FIRST INTERNATIONAL COMPUTER, INC.
486-GT
Processor |
CX486S/CX487S/80486SL/80486SX/CX486DX/80486DX/ODP486SX/ 80486DX2/Pentium Overdrive |
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
Chip Set |
VIA |
Max. Onboard DRAM |
96MB |
Cache |
64/128/256KB |
BIOS |
Award |
Dimensions |
330mm x 218mm |
I/O Options |
None |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
External battery |
J1 |
Reset switch |
J8 |
Turbo switch |
J2 |
Speaker |
J9 |
Green Power supply connector |
J3 |
Power LED & keylock |
J10 |
Turbo LED |
J6 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
|
Monitor type select monochrome, EGA or VGA |
J4 |
Open |
Monitor type select color |
J4 |
Closed | |
|
Adaptec ISA master installed |
J5 |
Closed |
Adaptec ISA master not installed |
J5 |
Open | |
|
CMOS memory normal operation |
J7 |
Open |
CMOS memory clear |
J7 |
Closed | |
|
Cyrix clock 2 x mode |
JC8 |
pins 1 & 2 closed |
Cyrix clock 1 x mode |
JC8 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
JP1 |
pins 1 & 2 closed |
|
Factory configured - do not alter |
JP3 |
pins 1 & 2 closed |
|
Pentium Overdrive write-back CPU installed |
JT1 |
pins 1 & 2 closed |
Pentium Overdrive write-through CPU installed |
JT1 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
JX1 |
pins 1 & 2 closed |
DRAM CONFIGURATION | |||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
1MB |
(4) 256K x 9 |
NONE |
NONE |
1MB |
NONE |
(1) 1M x 36 |
NONE |
1MB |
NONE |
NONE |
(1) 1M x 36 |
2MB |
(4) 256K x 9 |
(1) 1M x 36 |
NONE |
2MB |
NONE |
(1) 1M x 36 |
(1) 1M x 36 |
2MB |
(4) 256K x 9 |
NONE |
(1) 1M x 36 |
3MB |
(4) 256K x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
4MB |
(4) 1M x 9 |
NONE |
NONE |
4MB |
NONE |
(1) 4M x 36 |
NONE |
4MB |
NONE |
NONE |
(1) 4M x 36 |
5MB |
(4) 256K x 9 |
(1) 4M x 36 |
NONE |
5MB |
(4) 256K x 9 |
NONE |
(1) 4M x 36 |
5MB |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
5MB |
(1) 1M x 9 |
NONE |
(1) 1M x 36 |
5MB |
NONE |
(1) 1M x 36 |
(1) 4M x 36 |
5MB |
NONE |
(1) 4M x 36 |
(1) 1M x 36 |
6MB |
(4) 256K x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
6MB |
(4) 256K x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
6MB |
(1) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
8MB |
(1) 1M x 9 |
(1) 4M x 36 |
NONE |
8MB |
(1) 1M x 9 |
NONE |
(1) 4M x 36 |
8MB |
NONE |
(1) 4M x 36 |
(1) 4M x 36 |
9MB |
(4) 256K x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
9MB |
(1) 1M x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
9MB |
(1) 1M x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
12MB |
(1) 1M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
16MB |
(1) 4M x 9 |
NONE |
NONE |
16MB |
NONE |
(1) 16M x 36 |
NONE |
16MB |
NONE |
NONE |
(1) 16M x 36 |
DRAM CONFIGURATION (CONT.) | |||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
17MB |
(4) 256K x 9 |
(1) 16M x 36 |
NONE |
17MB |
(4) 256K x 9 |
NONE |
(1) 16M x 36 |
17MB |
NONE |
(1) 1M x 36 |
(1) 16M x 36 |
17MB |
NONE |
(1) 16M x 36 |
(1) 1M x 36 |
17MB |
(1) 4M x 9 |
(1) 1M x 36 |
NONE |
17MB |
(1) 4M x 9 |
NONE |
(1) 1M x 36 |
18MB |
(4) 256K x 9 |
(1) 1M x 36 |
(1) 16M x 36 |
18MB |
(4) 256K x 9 |
(1) 16M x 36 |
(1) 1M x 36 |
18MB |
(1) 4M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
20MB |
(1) 1M x 9 |
(1) 16M x 36 |
NONE |
20MB |
(1) 1M x 9 |
NONE |
(1) 16M x 36 |
20MB |
(1) 4M x 9 |
(1) 4M x 36 |
NONE |
20MB |
(1) 4M x 9 |
NONE |
(1) 4M x 36 |
20MB |
NONE |
(1) 4M x 36 |
(1) 16M x 36 |
20MB |
NONE |
(1) 16M x 36 |
(1) 4M x 36 |
21MB |
(4) 256K x 9 |
(1) 4M x 36 |
(1) 16M x 36 |
21MB |
(4) 256K x 9 |
(1) 16M x 36 |
(1) 4M x 36 |
21MB |
(1) 1M x 9 |
(1) 1M x 36 |
(1) 16M x 36 |
21MB |
(1) 1M x 9 |
(1) 16M x 36 |
(1) 1M x 36 |
21MB |
(1) 4M x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
21MB |
(1) 4M x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
24MB |
(1) 1M x 9 |
(1) 4M x 36 |
(1) 16M x 36 |
24MB |
(1) 1M x 9 |
(1) 16M x 36 |
(1) 4M x 36 |
24MB |
(1) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
32MB |
(1) 4M x 9 |
(1) 16M x 36 |
NONE |
32MB |
(1) 4M x 9 |
NONE |
