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# 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. 64MB
Onboard
DRAM
Cache 64/128/256KB
BIOS Award
Dimensions 330mm x 218mm
I/O 3.3V Daughter board connector, 32-bit VESA local
Options bus slot,
floppy drive interface,IDE interface, parallel
port, PS/2 mouse port,
serial ports (2), VGA feature connector, VGA port
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 keyboard | CN1 | Green power | J3 |
| connector | | supply connector | |
|-------------------+----------+------------------+----------|
| PS/2 mouse | CN2 | IDE interface | J6 |
| connector | | LED | |
|-------------------+----------+------------------+----------|
| 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 & | J15 |
| connector (8514A) | | keylock | |
|-------------------+----------+------------------+----------|
| Floppy drive | CN9 | ISA Bus slot | SL1 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface | CN10 | 32-bit VESA | SL2 |
| | | Local bus slot | |
|-------------------+----------+------------------+----------|
| 3.3V Daughter | CN11 | | |
| board 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 | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | NONE | (1) 1M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | NONE | NONE | (1) 1M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | (1) 1M x 36 | (1) 2M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | (1) 2M x | (1) 2M x |
| | | | 36 | 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 | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 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 | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | NONE | (1) 4M x 36 | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | NONE | NONE | (1) 4M x | (1) 8M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 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 closed | pins 1 & 2 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 |
| | | | 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 | Not | Not |
| | | Installed | Installed | Installed |
|----------+--------+--------------+------------+------------|
| Cx486S | Open | Not | Installed | Not |
| | | Installed | | Installed |
|----------+--------+--------------+------------+------------|
| Cx486DX | Open | Not | Installed | Not |
| | | Installed | | Installed |
|----------+--------+--------------+------------+------------|
| AM486DXL | Open | Not | Not | Installed |
| | | Installed | Installed | |
|----------+--------+--------------+------------+------------|
| 80486DX | Open | Not | Not | Not |
| | | Installed | Installed | Installed |
|----------+--------+--------------+------------+------------|
| 80486DX2 | Open | Not | Not | Not |
| | | Installed | Installed | Installed |
|----------+--------+--------------+------------+------------|
| 80486DX4 | Closed | Installed | Not | Not |
| | | | Installed | 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 |
+------------------------------------------------------------+