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# PACKARD BELL
PB400 (4MB)
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor 16/20/25/33/50(internal)/66(internal)MHz
Speed
Chip Set OPTI
Max. onboard 20MB
DRAM
SRAM Cache 64/128/256KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options Fax/modem daughterboard, floppy drive interface,
game port, IDE interface, multi-function
connector (IDE interface LED, keylock, reset,
SW_MODLR, Turbo LED), parallel port, PS/2
keyboard port, PS/2 mouse port, serial port, VGA
feature connector, VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| PS/2 keyboard | J1 | Keylock | J19 |
|---------------+----------+----------------------+----------|
| PS/2 mouse | J2 | Fax/modem | J21 |
| | | daughterboard | |
|---------------+----------+----------------------+----------|
| VGA port | J3 | IDE interface | J25 |
|---------------+----------+----------------------+----------|
| Game port | J4 | Floppy drive | J27 |
| | | interface | |
|---------------+----------+----------------------+----------|
| Parallel port | J5 | External speaker | J28 |
| | | connector | |
|---------------+----------+----------------------+----------|
| Serial port B | J6 | Multi-function | J32 |
| | | connector | |
|---------------+----------+----------------------+----------|
| External | J7 | CPU/chassis fan | J33 |
| battery | | power (+12VDC) | |
|---------------+----------+----------------------+----------|
| VGA feature | J13 | Riser card | S1 |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Internal battery enabled | J8 | Closed |
|---+----------------------------------+--------+------------|
| | Internal battery disabled | J8 | Open |
|---+----------------------------------+--------+------------|
| » | Onboard Game port enabled | J12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Onboard Game port disabled | J12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J16 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J16 | Open |
|---+----------------------------------+--------+------------|
| » | PS/2 mouse port enabled | J17 | Closed |
|---+----------------------------------+--------+------------|
| | PS/2 mouse port disabled | J17 | Open |
|---+----------------------------------+--------+------------|
| » | Onboard IDE interface enabled | J24 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Onboard IDE interface disabled | J24 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Onboard floppy drive interface | J26 | pins 1 & 2 |
| | enabled | | closed |
|---+----------------------------------+--------+------------|
| | Onboard floppy drive interface | J26 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| » | Onboard speaker enabled | J29 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Onboard speaker disabled | J29 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Parity 0 | Bank 1 | Parity 1 | Bank 2 |
|-------+---------+-----------+---------+-----------+--------|
| 4MB | (2) | (1) | (2) | (1) | None |
| | 441000 | 411000 | 441000 | 411000 | |
|-------+---------+-----------+---------+-----------+--------|
| 5MB | (2) | (1) | (2) | (1) | (4) |
| | 441000 | 411000 | 441000 | 411000 | 256K x |
| | | | | | 9 |
|-------+---------+-----------+---------+-----------+--------|
| 8MB | (2) | (1) | (2) | (1) | (4) 1M |
| | 441000 | 411000 | 441000 | 411000 | x 9 |
|-------+---------+-----------+---------+-----------+--------|
| 20MB | (2) | (1) | (2) | (1) | (4) 4M |
| | 441000 | 411000 | 441000 | 411000 | x 9 |
|------------------------------------------------------------|
| Note:Bank 0 and 1 are soldered to the board. Locations of |
| Parity 0 and 1 are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Mode | J10 | J14 |
|-----------------------------+--------------------+---------|
| VGA port (J3) | pins 1 & 2 closed | Closed |
|-----------------------------+--------------------+---------|
| VGA feature connector (J13) | pins 1 & 2 closed | Open |
|-----------------------------+--------------------+---------|
| Disabled | pins 2 & 3 closed | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------------+---------------------+--------------------|
| 512KB | (4) 44256 | None |
|-----------------+---------------------+--------------------|
| 1024KB | (4) 44256 | (4) 44256 |
|------------------------------------------------------------|
| Note: If Bank 1 sockets are omitted from board, board was |
| factory installed with 1MB of VRAM. Bank 0 is soldered to |
