80386 SX/16/20 Motherboard Settings and Configuration

UNIDENTIFIED

80386 SX/16/20

Processor
80386SX
Processor Speed
16/20MHz
Chip Set
C & T NEAT
Max. Onboard DRAM
8MB
Cache
None
BIOS
Unidentified
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
80387SX

CONNECTIONS
Purpose
Location
Purpose
Location
Reset switch
JP1
Turbo switch
JP4
Power LED & keylock
JP2
Turbo LED
JP5
Speaker
JP3
External battery
JP6

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
NPU mode select synchronous with CPU
JP8
Closed

NPU mode select asynchronous with CPU
JP8
Open
»
NPU disabled
JP9
Closed

NPU enabled
JP9
Open
»
Pipeline mode enabled
JP10
Closed

Pipeline mode disabled
JP10
Open
»
Monitor type select color
JP11
Closed

Monitor type select monochrome
JP11
Open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
512KB
(18) 41256
NONE
NONE
NONE
512KB
NONE
NONE
(2) 256K x 9
NONE
640KB
(18) 41256
(18) 4164
NONE
NONE
640KB
NONE
NONE
(2) 256K x 9
(2) 64K x 9
1MB
(18) 41256
(18) 41256
NONE
NONE
1MB
NONE
NONE
(2) 256K x 9
(2) 256K x 9
1.5MB
(18) 41256
(18) 41256
(2) 256K x 9
NONE
1.64MB
(18) 41256
(18) 4164
(2) 256K x 9
(2) 256K x 9
2MB
(18) 41256
(18) 41256
(2) 256K x 9
(2) 256K x 9
2MB
(18) 411000
NONE
NONE
NONE
2MB
NONE
NONE
(2) 1M x 9
NONE
3MB
(18) 41256
(18) 41256
(2) 1M x 9
NONE
4MB
(18) 411000
(18) 411000
NONE
NONE
4MB
NONE
NONE
(2) 1M x 9
(2) 1M x 9
4.64MB
(18) 41256
(18) 4164
(2) 1M x 9
(2) 1M x 9
5MB
(18) 41256
(18) 41256
(2) 1M x 9
(2) 1M x 9
6MB
(18) 411000
(18) 411000
(2) 1M x 9
NONE
8MB
(18) 411000
(18) 411000
(2) 1M x 9
(2) 1M x 9

DRAM JUMPER CONFIGURATION
Size
JP12
512KB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
512KB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
640KB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
640KB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
1MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
1MB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
1.5MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
1.64MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

DRAM JUMPER CONFIGURATION (CON’T)
Size
JP12
3MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
4MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
4MB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
4.64MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
5MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
6MB
pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
8MB
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

BATTERY CONFIGURATION
Type
JP6
JP7
Internal
pins 2 & 3 closed
pins 2 & 3 closed
External
Closed
pins 1 & 2 closed

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80386 SX/16/20 Motherboard Settings and Configuration

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Processor	80386SX
Processor Speed	16/20MHz
Chip Set	C & T NEAT
Max. Onboard DRAM	8MB
Cache	None
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	JP1	Turbo switch	JP4
Power LED & keylock	JP2	Turbo LED	JP5
Speaker	JP3	External battery	JP6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	NPU mode select synchronous with CPU	JP8	Closed
	NPU mode select asynchronous with CPU	JP8	Open
»	NPU disabled	JP9	Closed
	NPU enabled	JP9	Open
»	Pipeline mode enabled	JP10	Closed
	Pipeline mode disabled	JP10	Open
»	Monitor type select color	JP11	Closed
	Monitor type select monochrome	JP11	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
512KB	(18) 41256	NONE	NONE	NONE
512KB	NONE	NONE	(2) 256K x 9	NONE
640KB	(18) 41256	(18) 4164	NONE	NONE
640KB	NONE	NONE	(2) 256K x 9	(2) 64K x 9
1MB	(18) 41256	(18) 41256	NONE	NONE
1MB	NONE	NONE	(2) 256K x 9	(2) 256K x 9
1.5MB	(18) 41256	(18) 41256	(2) 256K x 9	NONE
1.64MB	(18) 41256	(18) 4164	(2) 256K x 9	(2) 256K x 9
2MB	(18) 41256	(18) 41256	(2) 256K x 9	(2) 256K x 9
2MB	(18) 411000	NONE	NONE	NONE
2MB	NONE	NONE	(2) 1M x 9	NONE
3MB	(18) 41256	(18) 41256	(2) 1M x 9	NONE
4MB	(18) 411000	(18) 411000	NONE	NONE
4MB	NONE	NONE	(2) 1M x 9	(2) 1M x 9
4.64MB	(18) 41256	(18) 4164	(2) 1M x 9	(2) 1M x 9
5MB	(18) 41256	(18) 41256	(2) 1M x 9	(2) 1M x 9
6MB	(18) 411000	(18) 411000	(2) 1M x 9	NONE
8MB	(18) 411000	(18) 411000	(2) 1M x 9	(2) 1M x 9

DRAM JUMPER CONFIGURATION
Size	JP12
512KB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
512KB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
640KB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
640KB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
1MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
1MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
1.5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
1.64MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
2MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

DRAM JUMPER CONFIGURATION (CON’T)
Size	JP12
3MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
4MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
4MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
4.64MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
5MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed
6MB	pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed
8MB	pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

BATTERY CONFIGURATION
Type	JP6	JP7
Internal	pins 2 & 3 closed	pins 2 & 3 closed
External	Closed	pins 1 & 2 closed