(1) 16M x 36 |
32MB |
NONE |
(1) 16M x 36 |
(1) 16M x 36 |
32MB |
NONE |
(1) 32M x 36 |
NONE |
32MB |
NONE |
NONE |
(1) 32M x 36 |
33MB |
(4) 256K x 9 |
(1) 16M x 36 |
(1) 16M x 36 |
33MB |
(1) 4M x 9 |
(1) 1M x 36 |
(1) 16M x 36 |
33MB |
(1) 4M x 9 |
(1) 16M x 36 |
(1) 1M x 36 |
36MB |
(1) 1M x 9 |
(1) 16M x 36 |
(1) 16M x 36 |
36MB |
(1) 4M x 9 |
(1) 4M x 36 |
(1) 16M x 36 |
36MB |
(1) 4M x 9 |
(1) 16M x 36 |
(1) 4M x 36 |
48MB |
(1) 4M x 9 |
(1) 16M x 36 |
(1) 16M x 36 |
64MB |
(1) 16M x 9 |
NONE |
NONE |
64MB |
NONE |
(1) 32M x 36 |
(1) 32M x 36 |
65MB |
(1) 16M x 9 |
(1) 1M x 36 |
NONE |
65MB |
(1) 16M x 9 |
NONE |
(1) 1M x 36 |
66MB |
(1) 16M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
68MB |
(1) 16M x 9 |
(1) 4M x 36 |
NONE |
68MB |
(1) 16M x 9 |
NONE |
(1) 4M x 36 |
69MB |
(1) 16M x 9 |
(1) 1M x 36 |
(1) 4M x 36 |
69MB |
(1) 16M x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
DRAM CONFIGURATION (CONT.) | |||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
72MB |
(1) 16M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
80MB |
(1) 16M x 9 |
(1) 16M x 36 |
NONE |
80MB |
(1) 16M x 9 |
NONE |
(1) 16M x 36 |
81MB |
(1) 16M x 9 |
(1) 1M x 36 |
(1) 16M x 36 |
81MB |
(1) 16M x 9 |
(1) 16M x 36 |
(1) 1M x 36 |
84MB |
(1) 16M x 9 |
(1) 4M x 36 |
(1) 16M x 36 |
84MB |
(1) 16M x 9 |
(1) 16M x 36 |
(1) 4M x 36 |
96MB |
(1) 16M x 9 |
(1) 16M x 36 |
(1) 16M 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 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
128KB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
256KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
CPU TYPE CONFIGURATION | |||||||
Type |
JC1 |
JC2 |
JC3 |
JC4 |
JC5 |
JC7 |
JCX1 |
CX486S |
2 & 3 |
2 & 3 |
Closed |
Open |
Open |
1 & 2 |
Open |
CX486S/CX487S |
1 & 2 |
1 & 2 |
Closed |
Open |
Open |
1 & 2 |
Closed |
CX487S |
1 & 2 |
1 & 2 |
Closed |
Open |
Open |
1 & 2 |
Closed |
80486SL |
1 & 2 |
1 & 2 |
Closed |
Open |
Closed |
1 & 2 |
Open |
80486SX |
2 & 3 |
2 & 3 |
Open |
Open |
Closed |
1 & 2 |
Open |
CX486DX |
1 & 2 |
1 & 2 |
Closed |
Open |
Open |
1 & 2 |
Closed |
80486DX |
1 & 2 |
1 & 2 |
Closed |
Open |
Closed |
1 & 2 |
Open |
ODP486SX |
1 & 2 |
1 & 2 |
Closed |
Open |
Closed |
1 & 2 |
Open |
80486DX2 |
1 & 2 |
1 & 2 |
Closed |
Open |
Closed |
1 & 2 |
Open |
Pentium Overdrive |
1 & 2 |
1 & 2 |
Open |
Closed |
Open |
2 & 3 |
Open |
Note:Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION (CONT.) | |||||
Type |
JCX2 |
JP2 |
JX2 |
RN12 |
RN13 |
CX486S |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
Not installed |
Installed |
80486SL |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
Installed |
Not installed |
80486SX |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
Not installed |
Not installed |
CX486DX |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
Not installed |
Installed |
80486DX |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
Not installed |
Not installed |
ODP486SX |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
Installed |
Not installed |
80486DX2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
Not installed |
Not installed |
Pentium Overdrive |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
Installed |
Not installed |
Note:Pins designated should be in the closed position. |
CPU SPEED CONFIGURATION | ||||
Speed |
JK1 |
JK2 |
JK3 |
JK4 |
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
33MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
40MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
50MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
66iMHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
KEYBOARD CONTROL SELECT | |||
Keyboard |
JX3 |
RN1 |
RN2 |
Internal |
pins 2 & 3 closed |
Not installed |
Installed |
External |
pins 1 & 2 closed |
Installed |
Not installed |
MISCELLANEOUS TECHNICAL NOTES |
When U15 is installed JP5 and JP6 should be set to pins 2 & 3 closed. When U15 is not installed, JP5 and JP6 should be set to pins 1 & 2 closed. The exact location for U15 is unknown. The exact function of X2 is unknown. |