| the board. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Modem (J21) | Port B | ISA | J18 | J20 | J101/JMOD |
| | (J5) | Modem | | | * |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM2 | None | N/A | pins 1 | Closed |
| | | | | & 2 | |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM2 | COM1 | pins 2 | pins 1 | Closed |
| | | | & 3 | & 2 | |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM2 | COM3 | pins 1 | pins 1 | Closed |
| | | | & 2 | & 2 | |
|-------------+--------+-------+--------+--------+-----------|
| COM1 | COM2 | None | pins 1 | pins 1 | Open |
| | | | & 2 | & 2 | |
|-------------+--------+-------+--------+--------+-----------|
| COM3 | COM2 | None | pins 2 | pins 1 | Open |
| | | | & 3 | & 2 | |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM4 | None | N/A | pins 2 | Closed |
| | | | | & 3 | |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM4 | COM1 | pins 2 | pins 2 | Closed |
| | | | & 3 | & 3 | |
|-------------+--------+-------+--------+--------+-----------|
| Disabled | COM4 | COM3 | pins 1 | pins 2 | Closed |
| | | | & 2 | & 3 | |
|-------------+--------+-------+--------+--------+-----------|
| COM1 | COM4 | None | pins 1 | pins 2 | Open |
| | | | & 2 | & 3 | |
|-------------+--------+-------+--------+--------+-----------|
| COM3 | COM4 | None | pins 2 | pins 2 | Open |
| | | | & 3 | & 3 | |
|------------------------------------------------------------|
| Note:* JMOD is a special block placed on J21 itself, |
| connecting pins 10 and 11 together diagonally. Permanent |
| damage to the board will occur if the JMOD jumper is |
| installed improperly. |
| |
| Boards with J101 do not use the JMOD jumper (J101 is a |
| direct replacement for JMOD). |
| |
| Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT | IRQ | J22 | J23 |
|------------+-------+-------------------+-------------------|
| » | LPT1 | IRQ7 | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------+-------+-------------------+-------------------|
| | LPT1 | IRQ5 | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------+-------+-------------------+-------------------|
| | LPT2 | IRQ7 | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------+-------+-------------------+-------------------|
| | LPT2 | IRQ5 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU |J30/1 &|J30/3 |J30/5 |J30/7 |J30/9&10| J31 | J34 |
| | 2 | & 4 | & 6 | & 8 | | | |
|--------+-------+------+------+------+--------+------+------|
|80486SX | Open |Closed| Open | Open | Open | Open | Open |
|--------+-------+------+------+------+--------+------+------|
|80487SX |Closed | Open |Closed| Open | Closed | Open | Open |
|--------+-------+------+------+------+--------+------+------|
|80486DX |Closed | Open |Closed|Closed| Open | Open | Open |
|--------+-------+------+------+------+--------+------+------|
|ODP486SX|Closed | Open |Closed|Closed| Open |Closed|Closed|
|--------+-------+------+------+------+--------+------+------|
|80486DX2|Closed | Open |Closed|Closed| Open | Open |Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J35/pins 1 & 2 | J35/pins 3 & 4 |
|------------------+--------------------+--------------------|
| 16MHz | Closed | Closed |
|------------------+--------------------+--------------------|
| 20MHz | Open | Closed |
|------------------+--------------------+--------------------|
| 25MHz | Closed | Open |
|------------------+--------------------+--------------------|
| 33MHz | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U81) | Dirty Bit |
| | | | | (U84) |
|-------+-------------+------------+-----------+-------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 32K x | (1) 64K x 1 |
| | | | 8 | |
|-------+-------------+------------+-----------+-------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x | (1) 64K x 1 |
| | | | 8 | |
|-------+-------------+------------+-----------+-------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 64K x 1 |
| | | 8 | 8 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J36/1 & | J36/3 | J36/5 | J36/7 | J36/9 |
| | 2 | & 4 | & 6 | & 8 | & 10 |
|--------------+---------+--------+--------+--------+--------|
| » | Disabled | Open | Open | Open | Open | Open |
|---+----------+---------+--------+--------+--------+--------|
| | 64KB | Open | Open | Open | Open | Open |
|---+----------+---------+--------+--------+--------+--------|
| | 128KB | Closed | Open | Closed | Closed | Open |
|---+----------+---------+--------+--------+--------+--------|
| | 256KB | Closed | Closed | Closed | Open | Closed |
+------------------------------------------------------------+