FIRST INTERNATIONAL COMPUTER, INC.
486-GVT-2
Processor CX486S/80486SX/CX487S/CX486DX/80486DX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/50/66(internal)/66MHz
Speed
Chip Set VIA
Max. Onboard 96MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 259mm x 218mm
I/O Options 32-bit VESA local bus slots (2), PS/2 mouse port
[Image]
CONNECTIONS
Purpose Location Purpose Location
Turbo switch J1 Speaker J10
Green power supply J3 Power LED & keylock J11
External battery J4 PS/2 mouse port CN2
Turbo LED J8 Mouse connector CN4
Reset switch J9 32-bit VESA Local bus SL0 & SL1
slots
USER CONFIGURABLE SETTINGS
Function Jumper Position
» Monitor type select monochrome J2 Open
Monitor type select color J2 Closed
» CMOS memory normal operation J5 pins 2 & 3
(Internal Battery) closed
CMOS memory normal operation J5 pins 1 & 2
(External Battery) closed
» Transfer rate < 5.7MB/s J6 Open
Adaptec ISA master SCSI card J6 Closed
(transfer rate > 5.7MB/s)
» CMOS memory normal operation J7 Closed
CMOS memory clear J7 Open
» Cyrix CPU 1X clock mode J12 pins 2 & 3
closed
Cyrix CPU 2X clock mode J12 pins 1 & 2
closed
80486SX/P23S/P4S/CX486S disabled JC6 Closed
80486SX/P23S/P4S/CX486S enabled JC6 Open
» Factory configured - do not alter JP1 pins 1 & 2
closed
» IRQ 15 (regular CPU) JP2,JX2 pins 1 & 2
closed
SMI (Cyrix/Intel S series) JP2,JX2 pins 2 & 3
closed
» Local bus IDE interface disabled JP4 pins 1 & 2
closed
Local bus IDE interface enabled (SL0 JP4 pins 2 & 3
only) closed
» Factory configured - do not alter JP5 pins 1 & 2
closed
P24T write back JT1 pins 1 & 2
closed
P24T write through JT1 pins 2 & 3
closed
» Intel S-series CPU JCX1 Open
Cyrix CX486S/DX JCX1 Closed
» Intel S-series CPU JCX2 pins 1 & 2
closed
Cyrix CX486S/DX JCX2 pins 2 & 3
closed
» CPU clock 1X JX1 pins 1 & 2
closed
CPU clock 2X JX1 pins 2 & 3
closed
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2
1MB (4) 256K x 9 NONE NONE
1MB NONE (1) 256K x 36 NONE
1MB NONE NONE (1) 256K x 36
2MB (4) 256K x 9 (1) 256K x 36 NONE
2MB NONE (1) 256K x 36 (1) 256K x 36
2MB (4) 256K x 9 NONE (1) 256K x 36
3MB (4) 256K x 9 (1) 256K x 36 (1) 256K x 36
4MB (4) 1M x 9 NONE NONE
4MB NONE (1) 1M x 36 NONE
4MB NONE NONE (1) 1M x 36
5MB (4) 256K x 9 (1) 1M x 36 NONE
5MB (4) 256K x 9 NONE (1) 1M x 36
5MB (4) 1M x 9 (1) 256K x 36 NONE
5MB (4) 1M x 9 NONE (1) 256K x 36
5MB NONE (1) 256K x 36 (1) 1M x 36
DRAM CONFIGURATION (CONTINUED)
Size Bank 0 Bank 1 Bank 2
5MB NONE (1) 1M x 36 (1) 256K x 36
6MB (4) 256K x 9 (1) 1M x 36 (1) 256K x 36
6MB (4) 256K x 9 (1) 256K x 36 (1) 1M x 36
6MB (4) 1M x 9 (1) 256K x 36 (1) 256K x 36
8MB (4) 1M x 9 (1) 1M x 36 NONE
8MB (4) 1M x 9 NONE (1) 1M x 36
8MB NONE (1) 1M x 36 (1) 1M x 36
9MB (4) 256K x 9 (1) 1M x 36 (1) 1M x 36
9MB (4) 1M x 9 (1) 256K x 36 (1) 1M x 36
9MB (4) 1M x 9 (1) 1M x 36 (1) 256K x 36
12MB (4) 1M x 9 (1) 1M x 36 (1) 256K x 36
16MB (4) 4M x 9 NONE NONE
16MB NONE (1) 4M x 36 NONE
16MB NONE NONE (1) 4M x 36
17MB (4) 256K x 9 (1) 4M x 36 NONE
17MB (4) 256K x 9 NONE (1) 4M x 36
17MB NONE (1) 256K x 36 (1) 4M x 36
17MB NONE (1) 4M x 36 (1) 256K x 36
17MB (4) 4M x 9 (1) 256K x 36 NONE
17MB (4) 4M x 9 NONE (1) 256K x 36
