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# SIEMENS NIXDORF INFORMATIONSSYSTEME AG
SYSTEM BOARD D823
Processor Pentium
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB
Memory
Maximum Video None
Memory
Cache 256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), soft off power switch, soft off power
supply
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN1 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Front panel | X805 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN3 | Chassis fan | X806 |
| | | power | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Speaker | X809 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | Soft off power | X810 |
| | | switch | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Soft off power | X811 |
| | | supply | |
|-------------------+----------+------------------+----------|
| Floppy drive | CN7 | SCSI LED | X812 |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------------+-------+----------|
| » | Flash BIOS normal operation | SW1/1 | Off |
|---+-------------------------------------+-------+----------|
| | Flash BIOS recovery mode | SW1/1 | On |
|---+-------------------------------------+-------+----------|
| » | Password normal operation | SW1/2 | Off |
|---+-------------------------------------+-------+----------|
| | Password clear | SW1/2 | On |
|---+-------------------------------------+-------+----------|
| » | Port 0C91H bit 2 set to 1 | SW1/3 | Off |
|---+-------------------------------------+-------+----------|
| | Port 0C91H bit 2 set to 0 | SW1/3 | On |
|---+-------------------------------------+-------+----------|
| » | Port 0C91H bit 3 set to 1 | SW1/4 | Off |
|---+-------------------------------------+-------+----------|
| | Port 0C91H bit 3 set to 0 | SW1/4 | On |
|---+-------------------------------------+-------+----------|
| » | Flash BIOS write protect disabled | SW1/5 | Off |
|---+-------------------------------------+-------+----------|
| | Flash BIOS write protect enabled | SW1/5 | On |
|---+-------------------------------------+-------+----------|
| » | Floppy drive write protect disabled | SW1/6 | Off |
|---+-------------------------------------+-------+----------|
| | Floppy drive write protect enabled | SW1/6 | On |
|---+-------------------------------------+-------+----------|
| » | Factory configured - do not alter | SW1/7 | Off |
|---+-------------------------------------+-------+----------|
| » | System normal operation | SW1/8 | Off |
|---+-------------------------------------+-------+----------|
| | System runs POST tests | SW1/8 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM 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 |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 1M x 36 | (2) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x | (2) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 2M x 36 | (2) 1M x 36 | (2) 1M x | (2) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 1M x 36 | (2) 2M x 36 | (2) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 1M x | (2) 1M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 56MB | (2) 4M x 36 | (2) 1M x | (2) 1M x | (2) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 56MB | (2) 1M 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) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 4M x 36 | (2) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (2) 8M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 72MB | (2) 1M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (2) 1M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 8M x 36 | (2) 1M x | (2) 1M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 4M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 2M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 88MB | (2) 8M x 36 | (2) 1M x | (2) 1M x | (2) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 8M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 4M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 4M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 104MB | (2) 1M x 36 | (2) 4M x | (2) 4M x | (2) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (2) 8M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 8M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 8M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 136MB | (2) 1M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 144MB | (2) 2M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 160MB | (2) 8M x 36 | (2) 4M x | (2) 4M x | (2) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (2) 4M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 192MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 200MB | (2) 1M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 208MB | (2) 2M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 224MB | (2) 4M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 32M x | None | None | None |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
|------------------------------------------------------------|
| Note: Banks are interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB cache is factory installed and is not |
| configurable. The location is unidentified. |
+------------------------------------------------------------+