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# PACKARD BELL
PB55 SERIES/F820 SERIES SX
(LEGEND 520SX)
Processor 80386SX
Processor Speed 20MHz
Chip Set TI
Max. Onboard 16MB
DRAM
Cache 16/32KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options Parallel port, serial ports (2), ps/2 mouse
port, vga interface, floppy drive interface,
IDE interface
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+------------+---------------+------------|
| Keyboard | J1 | Speaker | JP16 |
|------------------+------------+---------------+------------|
| PS/2 mouse port | J2 | Reset switch | JP50 pin 1 |
|------------------+------------+---------------+------------|
| Serial port 2 | J3 | Turbo switch | JP50 pin 2 |
|------------------+------------+---------------+------------|
| Serial port 1 | J4 | Power ready | JP50 pin 3 |
|------------------+------------+---------------+------------|
| Parallel port | J5 | IDE LED | JP50 pin 4 |
|------------------+------------+---------------+------------|
| VGA interface | J6 | Turbo LED | JP50 pin 5 |
|------------------+------------+---------------+------------|
| Floppy interface | J10 | Ground | JP50 pin 6 |
|------------------+------------+---------------+------------|
| IDE interface | J11 | Keylock | JP51 |
|------------------+------------+---------------+------------|
| External battery | JP1 | Riser card | S1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP3 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP3 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP4 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | PS/2 mouse enabled | JP5 | Closed |
|---+----------------------------------+--------+------------|
| | PS/2 mouse disabled | JP5 | Open |
|---+----------------------------------+--------+------------|
| » | 800 x 600 display frequency | JP7 | Closed |
| | select 60Hz V/37.8KHz H | | |
|---+----------------------------------+--------+------------|
| | 800 x 600 display frequency | JP7 | Open |
| | select 56Hz V/35.2KHz H | | |
|---+----------------------------------+--------+------------|
| » | Monitor timing select multi-sync | JP8 | Closed |
| | one | | |
|---+----------------------------------+--------+------------|
| | Monitor timing select PS/2 and | JP8 | Open |
| | others | | |
|---+----------------------------------+--------+------------|
| » | Video BIOS select PS/2 VGA mode | JP9 | Closed |
|---+----------------------------------+--------+------------|
| | Video BIOS select AT VGA mode | JP9 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP10 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP11 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | VGA interface enabled | JP12 | Closed |
|---+----------------------------------+--------+------------|
| | VGA interface disabled | JP12 | Open |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP14 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP14 | Closed |
|---+----------------------------------+--------+------------|
| » | Speaker select internal | JP15 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Speaker select external | JP15 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP18 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Printer port type select | JP30 | Closed |
| | Centronics | | |
|---+----------------------------------+--------+------------|
| | Printer port type select PS/2 | JP30 | Open |
| | (bi-directional) | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 2.5MB | (2) 256K x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8.5MB | (2) 256K x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 16KB | (2) 8K x 8 | NONE |
|----------------+---------------------+---------------------|
| 32KB | (2) 8K x 8 | (2) 8K x 8 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
+------------------------------------------------------------+