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# SIEMENS NIXDORF
SYSTEM BOARD D1081
Device Type Mainboard
Processor Pentium II/Celeron
Processor Speed 233/266/300/333MHz
Chip Set Unidentified
Video Chip Set ATI
Maximum Onboard 256MB (SDRAM supported)
Memory
Maximum Video 2MB
Memory
Cache 0/128/256/512KB (located on the CPU)
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
IDE interfaces (2), parallel port, PS/2 mouse
port, serial ports (2), VGA port, USB
connectors (2), ATX power connector
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | PS/2 mouse port | CN5 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Chassis fan power | C1 | Serial port 1 | CN6 |
|-------------------+----------+------------------+----------|
| Front panel | C2 | Floppy drive | CN7 |
| connector | | interface | |
|-------------------+----------+------------------+----------|
| CPU fan power | C3 | IDE interface 1 | CN8 |
|-------------------+----------+------------------+----------|
| VGA port | CN1 | IDE interface 2 | CN9 |
|-------------------+----------+------------------+----------|
| USB connector 1 | CN2 | Serial port 2 | CN10 |
|-------------------+----------+------------------+----------|
| USB connector 2 | CN3 | 32-bit PCI slots | PC1 – |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------------+-------+----------|
| | Floppy drive write protect disabled | FWP | Open |
|---+-------------------------------------+-------+----------|
| | Floppy drive write protect enabled | FWP | Closed |
|---+-------------------------------------+-------+----------|
| » | Flash BIOS normal operation | RCV | Open |
|---+-------------------------------------+-------+----------|
| | Flash BIOS recovery mode | RCV | Closed |
|---+-------------------------------------+-------+----------|
| » | Factory configured - do not alter | SKP | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 16M x 64 | None |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 256MB | (1) 16M x 64 | (1) 16M x 64 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II |
| CPU. 128KB cache is located on the Celeron 300A & 333 |
| CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Note: 2MB of video memory is factory installed and is not |
| configurable. The location is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| CF1 | CF2 | CF3 | CF4 |
|---------+-----------+----------+-----+-------+------+------|
| 233MHz | 66MHz | 3.5x |Open |Closed | Open | Open |
|---------+-----------+----------+-----+-------+------+------|
| 266MHz | 66MHz | 4x |Open | Open |Closed|Closed|
|---------+-----------+----------+-----+-------+------+------|
| 300MHz | 66MHz | 4.5x |Open | Open |Closed| Open |
|---------+-----------+----------+-----+-------+------+------|
| 333MHz | 66MHz | 5x |Open | Open | Open |Closed|
+------------------------------------------------------------+