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# TOP MICROSYSTEMS, INC.
286 MODEL-1007-200, VER 1.25
Processor 80286
Processor Speed 12/16/20MHz
Chip Set C & T
Max. Onboard DRAM 1MB
Cache None
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options 16-bit external memory card slot
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Speaker | J1 | Power LED & keylock | J4 |
|--------------+----------+-----------------------+----------|
| Reset switch | J2 | External battery | J6 |
|--------------+----------+-----------------------+----------|
| Turbo LED | J3 | 16-bit external | S1 |
| | | memory card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | J5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | NPU is synchronous with CPU | J19 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU is synchronous with | J19 | pins 1 & 2 |
| | oscillator installed at U17 | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (18) 41256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (18) 41256 | (18) 4164 |
|------------------+--------------------+--------------------|
| 1MB | (18) 41256 | (18) 41256 |
+------------------------------------------------------------+