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# SIEMENS NIXDORF INFORMATIONSSYSTEME AG
SYSTEM BOARD PCD-4LSX, SYSTEM BOARD PCD-H
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/40/50(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 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 | CN7 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Parallel port | CN2 | Speaker | J13 |
|-----------------+----------+--------------------+----------|
| Serial port 2 | CN3 | External battery | J14 |
|-----------------+----------+--------------------+----------|
| Serial port 1 | CN4 | VGA feature | J23 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN5 | Front panel | JP30 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| IDE interface | CN6 | Riser slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| » | Onboard battery enabled | JP8 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Onboard battery disabled | JP8 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| » | Monitor type select color | JP10 | Closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | JP10 | Open |
|---+--------------------------------+-------+---------------|
| » | Mouse IRQ12 enabled | JP11 | Closed |
|---+--------------------------------+-------+---------------|
| | Mouse IRQ12 disabled | JP11 | Open |
|---+--------------------------------+-------+---------------|
| » | On board video enabled | JP25 | Closed |
|---+--------------------------------+-------+---------------|
| | On board video disabled | JP25 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | (4) 8K x | None | (1) 16K |
| | 8 | x 8 | 8 | | x 8 |
|-------+----------+---------+----------+----------+---------|
| 128KB | (4) 32K | None | (4) 8K x | None | (1) 16K |
| | x 8 | | 8 | | x 8 |
|-------+----------+---------+----------+----------+---------|
| 256KB | (4) 32K | (4) 32K | (4) 8K x | (4) 8K x | (1) 16K |
| | x 8 | x 8 | 8 | 8 | x 8 |
|------------------------------------------------------------|
| 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 are 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 (PQFP) | Pins 1 & 2 | Pins 2 & 3 | Closed |
| | closed | closed | |
|----------------+-----------------+----------------+--------|
| 80486SX (PGA) | Open | Pins 1 & 2 | Open |
| | | closed | |
|----------------+-----------------+----------------+--------|
| 80486DX (PGA) | Pins 1 & 2 | Pins 2 & 3 | Closed |
| | closed | closed | |
|----------------+-----------------+----------------+--------|
| 80486DX2 (PGA) | Pins 1 & 2 | Pins 2 & 3 | Closed |
| | closed | closed | |
+------------------------------------------------------------+