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# SIEMENS NIXDORF INFORMATIONSSYSTEME AG
SYSTEM BOARD PCD-4LDX
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 32MB
Memory
Maximum Video 2MB
Memory
Cache 64/128/256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Ethernet 10Base5 connector, Ethernet 10BaseT
connector, floppy drive interface, IDE
interface, parallel port, PS/2 mouse port,
serial ports (2), VGA feature connector, VGA
port, riser slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| VGA port | CN1 | Floppy drive | CN8 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | IDE interface | CN9 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | VGA feature | CN10 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN4 | External battery | CN11 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN5 | Speaker | J13 |
|-------------------+----------+------------------+----------|
| Ethernet 10Base5 | CN6 | Front panel | JP30 |
| connector | | connector | |
|-------------------+----------+------------------+----------|
| Ethernet 10BaseT | CN7 | Riser slot | SL1 |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| ? | Factory configured - do not | CN12 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| ? | Factory configured - do not | CN13 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| ? | Factory configured - do not | CN14 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| ? | Internal speaker enabled | J13 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Internal speaker disabled | J13 | Open |
|---+---------------------------------+-------+--------------|
| | External speaker enabled | J13 | Closed |
|---+---------------------------------+-------+--------------|
| ? | Monitor type select color | JP10 | Closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | JP10 | Open |
|---+---------------------------------+-------+--------------|
| ? | PS/2 mouse IRQ12 enabled | JP11 | Closed |
|---+---------------------------------+-------+--------------|
| | PS/2 mouse IRQ12 disabled | JP11 | Open |
|---+---------------------------------+-------+--------------|
| ? | On board video enabled | JP25 | Closed |
|---+---------------------------------+-------+--------------|
| | On board video disabled | JP25 | Open |
|---+---------------------------------+-------+--------------|
| ? | LAN interface enabled | JP31 | Open |
|---+---------------------------------+-------+--------------|
| | LAN interface disabled | JP31 | Closed |
|---+---------------------------------+-------+--------------|
| ? | System booted from hard drive | JP32 | Open |
|---+---------------------------------+-------+--------------|
| | System booted from network | JP32 | Closed |
|---+---------------------------------+-------+--------------|
| ? | LAN type select 10BaseT | JP37 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | LAN type select 10Base5 | JP37 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | None |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | None |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | TAG | TAG |
| | | | (U48) | (U49) | (U50) |
|-------+----------+---------+----------+----------+---------|
| 64KB | (4) 8K x | (4) 8K | (1) 8K x | None | (1) 16K |
| | 8 | x 8 | 8 | | x 4 |
|-------+----------+---------+----------+----------+---------|
| 128KB | (4) 32K | None | (1) 8K x | None | (1) 16K |
| | x 8 | | 8 | | x 4 |
|-------+----------+---------+----------+----------+---------|
| 256KB | (4) 32K | (4) 32K | (1) 8K x | (1) 8K x | (1) 16K |
| | x 8 | x 8 | 8 | 8 | x 4 |
|------------------------------------------------------------|
| Note: The location of banks 0 & 1 and the TAG are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 | JP13 | JP14 | JP15 | JP16 | JP17 |
|--------+-------+-------+--------+--------+--------+--------|
| None | 2 & 3 | 2 & 3 | Open | Open | Open | Open |
|--------+-------+-------+--------+--------+--------+--------|
| 64KB | 2 & 3 | 2 & 3 | Open | Open | Open | Open |
|--------+-------+-------+--------+--------+--------+--------|
| 128KB | 1 & 2 | 1 & 2 | Closed | Open | Open | Closed |
|--------+-------+-------+--------+--------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | Closed | Closed | Closed | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------+-------------------+-------------------|
| 1MB | 1MB | None |
|--------------------+-------------------+-------------------|
| 2MB | 1MB | 1MB |
|------------------------------------------------------------|
| Note: The size of the video memory chips is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP5 | JP6 |
|--------------------+-------------------+-------------------|
| 25MHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 33MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 50iMHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 66iMHz | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP3 |
|-----------+-------------------+-------------------+--------|
| 80486SX | Open | Pins 1 & 2 closed | Open |
|-----------+-------------------+-------------------+--------|
| 80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed | Closed |
|-----------+-------------------+-------------------+--------|
| 80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LAN DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP35 | JP36 |
|------------------+--------------------+--------------------|
| » | 5 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| | 6 | Pins 3 & 4 closed | Pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LAN IRQ SELECTION |
|------------------------------------------------------------|
| IRQ | JP34 |
|----------------------------+-------------------------------|
| | None | Open |
|---+------------------------+-------------------------------|
| » | IRQ5 | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | IRQ9 | Pins 3 & 4 closed |
|---+------------------------+-------------------------------|
| | IRQ10 | Pins 5 & 6 closed |
|---+------------------------+-------------------------------|
| | IRQ11 | Pins 7 & 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LAN I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | JP33 |
|----------------------------+-------------------------------|
| » | 300H | Pins 1 & 2, 3 & 4 closed |
|---+------------------------+-------------------------------|
| | 320H | Pins 3 & 4 closed |
|---+------------------------+-------------------------------|
| | 340H | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | 360H | Open |
+------------------------------------------------------------+