18MB (4) 256K x 9 (1) 256K x 36 (1) 4M x 36
18MB (4) 256K x 9 (1) 4M x 36 (1) 256K x 36
18MB (4) 4M x 9 (1) 256K x 36 (1) 256K x 36
20MB (4) 1M x 9 (1) 4M x 36 NONE
20MB (4) 1M x 9 NONE (1) 4M x 36
20MB (4) 4M x 9 (1) 1M x 36 NONE
20MB (4) 4M x 9 NONE (1) 1M x 36
20MB NONE (1) 1M x 36 (1) 4M x 36
20MB NONE (1) 4M x 36 (1) 1M x 36
21MB (4) 256K x 9 (1) 1M x 36 (1) 4M x 36
21MB (4) 256K x 9 (1) 4M x 36 (1) 1M x 36
21MB (4) 1M x 9 (1) 256K x 36 (1) 4M x 36
21MB (4) 1M x 9 (1) 4M x 36 (1) 256K x 36
21MB (4) 4M x 9 (1) 256K x 36 (1) 1M x 36
21MB (4) 4M x 9 (1) 1M x 36 (1) 256K x 36
24MB (4) 1M x 9 (1) 1M x 36 (1) 4M x 36
24MB (4) 1M x 9 (1) 4M x 36 (1) 1M x 36
24MB (4) 4M x 9 (1) 1M x 36 (1) 1M x 36
32MB (4) 4M x 9 (1) 4M x 36 NONE
32MB (4) 4M x 9 NONE (1) 4M x 36
32MB NONE (1) 4M x 36 (1) 4M x 36
33MB (4) 256K x 9 (1) 4M x 36 (1) 4M x 36
33MB (4) 4M x 9 (1) 256K x 36 (1) 4M x 36
33MB (4) 4M x 9 (1) 4M x 36 (1) 256K x 36
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2
36MB (4) 4M x 9 (1) 4M x 36 (1) 256K x 36
36MB (4) 4M x 9 (1) 256K x 36 (1) 4M x 36
48MB (4) 4M x 9 (1) 4M x 36 (1) 4M x 36
64MB (4) 16M x 9 NONE NONE
65MB (4) 16M x 9 (1) 1M x 36 NONE
65MB (4) 16M x 9 NONE (1) 1M x 36
66MB (4) 16M x 9 (1) 1M x 36 (1) 1M x 36
68MB (4) 16M x 9 (1) 1M x 36 NONE
68MB (4) 16M x 9 NONE (1) 1M x 36
69MB (4) 16M x 9 (1) 1M x 36 (1) 1M x 36
69MB (4) 16M x 9 (1) 1M x 36 (1) 1M x 36
72MB (4) 16M x 9 (1) 1M x 36 (1) 1M x 36
80MB (4) 16M x 9 (1) 4M x 36 NONE
80MB (4) 16M x 9 NONE (1) 4M x 36
81MB (4) 16M x 9 (1) 1M x 36 (1) 1M x 36
81MB (4) 16M x 9 (1) 1M x 36 (1) 4M x 36
81MB (4) 16M x 9 (1) 4M x 36 (1) 1M x 36
84MB (4) 16M x 9 (1) 1M x 36 (1) 4M x 36
84MB (4) 16M x 9 (1) 4M x 36 (1) 1M x 36
96MB (4) 16M x 9 (1) 4M x 36 (1) 4M x 36
CACHE CONFIGURATION
Size Bank 0 Bank 1 TAG
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 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 TYPE CONFIGURATION
CPU type RN13 RN14 RN16
CX486S & 487S/DX Not installed Not installed Installed
SX/DX/DX2 Not installed Not installed Not installed
P23S/P4S/P24S Installed Not installed Not installed
P23S/P4S/CX486S Not installed Installed Not installed
CPU TYPE CONFIGURATION
CPU type JC1 JC2 JC3 JC4 JC5 JC7
CX486S 2 & 3 2 & 3 Closed Open Open 1 & 2
CX486S/487S 1 & 2 1 & 2 Closed Open Open 1 & 2
486SX/P23S 2 & 3 2 & 3 Open Open Closed 1 & 2
CX486DX 1 & 2 1 & 2 Closed Open Open 1 & 2
DX/DX2 1 & 2 1 & 2 Closed Open Closed 1 & 2
P24S/P4S 1 & 2 1 & 2 Closed Open Closed 1 & 2
P24T 1 & 2 1 & 2 Open Closed Open 2 & 3
Note: pins designated should be in the closed position.
CPU CLOCK SELECT
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
50MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 2 & 3
closed closed closed closed
66MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 2 & 3
closed closed closed closed
80MHz pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 2 & 3
closed closed closed closed
100MHz pins 1 & 2 pins 2 & 3 pins 1 & 2 pins 2 & 3
closed closed closed closed
VESA WAIT STATE/BUS SPEED CONFIGURATION
CPU speed Wait states JV2 JV3
< 33MHz 0 wait states pins 1 & 2 pins 1 & 2
closed closed
> 33MHz 1 wait state pins 2 & 3 pins 2 & 3
closed closed