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# TANDY/RADIO SHACK
3000HD (GATE ARRAY VERSION)
Processor 80286
Processor Speed 8MHz
Chip Set C & T
Video Chip Set None
Maximum Onboard Memory 1MB
Maximum Video Memory None
Cache None
BIOS Unidentified
Dimensions 462mm x 458mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| ยป | Monitor type select monochrome | J1 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select color | J1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (18) 41256 | None |
|------------------+--------------------+--------------------|
| 640KB | (18) 41256 | (18) 4164 |
|------------------+--------------------+--------------------|
| 1MB | (18) 41256 | (18) 41256 |
|------------------------------------------------------------|
| Note: The location of banks 0 & 1 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J2 | J3 |
|-------------------+--------------------+-------------------|
| 512KB | Closed | Open |
|-------------------+--------------------+-------------------|
| 640KB | Open | Closed |
|-------------------+--------------------+-------------------|
| 1MB | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION |
|------------------------------------------------------------|
| Type | J4 | J5 | J6 | J7 |
|-----------------+----------+----------+----------+---------|
| 16KB | Closed | Open | Closed | Open |
|-----------------+----------+----------+----------+---------|
| 32KB (not used) | Open | Closed | Open | Closed |
+------------------------------------------------------------+