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# FIRST INTERNATIONAL COMPUTER, INC.
486VC-H (REV. A1)
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set VT
Max. Onboard 128MB
DRAM
SRAM Cache 64/128/256KB
BIOS Award
Dimensions 289.8mm x 218.4mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo LED | J6 | Speaker | J9 |
|----------------+----------+---------------------+----------|
| Turbo switch | J7 | Power LED & keylock | J10 |
|----------------+----------+---------------------+----------|
| Reset switch | J8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+-----------+------------|
| » | CMOS memory normal operation | J1 | open |
|---+-------------------------------+-----------+------------|
| | CMOS memory clear | J1 | closed |
|---+-------------------------------+-----------+------------|
| » | Monitor type select | J2 | open |
| | monochrome | | |
|---+-------------------------------+-----------+------------|
| | Monitor type select color | J2 | closed |
|---+-------------------------------+-----------+------------|
| » | CPU speed select OSC1/1 | JK1 & JK2 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | CPU speed select OSC1/2 | JK1 & JK2 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 65MB | (4) 16M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 68MB | (4) 16M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 80MB | (4) 16M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location | TAG/Dirty | JS1 | JS2 |
| | SRAM | | Bit | | |
|-------+----------+----------+------------+--------+--------|
| 64KB | (8) 8K x | Banks 0 | (2) 8K x 8 | pins 1 | pins 1 |
| | 8 | & 1 | | & 2 | & 2 |
|-------+----------+----------+------------+--------+--------|
| 128KB | (4) 32K | Bank 0 | (2) 8K x 8 | pins 1 | pins 2 |
| | x 8 | | | & 2 | & 3 |
|-------+----------+----------+------------+--------+--------|
| 256KB | (8) 32K | Banks 0 | (2) 32K x | pins 2 | pins 2 |
| | x 8 | & 1 | 8 | & 3 | & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU Type | JC1 | JC2 | JC3 |
|----------+----------------+----------------+---------------|
| 80486DX2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80487SX | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80486SX | pins 2 & 3 | pins 2 & 3 | open |
| | closed | closed | |
+------------------------------------------------------------+