TANDY/RADIO SHACK
4100 MT
Processor |
80486SX/ODP486SX/80487SX/80486DX/80486DX2/ODP486DX2 |
Processor Speed |
25/33/50(internal)/66(internal)MHz |
Chip Set |
Unidentified |
Video Chip Set |
ATI |
Maximum Onboard Memory |
64MB |
Maximum Video Memory |
2MB |
Cache |
64/256KB |
BIOS |
Unidentified |
Dimensions |
330mm x 218mm |
I/O Options |
Floppy drive interface, IDE interface, VGA feature connector |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
IDE interface |
J22 |
Floppy drive interface |
J24 |
VGA feature connector |
J23 |
USER CONFIGURABLE SETTINGS | |||
Function |
Label |
Position | |
On board video enabled |
SW1/1 |
Off | |
On board video disabled |
SW1/1 |
On | |
|
Factory configured - do not alter |
SW1/2 |
Off |
|
Factory configured - do not alter |
SW1/3 |
Off |
Password enabled |
SW1/4 |
Off | |
Password disabled |
SW1/4 |
On | |
Monitor type select color |
SW1/5 |
On | |
Monitor type select monochrome |
SW1/5 |
Off | |
|
Factory configured - do not alter |
SW1/6 |
Off |
|
Factory configured - do not alter |
SW1/7 |
Off |
Setup access enabled |
SW1/8 |
Off | |
Setup access disabled |
SW1/8 |
On |
DRAM CONFIGURATION | ||||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
1MB |
(1) 256K x 36 |
None |
None |
None |
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
None |
None |
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
None |
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
4MB |
(1) 1M x 36 |
None |
None |
None |
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
None |
None |
6MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
None |
7MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
None |
None |
9MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
None |
10MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
13MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
16MB |
(1) 4M x 36 |
None |
None |
None |
17MB |
(1) 4M x 36 |
(1) 256K x 36 |
None |
None |
18MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
None |
19MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
21MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
None |
22MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
24MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
25MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
DRAM CONFIGURATION (CONT) | ||||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
28MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
None |
None |
33MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
None |
34MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
36MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
None |
37MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
49MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
52MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
CACHE CONFIGURATION | ||
Size |
Bank 0 |
TAG |
64KB |
(8) 8K x 8 |
(1) 8K x 8 |
256KB |
(8) 32K x 8 |
(1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||
Size |
E7 |
E8 |
64KB |
Open |
Open |
256KB |
Closed |
Closed |
VIDEO MEMORY CONFIGURATION |
Note: Board accepts 512KB/2MB of video memory. The size of the chips are unidentified. The number of banks is unidentified. |
CPU TYPE SELECTION | |||||
Type |
E9 |
E10 |
E11 |
E12 |
E13 |
80486SX |
Open |
2 & 3 |
1 & 2 |
Open |
2 & 3 |
ODP486SX |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
2 & 3 |
80487SX |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
2 & 3 |
80486DX |
2 & 3 |
1 & 2 |
1 & 2 |
Closed |
2 & 3 |
80486DX2 |
2 & 3 |
1 & 2 |
1 & 2 |
Closed |
2 & 3 |
ODP486DX2 |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
1 & 2 |
Note: Pins designated should be in the closed position. |