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. |