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# SIEMENS-NIXDORF INFORMATIONSSYSTEME AG
SYSTEM BOARD D990
Device Type Mainboard
Processor Pentium
Processor Speed 90/100/120/133/150/166/200MHz
Chip Set Unidentified
Video Chip Set Matrox
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video 4MB (SGRAM supported)
Memory
Cache 128/256/512KB
BIOS Unidentified
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
game/MIDI port, IDE interfaces (2), parallel
port, PS/2 mouse port, serial port, VGA
feature connector, VGA port, cache slot, IR
connector, USB connector, ATX power
connector, audio in – CD-ROM
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | Front panel | C15 |
| connector | | connector | |
|-------------------+----------+------------------+----------|
| Voice modem | C1 | Game/MIDI port | CN1 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Auxiliary in | C2 | VGA port | CN2 |
|-------------------+----------+------------------+----------|
| Audio in – CD-ROM | C3 | Parallel port | CN3 |
|-------------------+----------+------------------+----------|
| Chip card reader | C4 | Serial port 1 | CN4 |
|-------------------+----------+------------------+----------|
| IR connector | C5 | USB connector | CN5 |
|-------------------+----------+------------------+----------|
| Reset switch | C6 | PS/2 mouse port | CN6 |
|-------------------+----------+------------------+----------|
| SCSI interface | C7 | VGA feature | CN7 |
| LED | | connector | |
|-------------------+----------+------------------+----------|
| Soft off power | C8 | IDE interface 1 | CN8 |
| supply | | | |
|-------------------+----------+------------------+----------|
| Chassis fan power | C9 | IDE interface 2 | CN9 |
|-------------------+----------+------------------+----------|
| Speaker | C10 | Floppy drive | CN10 |
| | | interface | |
|-------------------+----------+------------------+----------|
| I2C connector | C11 | 32-bit PCI slots | PC1 – |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| Wake on modem | C13 | Cache slot | SL1 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Power on | C14 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | C12 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Flash BIOS normal operation | SW1/5 | Off |
|---+---------------------------------+-------+--------------|
| | Flash BIOS recovery mode | SW1/5 | On |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/6 | Off |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | SW1/7 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Floppy drive write protect | SW1/8 | Off |
| | disabled | | |
|---+---------------------------------+-------+--------------|
| | Floppy drive write protect | SW1/8 | On |
| | enabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 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 EDO & SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL1 |
|----------------------------+-------------------------------|
| 128KB | 128KB module installed |
|----------------------------+-------------------------------|
| 256KB | 256KB module installed |
|----------------------------+-------------------------------|
| 512KB | 512KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | V1 |
|-----------------+-------------------+----------------------|
| 2MB | 2MB | None |
|-----------------+-------------------+----------------------|
| 4MB | 2MB | 2MB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier|SW1/1 |SW1/2 |SW1/3 |SW1/4 |
|---------+-----------+----------+------+------+------+------|
| 90MHz | 60MHz | 1.5x | Off | On | Off | Off |
|---------+-----------+----------+------+------+------+------|
| 100MHz | 66MHz | 1.5x | On | Off | Off | Off |
|---------+-----------+----------+------+------+------+------|
| 120MHz | 60MHz | 2x | Off | On | On | Off |
|---------+-----------+----------+------+------+------+------|
| 133MHz | 66MHz | 2x | On | Off | On | Off |
|---------+-----------+----------+------+------+------+------|
| 150MHz | 60MHz | 2.5x | Off | On | On | On |
|---------+-----------+----------+------+------+------+------|
| 166MHz | 66MHz | 2.5x | On | Off | On | On |
|---------+-----------+----------+------+------+------+------|
| 200MHz | 66MHz | 3x | On | Off | Off | On |
+------------------------------------------------------------+