK4 25MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 33MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed 40MHz 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 50MHz 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 CPU TYPE CONFIGURATION Type JC1 JC2 JC3 JC4 JC6 80486SX pins 2 pins 2 Open pins 1 Open & 3 & 3 & 2 CX486S pins 2 pins 2 Open pins 1 Closed & 3 & 3 & 2 CX486S+ pins 1 pins 1 Open pins 1 Open & 2 & 2 & 2 CX487S pins 1 pins 1 Open pins 1 Open & 2 & 2 & 2 AM486DXL pins 1 pins 1 Open pins 1 Closed & 2 & 2 & 2 CX486DX pins 1 pins 1 Open pins 1 Open & 2 & 2 & 2 80486DX pins 1 pins 1 Open pins 1 Closed & 2 & 2 & 2 80486DX2 pins 1 pins 1 Open pins 1 Closed & 2 & 2 & 2 80486DX4 pins 1 pins 1 Open pins 1 Closed & 2 & 2 & 2 Pentium pins 1 pins 1 Closed pins 2 Closed Overdrive & 2 & 2 & 3 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CONTINUED) Type JC5 RN40 RN41 RN46 80486SX Open Not Not Not installed installed installed CX486S Open Installed Not Not installed installed CX486S+ Open Installed Not Not installed installed CX487S Open Installed Not Not installed installed AM486DXL Open Not Not Installed installed installed CX486DX Open Installed Not Not installed installed 80486DX Open Not Not Not installed installed installed 80486DX2 Open Not Not Not installed installed installed 80486DX4 Closed Not Installed Not installed installed Pentium Closed Not Not Not installed Overdrive installed installed CPU TYPE CONFIGURATION (MANUFACTURER) Type J17 J34 Intel pins 1 & 2 closed pins 1 & 2 closed Cyrix pins 2 & 3 closed pins 2 & 3 closed CPU TYPE IRQ SELECTION Select J13 JX2 JX5 IRQ15 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed SMI pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed Note:Jumper pins 1 & 2 of J13 if JX2 and JX5 are set at SMI and you wish to use the IRQ15 function. KEYBOARD CONFIGURATION Select JX3 JX4 RN3 RN6 RN10 RN11 External pins pins Not Installed Not Installed 1 & 1 & installed installed 2 2 Internal pins pins Installed Not Installed Not 2 & 2 & installed installed 3 3 Note:Pins designated should be in the closed position. VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states JV1 JV2 < 33MHz 0 wait states pins 2 & 3 pins 2 & 3 closed closed > 33MHz 1 wait state pins 1 & 2 pins 1 & 2 closed closed PC87332 ECP DMA CHANNEL SELECT DREQ DACK JP1 JP2 1 1 pins 2 & 3 closed pins 2 & 3 closed 3 3 pins 1 & 2 closed pins 1 & 2 closed NSS87311/312 BASE I/O ADDRESS SELECT Index Address Data Address JF 26Eh 26Fh pins 1 & 2 closed 398h 399h pins 2 & 3 closed NSS87332 BASE I/O ADDRESS SELECT Index Address Data Address JF JG 2Eh 2Fh pins 1 & 2 pins 1 & 2 closed closed 26Eh 26Fh pins 1 & 2 pins 2 & 3 closed closed 15Ch 15Dh pins 2 & 3 pins 1 & 2 closed closed 398h 399h pins 2 & 3 pins 2 & 3 closed closed