3100, MMPC MODEL 10/20 Motherboard Settings and Configuration

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

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3100, MMPC MODEL 10/20 Motherboard Settings and Configuration

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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

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