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# DIGITAL EQUIPMENT CORPORATION
PC 5500
Device Type Mainboard
Processor Pentium II
Processor Speed 233/266/300/333/366/400MHz
Chip Set Intel
Video Chip Set ESS
Maximum Onboard 256MB (EDO supported)
Memory
Maximum Video 2MB
Memory
Cache 512KB (located on Pentium II CPU)
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options (CPU) Parallel port, PS/2 mouse port, serial
ports (2), VGA feature connector, VGA port,
USB connectors (2)
I/O Options 32-bit PCI slots (3), IDE interfaces (2),
(backplane) floppy drive interface, game/MIDI port,
parallel port, 100Base-T connector,
10Base-2 connector, audio in - CD-ROM,
fax/modem connector
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Serial port | CN1 | PS/2 mouse port | CN6 |
|-----------------+----------+--------------------+----------|
| Serial port | CN2 | Parallel port | CN7 |
|-----------------+----------+--------------------+----------|
| USB connector 1 | CN3 | VGA feature | CN8 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| USB connector 2 | CN4 | Video upgrade | CN9 |
| | | connectors | |
|-----------------+----------+--------------------+----------|
| VGA port | CN5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | Boot block update disabled | J27 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | Boot block update enabled | J27 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| » | Password disabled | SW1/5 | Off |
|---+------------------------------+-------+-----------------|
| | Password enabled | SW1/5 | On |
|---+------------------------------+-------+-----------------|
| » | BIOS normal operation | SW1/6 | Off |
|---+------------------------------+-------+-----------------|
| | BIOS recovery mode | SW1/6 | On |
|---+------------------------------+-------+-----------------|
| » | CMOS memory normal operation | SW1/7 | Off |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | SW1/7 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 4M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 1M x 36 | (2) 1M x | (2) 1M x | (2) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (2) 4M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 8M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 4M x 36 | (2) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 72MB | (2) 8M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 8M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 8M x 36 | (2) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 4M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 16M x | None | None | None |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 8M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 4M x 36 | (2) 4M x | (2) 4M x | (2) 4M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 136MB | (2) 16M x | (2) 1M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 144MB | (2) 16M x | (2) 2M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 152MB | (2) 16M x | (2) 1M x | (2) 1M x | (2) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (2) 16M x | (2) 4M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 176MB | (2) 16M x | (2) 2M x | (2) 2M x | (2) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (2) 16M x | (2) 8M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 192MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 224MB | (2) 16M x | (2) 4M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 32M x | None | None | None |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 16M x | (2) 16M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 512KB cache is located on the Pentium II CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: 1MB video memory is factory installed and is |
| not configurable. To increase to 2MB, install upgrade |
| module at CN9. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|SW1/1|SW1/2|SW1/3|SW1/4|SW1/8|
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x | On | Off | Off | On | On |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 266MHz | 66MHz | 4x | On | On | On | Off | On |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 300MHz | 66MHz | 4.5x | On | Off | On | Off | On |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 333MHz | 66MHz | 5x | On | On | Off | Off | On |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 366MHz | 66MHz | 5.5x | On | Off | Off | Off | On |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 400MHz | 66MHz | 6x | On | On | On | On | Off |
+------------------------------------------------------------+
(IMG) IMG 2
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Logic board | CN1 | Chassis fan | CN8 |
| connectors | | power | |
|---------------------+----------+----------------+----------|
| Power connector | CN2 | 5v power | CN9 |
| | | connector | |
|---------------------+----------+----------------+----------|
| IDE interface 1 | CN3 | Game/MIDI port | CN10 |
|---------------------+----------+----------------+----------|
| IDE interface 2 | CN4 | Audio in – | CN11 |
| | | CD-ROM | |
|---------------------+----------+----------------+----------|
| Floppy drive | CN5 | Audio | CN12 |
| interface | | connector | |
|---------------------+----------+----------------+----------|
| 100Base-T connector | CN6 | 32-bit PCI | PC1 – |
| | | slots | PC3 |
|---------------------+----------+----------------+----------|
| 10Base-T/10Base-2 | CN7 | | |
| connector | | | |
+------------------------------------------------------------+