TANDY/RADIO SHACK
3100, MMPC MODEL 10/20
SENSATION! (250-1651)
|
Processor |
80486SX/80487SX/ODP486/80486DX2 |
|
Processor Speed |
25/33/50(internal)/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
Unidentified |
|
Maximum Onboard Memory |
64MB |
|
Maximum Video Memory |
1MB |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
VGA port |
CN1 |
IDE interface |
CN6 |
|
Parallel port |
CN2 |
Floppy drive interface |
CN7 |
|
Serial port 2 |
CN3 |
VGA feature connector |
CN8 |
|
Serial port 1 |
CN4 |
Riser slot |
SL1 |
|
PS/2 mouse port |
CN5 |
IDE interface LED |
W2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Parallel port IRQ select IRQ7 |
W5 |
Pins 1 & 2 closed | |
|
Parallel port IRQ select IRQ5 |
W5 |
Pins 2 & 3 closed | |
|
Parallel port IRQ disabled |
W5 |
Open | |
|
» |
On board video enabled |
W8 |
Pins 2 & 3 closed |
|
On board video disabled |
W8 |
Pins 1 & 2 closed | |
|
» |
VGA IRQ disabled |
W9 |
Open |
|
VGA IRQ enabled |
W9 |
Closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(1) 1M x 32 |
None |
None |
None |
|
5MB |
(1) 1M x 32 |
(1) 256K x 32 |
None |
None |
|
6MB |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
None |
|
6MB |
(1) 1M x 32 |
(1) 512K x 32 |
None |
None |
|
7MB |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
7MB |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
None |
|
8MB |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
8MB |
(1) 1M x 32 |
None |
(1) 512K x 32 |
(1) 512K x 32 |
|
8MB |
(1) 1M x 32 |
(1) 1M x 32 |
None |
None |
|
8MB |
(1) 2M x 32 |
None |
None |
None |
|
9MB |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
9MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
None |
|
9MB |
(1) 2M x 32 |
(1) 256K x 32 |
None |
None |
|
10MB |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
10MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
10MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
None |
|
10MB |
(1) 2M x 32 |
None |
(1) 256K x 32 |
(1) 256K x 32 |
|
10MB |
(1) 2M x 32 |
(1) 512K x 32 |
None |
None |
|
11MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
11MB |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
11MB |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
None |
|
12MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
12MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
None |
|
12MB |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
12MB |
(1) 2M x 32 |
None |
(1) 512K x 32 |
(1) 512K x 32 |
|
12MB |
(1) 2M x 32 |
(1) 1M x 32 |
None |
None |
|
13MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
|
13MB |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
13MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
None |
|
14MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
|
14MB |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
14MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
14MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
None |
|
15MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
16MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
16MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
16MB |
(1) 2M x 32 |
None |
(1) 1M x 32 |
(1) 1M x 32 |
|
16MB |
(1) 2M x 32 |
(1) 2M x 32 |
None |
None |
|
16MB |
(1) 4M x 32 |
None |
None |
None |
|
17MB |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
17MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
None |
|
17MB |
(1) 4M x 32 |
(1) 256K x 32 |
None |
None |
|
18MB |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
18MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
18MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
None |
|
18MB |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
None |
|
18MB |
(1) 4M x 32 |
(1) 512K x 32 |
None |
None |
|
19MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
19MB |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
19MB |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
None |
|
20MB |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
20MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
20MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
None |
|
20MB |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
20MB |
(1) 4M x 32 |
None |
(1) 512K x 32 |
(1) 512K x 32 |
|
20MB |
(1) 4M x 32 |
(1) 1M x 32 |
None |
None |
|
21MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
|
21MB |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
21MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
None |
|
22MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
|
22MB |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
22MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
22MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
None |
|
23MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
24MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
24MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
None |
|
24MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
24MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
None |
|
24MB |
(1) 4M x 32 |
(1) 2M x 32 |
None |
None |
|
25MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
|
25MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
|
25MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
None |
|
26MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
|
26MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
26MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
26MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
None |
|
27MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
28MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
|
28MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
28MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
28MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
None |
|
29MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
|
30MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
|
32MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
32MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
32MB |
(1) 4M x 32 |
None |
(1) 2M x 32 |
(1) 2M x 32 |
|
32MB |
(1) 4M x 32 |
(1) 4M x 32 |
None |
None |
|
33MB |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
33MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 256K x 32 |
None |
|
34MB |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
34MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
34MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 512K x 32 |
None |
|
35MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 256K x 32 |
|
36MB |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
36MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 512K x 32 |
(1) 512K x 32 |
|
36MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
None |
|
37MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
|
38MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 512K x 32 |
|
40MB |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
40MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
40MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
None |
|
41MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
|
42MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 512K x 32 |
|
44MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
|
48MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
48MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
None |
|
49MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 256K x 32 |
|
50MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 512K x 32 |
|
52MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
|
56MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
|
64MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
VIDEO MEMORY CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
512KB |
None |
|
1MB |
512KB |
512KB |
|
Note: The size of the video memory chips are unidentified. | ||
|
CPU SPEED SELECTION | |
|
Speed |
W1 |
|
25MHz |
Closed |
|
33MHz |
Open |
|
50iMHz |
Closed |
|
66iMHz |
Open |
|
CPU TYPE SELECTION | ||
|
Type |
W6 |
W7 |
|
80486SX |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
80487SX |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
ODP486 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX2 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
Note: W7 may not be present on all boards. | ||
|
SERIAL PORT 1 ADDRESS SELECTION | |||
|
Setting |
IRQ |
W3 | |
| » |
COM1/COM3 |
IRQ4 |
Pins 1 & 2 closed |
|
COM3 |
IRQ11 |
Pins 2 & 3 closed | |
|
SERIAL PORT 2 ADDRESS SELECTION | |||
|
Setting |
IRQ |
W4 | |
| » |
COM2/COM4 (2F8h) |
IRQ3 |
Pins 1 & 2 closed |
|
COM4 |
IRQ10 |
Pins 2 & 3 closed | |