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# SIEMENS NIXDORF
SYSTEM BOARD D873
Device Type Mainboard
Processor Pentium
Processor Speed 100/133/166MHz
Chip Set Intel
Video Chip Set Tseng Labs
Maximum Onboard 512MB
Memory
Maximum Video 1MB
Memory
Cache 512KB
BIOS Unidentified
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
IDE interface, parallel port, PS/2 mouse
port, serial ports (2), VGA port, cache slot
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| Chassis fan power | C1 | CAN bus control | C16 |
| | | 1 | |
|--------------------+----------+-----------------+----------|
| Aux voltage | C2 | PS/2 mouse port | CN1 |
| PRIMERGY 500/700 | | | |
|--------------------+----------+-----------------+----------|
| Power supply | C3 | Serial port 2 | CN2 |
| PRIMERGY 500/700 | | | |
|--------------------+----------+-----------------+----------|
| SCSI interface LED | C4 | Serial port 1 | CN3 |
|--------------------+----------+-----------------+----------|
| Chassis fan power | C5 | Parallel port | CN4 |
|--------------------+----------+-----------------+----------|
| Temperature sensor | C6 | VGA port | CN5 |
|--------------------+----------+-----------------+----------|
| Speaker | C7 | Floppy drive | CN6 |
| | | interface | |
|--------------------+----------+-----------------+----------|
| Front panel | C8 | IDE interface | CN7 |
| connector | | | |
|--------------------+----------+-----------------+----------|
| Front panel | C9 | 5v power supply | P1 |
| connector | | | |
|--------------------+----------+-----------------+----------|
| On/off switch | C10 | 5v power supply | P2 |
|--------------------+----------+-----------------+----------|
| Temperature sensor | C11 | 3.3v power | P3 |
| | | supply | |
|--------------------+----------+-----------------+----------|
| Temperature sensor | C12 | 32-bit PCI | PC1 – |
| | | slots | PC4 |
|--------------------+----------+-----------------+----------|
| Soft off power | C13 | Cache slot | SL1 |
| supply | | | |
|--------------------+----------+-----------------+----------|
| Remote on | C14 | VRM connector | VRM |
| connector | | | |
|--------------------+----------+-----------------+----------|
| CAN bus control 2 | C15 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | BIOS normal operation | SW1/1 | Off |
|---+---------------------------------+-------+--------------|
| | BIOS recovery mode | SW1/1 | On |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | BIOS write protect disabled | SW1/5 | Off |
|---+---------------------------------+-------+--------------|
| | BIOS write protect enabled | SW1/5 | On |
|---+---------------------------------+-------+--------------|
| » | Floppy drive write protect | SW1/6 | Off |
| | disabled | | |
|---+---------------------------------+-------+--------------|
| | Floppy drive write protect | SW1/6 | On |
| | enabled | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/7 | Off |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/8 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+-------------+-------------+-----------+----------|
| 8MB | (2) 1M x 36 | None | None | None |
|---------+-------------+-------------+-----------+----------|
| 16MB | (2) 2M x 36 | None | None | None |
|---------+-------------+-------------+-----------+----------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None | None |
|---------+-------------+-------------+-----------+----------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 1M x | (2) 1M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 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 |
|-------+-------------+------------+------------+------------|
| 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 |
|-------+-------------+------------+------------+------------|
| 136MB | (2) 16M x | (2) 1M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 144MB | (2) 16M x | (2) 2M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 160MB | (2) 16M x | (2) 4M x | None | None |
| | 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) 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 |
|-------+-------------+------------+------------+------------|
| 272MB | (2) 16M x | (2) 16M x | (2) 1M x | (2) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 288MB | (2) 16M x | (2) 16M x | (2) 2M x | (2) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 320MB | (2) 16M x | (2) 16M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 384MB | (2) 16M x | (2) 16M x | (2) 16M x | None |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 512MB | (2) 16M x | (2) 16M x | (2) 16M x | (2) 16M x |
| | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL1 |
|----------------------------+-------------------------------|
| 0KB | Not installed |
|----------------------------+-------------------------------|
| 512KB | 512KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: The location of the video memory is unidentified. |
+------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier|X400/pins|X400/pins|X400/pins|X400/pins|
|speed |speed| | 1 & 2 | 3 & 4 | 5 & 6 | 7 & 8 |
|------+-----+----------+---------+---------+---------+---------|
|100MHz|66MHz| 1.5x | Open | Closed | Open | Open |
|------+-----+----------+---------+---------+---------+---------|
|133MHz|66MHz| 2x | Open | Closed | Closed | Open |
|------+-----+----------+---------+---------+---------+---------|
|166MHz|66MHz| 2.5x | Open | Closed | Closed | Closed |
+---------------------------------------------------------------+