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# TANDY/RADIO SHACK
2500 SX/33
Processor 80386SX
Processor Speed 33MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 10MB
Memory
Maximum Video 1MB
Memory
Cache None
BIOS Unidentified
Dimensions 391mm x 384mm
I/O Options Floppy drive interface, IDE interface,
parallel port, PS/2 mouse port, serial port,
VGA port, riser slot, headphone connector,
volume control
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| VGA port | CN1 | Headphone | CN6 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN2 | IDE interface | CN7 |
|-----------------+----------+--------------------+----------|
| Parallel port | CN3 | Floppy drive | CN8 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Serial port | CN4 | Riser slot | SL1 |
|-----------------+----------+--------------------+----------|
| Volume control | CN5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------+--------+-------------------|
| ยป | On board video enabled | J1 | Pins 1 & 2 closed |
|---+---------------------------+--------+-------------------|
| | On board video disabled | J1 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------------+-------------------+----------------------|
| 2MB | 2MB | None |
|-----------------+-------------------+----------------------|
| 4MB | 2MB | (2) 1M x 9 |
|-----------------+-------------------+----------------------|
| 10MB | 2MB | (2) 4M x 9 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
| The location is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: Board accepts 512KB/1MB of video memory. The |
| size of the chips are unidentified. The number of |
| banks is unidentified. |
+------------------------------------------------------------+