3000 NL Motherboard Settings and Configuration

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 (CON’T)
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

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3000 NL Motherboard Settings and Configuration

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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 (CON’T)
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