TANDY/RADIO SHACK
3000 NL
|
Processor |
80286 |
|
Processor Speed |
10MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
8MB |
|
Maximum Video Memory |
None |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
431mm x 400mm |
|
I/O Options |
External memory card |
|
NPU Options |
80287 |
|
CONNECTIONS | |
|
Purpose |
Location |
|
External memory card |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Monitor type select monochrome |
J3 |
Pins 1 & 2 closed |
|
Monitor type select color |
J3 |
Pins 2 & 3 closed | |
|
|
Floppy drive address select primary |
S1/5 |
On |
|
Floppy drive address select secondary |
S1/5 |
Off | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
512KB |
(2) 256K x 9 |
None |
None |
None |
|
640KB |
(2) 256K x 9 |
(2) 64K x 9 |
None |
None |
|
1MB |
None |
None |
None |
None |
|
1.64MB |
None |
(2) 64K x 9 |
None |
None |
|
2MB |
None |
None |
None |
None |
|
4.64MB |
None |
(2) 64K x 9 |
None |
None |
|
5MB |
None |
None |
None |
None |
|
8MB |
None |
None |
None |
None |
|
Note: The location of banks 2 & 3 are unidentified. | ||||
|
DRAM CONFIGURATION (CONT) | ||||
|
Size |
Bank 0A |
Bank 1A |
Bank 2A |
Bank 3A |
|
512KB |
None |
None |
None |
None |
|
640KB |
None |
None |
None |
None |
|
1MB |
(2) 256K x 9 |
(2) 256K x 9 |
None |
None |
|
1.64MB |
(2) 256K x 9 |
None |
(2) 256K x 9 |
(2) 256K x 9 |
|
2MB |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 256K x 9 |
|
4.64MB |
(2) 256K x 9 |
None |
(2) 1M x 9 |
(2) 1M x 9 |
|
5MB |
(2) 256K x 9 |
(2) 256K x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
8MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
Note: Banks 0A, 1A, 2A, & 3A are located on the external memory card. | ||||
|
DRAM JUMPER CONFIGURATION | |
|
Size |
J7 |
|
512KB |
Pins 2 & 3, 4 & 5 closed |
|
640KB |
Pins 2 & 3, 4 & 5 closed |
|
1MB |
Pins 1 & 2, 5 & 6 closed |
|
1.64MB |
Pins 2 & 3, 5 & 6 closed |
|
2MB |
Pins 1 & 2, 5 & 6 closed |
|
4.64MB |
Pins 2 & 3, 5 & 6 closed |
|
5MB |
Pins 1 & 2, 5 & 6 closed |
|
8MB |
Pins 1 & 2, 5 & 6 closed |
|
Note: Banks 0A, 1A, 2A, & 3A are located on the external memory card. | |
|
NPU SPEED SELECTION | ||
|
Speed |
J4 |
J8 |
|
8MHz |
Pins 1 & 2 closed |
Pins 1 & 3 closed |
|
10MHz |
Pins 2 & 3 closed |
Pins 3 & 4 closed |
|
BIOS SELECTION | |||
|
Type |
J5 |
J6 | |
|
27128 |
Pins 1 & 2 closed |
Pins 2 & 3 closed | |
|
27256 |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
27512 |
Pins 2 & 3 closed |
Pins 1 & 2 closed | |
|
PARALLEL PORT IRQ SELECTION | ||||
|
IRQ |
J1 |
S1/1 |
S1/2 | |
|
IRQ7 |
Pins 2 & 3 closed |
On |
On | |
|
IRQ5 |
Pins 1 & 2 closed |
On |
Off | |
|
Disabled |
N/A |
Off |
N/A | |
|
SERIAL PORT IRQ SELECTION | ||||
|
IRQ |
J2 |
S1/3 |
S1/4 | |
|
IRQ4 |
Pins 1 & 2 closed |
On |
On | |
|
IRQ3 |
Pins 2 & 3 closed |
On |
Off | |
|
Disabled |
N/A |
Off |
N/A | |