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# FIRST INTERNATIONAL COMPUTER, INC.
486-POS
Device Mainboard
Type
Processor 80486SX/U5S/U5SD/U5SLV/CX 486DX/80486DX/CX 486DX2/
AM486DX2/80486DX2/CX 486DX4/TI486DX4/AM486DX4/80486DX4/
P24D/P24S/P24T/CX 5X85/CX M1SC/AM X5
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed
100(internal)/120(internal)/133(internal)MHz
Chip Set VIA
Video Chip Unidentified
Set
Maximum 64MB
Onboard
Memory
Maximum 1MB
Video
Memory
Cache None
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Ethernet BNC connector, Ethernet RJ-45 connector, floppy drive
Options interface, IDE interface, parallel port, PS/2 mouse port, serial
port, VGA interface
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Power LED & keylock | C1 | VGA interface | CN5 |
|----------------------+----------+---------------+----------|
| Reset switch | C2 | IDE interface | CN6 |
|----------------------+----------+---------------+----------|
| Ethernet BNC | CN1 | Floppy drive | CN7 |
| connector | | interface | |
|----------------------+----------+---------------+----------|
| Ethernet RJ-45 | CN2 | Parallel port | CN8 |
| connector | | | |
|----------------------+----------+---------------+----------|
| PS/2 mouse port | CN3 | Keyboard | CN9 |
| | | connector | |
|----------------------+----------+---------------+----------|
| Serial port 1 | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | CMOS memory normal operation | CMOS | Closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | CMOS | Open |
|---+---------------------------------+-------+--------------|
| » | On board LAN enabled | JL1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board LAN disabled | JL1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board chipset select CG | JP1 | Pins 2 & 3 |
| | version | | closed |
|---+---------------------------------+-------+--------------|
| | On board chipset select all | JP1 | Pins 1 & 2 |
| | others | | closed |
|---+---------------------------------+-------+--------------|
| » | On board video enabled | JV1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board video disabled | JV1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JV2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Monitor type select | VID | Open |
| | monochrome/EGA/VGA | | |
|---+---------------------------------+-------+--------------|
| | Monitor type select color | VID | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (1) 256K x 16 | None |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 16 | (1) 256K x 16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 |
|---------------+-----------------+-----------------+--------|
| 80486SX | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| U5S | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| U5SD | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| U5SLV | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| CX 486DX | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| 80486DX | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| CX 486DX2 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| AM486DX2-80 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| AM486DX2 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| 80486DX2 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| CX 486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| TI486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| AM486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| (SL) AM486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| 80486DX4 (3x) | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| 80486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| P24D | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| P24S | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| P24T | Pins 1 & 2 | Pins 1 & 2 | Closed |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| CX 5X85 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| CX M1SC | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
|---------------+-----------------+-----------------+--------|
| AM X5 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON'T) |
|------------------------------------------------------------|
| Type | RNA | RNC | RN1 |
|---------------+------------+------------+------------------|
| 80486SX | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| U5S | Pins 1 - 8 | Not | Not installed |
| | closed | installed | |
|---------------+------------+------------+------------------|
| U5SD | Pins 1 - 8 | Not | Not installed |
| | closed | installed | |
|---------------+------------+------------+------------------|
| U5SLV | Pins 1 - 8 | Not | Not installed |
| | closed | installed | |
|---------------+------------+------------+------------------|
| CX 486DX | Not | Pins 1 - 8 | Not installed |
| | installed | closed | |
|---------------+------------+------------+------------------|
| 80486DX | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| CX 486DX2 | Not | Pins 1 - 8 | Not installed |
| | installed | closed | |
|---------------+------------+------------+------------------|
| AM486DX2-80 | Not | * | * |
| | installed | | |
|---------------+------------+------------+------------------|
| AM486DX2 | Installed | Not | Not installed |
| | | installed | |
|---------------+------------+------------+------------------|
| 80486DX2 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| CX 486DX4 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| TI486DX4 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| AM486DX4 | Installed | Not | Not installed |
| | | installed | |
|---------------+------------+------------+------------------|
| (SL) AM486DX4 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| 80486DX4 (3x) | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| 80486DX4 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| P24D | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| P24S | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| P24T | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| CX 5X85 | Not | Not | Pins 1 - 8 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| CX M1SC | Not | Not | Pins 2 - 10 |
| | installed | installed | closed |
|---------------+------------+------------+------------------|
| AM X5 | Not | * | * |
| | installed | | |
|------------------------------------------------------------|
| Note: * = Connect pin 2 on RN1 to pin 5 on RNC |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JK1 | JK2 | JK3 | JK4 |
|---------+-------------+------------+------------+----------|
| 25MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 33MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 40MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 50iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 50MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+-------------+------------+------------+----------|
| 66iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 75iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 80iMHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 100iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 120iMHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+-------------+------------+------------+----------|
| 133iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU LOW VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JVC1 | JVC2 |
|------------------+--------------------+--------------------|
| 3.3v | Pins 1 & 2 closed | Open |
|------------------+--------------------+--------------------|
| 3.45v | Pins 2 & 3 closed | Open |
|------------------+--------------------+--------------------|
| 3.59v | Open | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 4v | Open | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | CN3V |
|----------------------------+-------------------------------|
| 3.3v | Open |
|----------------------------+-------------------------------|
| 3.46v | Open |
|----------------------------+-------------------------------|
| 3.59v | Open |
|----------------------------+-------------------------------|
| 4v | Open |
|----------------------------+-------------------------------|
| 5v | Pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | ECP1 | ECP2 |
|------------------+--------------------+--------------------|
| » 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+