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# SIEMENS NIXDORF INFORMATIONSSYSTEME AG
S26361-D824
Processor 80486SX/80486SX2/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 32MB
Memory
Maximum Video 1MB
Memory
Cache None
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options Floppy drive interface, IDE interface,
parallel port, PS/2 mouse port, serial ports
(2), video pass through connector, VGA port,
riser slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Video pass through | CN1 | IDE interface | CN7 |
| connector | | | |
|---------------------+----------+----------------+----------|
| PS/2 mouse port | CN2 | Floppy drive | CN8 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Serial port 1 | CN3 | Front panel | CN9 |
| | | connector | |
|---------------------+----------+----------------+----------|
| Serial port 2 | CN4 | Speaker | CN10 |
|---------------------+----------+----------------+----------|
| Parallel port | CN5 | Riser slot | SL1 |
|---------------------+----------+----------------+----------|
| VGA port | CN6 | Reset switch | X31 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| | On board video enabled | X60 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | On board video disabled | X60 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | VGA IRQ9 disabled | X161 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | VGA IRQ9 enabled | X161 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | PS/2 mouse IRQ12 enabled | X162 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | PS/2 mouse IRQ12 disabled | X162 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Monitor type select color | X165 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select monochrome | X165 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | CMOS memory normal operation | X166 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | X166 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Floppy drive write protect | X192 | Pins 1 & 2 |
| | disabled | | closed |
|---+-----------------------------------+-------+------------|
| | Floppy drive write protect | X192 | Pins 2 & 3 |
| | enabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-------------------+--------------------+-------------------|
| 512KB | 512KB | None |
|-------------------+--------------------+-------------------|
| 1MB | 512KB | 512KB |
|------------------------------------------------------------|
| Note: The size of the chip is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | X41 |
|----------------------------+-------------------------------|
| 25MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 33MHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 50iMHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 66iMHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | X33 |
|----------------------------+-------------------------------|
| 80486SX | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 80486SX2 | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX2 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | X32 |
|------------------------------+-----------------------------|
| » | Write through | Pins 1 & 2 closed |
|---+--------------------------+-----------------------------|
| | Write back | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| Note: The location of pin 1 on the connectors are |
| unidentified. Jumpers that are not labeled may be |
| factory configured. |
+------------------------------------------------------------+