PA386SX-SMT-16/20/25 Motherboard Settings and Configuration

PEAKTRON COMPUTER, INC.

PA386SX-SMT-16/20/25

PA286-SMT-12/16/20/25

Processor
80286/80386SX
Processor Speed
12/16/20/25MHz
Chip Set
Peaktron
Max. Onboard DRAM
16MB
Cache
None
BIOS
AMI
Dimensions
248mm x 218mm
I/O Options
None
NPU Options
80287/80387

CONNECTIONS
Purpose
Location
Purpose
Location
Reset switch
J1
Speaker
J4
Turbo switch
J2
Power LED & Keylock
J5
Turbo LED
J3
External battery
JP1
Note:Motherboard is supplied with either an 80386SX & 80387SX socket or an 80286 & 80287 socket.

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Monitor type select monochrome
J7
open

Monitor type select color
J7
closed
»
NPU mode select synchronous with OSC1
J11
pins 2 & 3 closed

NPU mode select synchronous with oscillator at U49
J11
pins 1 & 2 closed

Bus speed select ATCLK/2
SW1/1
Off

Bus speed select ATCLK/3
SW1/1
On
»
Parity check enabled
SW1/2
On

Parity check disabled
SW1/2
Off
»
Shadow ram disabled
SW1/4
On

Shadow ram enabled
SW1/4
Off
Note:Socket at U49 may not be available on all boards.
If 8 bit SIMM/SIPPs are used, SW1/switch 2 must be open, otherwise it must be closed.

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
P - 0
P - 1
512KB
(4) 44256
NONE
NONE
NONE
(2) 41256
NONE
512KB
NONE
NONE
(2) 256K x 9
NONE
NONE
NONE
1MB
(4) 44256
(4) 44256
NONE
NONE
(2) 41256
(2) 41256
1MB
NONE
NONE
(2) 256K x 9
(2) 256K x 9
NONE
NONE
1.5MB
(4) 44256
(4) 44256
(2) 256K x 9
NONE
NONE
NONE
2MB
(4) 441000
NONE
NONE
NONE
(2) 411000
NONE
2MB
NONE
NONE
(2) 1M x 9
NONE
NONE
NONE
3MB
(4) 44256
(4) 44256
(2) 1M x 9
NONE
NONE
NONE
4MB
(4) 441000
(4) 441000
NONE
NONE
(2) 411000
(2) 411000
4MB
NONE
NONE
(2) 1M x 9
(2) 1M x 9
NONE
NONE
5MB
(4) 44256
(4) 44256
(2) 1M x 9
(2) 1M x 9
NONE
NONE
6MB
(4) 441000
(4) 441000
(2) 1M x 9
NONE
NONE
NONE
8MB
NONE
NONE
(2) 4M x 9
NONE
NONE
NONE
16MB
NONE
NONE
(2) 4M x 9
(2) 4M x 9
NONE
NONE

DRAM JUMPER/SWITCH CONFIGURATION
Size
J8
J9
SW1/5
SW1/6
SW1/7
SW1/8
512KB
2 & 3
1 & 2
Off
On
Off
Off
512KB
1 & 2
2 & 3
Off
On
Off
Off
1MB
2 & 3
1 & 2
Off
On
Off
On
1MB
1 & 2
2 & 3
Off
On
Off
On
1.5MB
2 & 3
1 & 2
Off
Off
On
Off
2MB
2 & 3
1 & 2
On
Off
Off
Off
2MB
1 & 2
2 & 3
On
Off
Off
Off
3MB
2 & 3
1 & 2
Off
On
On
On
4MB
2 & 3
1 & 2
On
Off
Off
On
4MB
1 & 2
2 & 3
On
Off
Off
On
5MB
2 & 3
1 & 2
Off
On
On
On
6MB
2 & 3
1 & 2
On
Off
On
Off
8MB
1 & 2
2 & 3
On
On
Off
Off
16MB
1 & 2
2 & 3
On
On
Off
On
Note:Pins designated should be in the closed position.

BIOS CONFIGURATION
Size
J10
J12
27256
pins 1 & 2 closed
Open
27512
pins 2 & 3 closed
Closed

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PA386SX-SMT-16/20/25 Motherboard Settings and Configuration

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Processor	80286/80386SX
Processor Speed	12/16/20/25MHz
Chip Set	Peaktron
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	248mm x 218mm
I/O Options	None
NPU Options	80287/80387

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	Speaker	J4
Turbo switch	J2	Power LED & Keylock	J5
Turbo LED	J3	External battery	JP1
Note:Motherboard is supplied with either an 80386SX & 80387SX socket or an 80286 & 80287 socket.

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Monitor type select monochrome	J7	open
	Monitor type select color	J7	closed
»	NPU mode select synchronous with OSC1	J11	pins 2 & 3 closed
	NPU mode select synchronous with oscillator at U49	J11	pins 1 & 2 closed
	Bus speed select ATCLK/2	SW1/1	Off
	Bus speed select ATCLK/3	SW1/1	On
»	Parity check enabled	SW1/2	On
	Parity check disabled	SW1/2	Off
»	Shadow ram disabled	SW1/4	On
	Shadow ram enabled	SW1/4	Off
Note:Socket at U49 may not be available on all boards. If 8 bit SIMM/SIPPs are used, SW1/switch 2 must be open, otherwise it must be closed.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3	P - 0	P - 1
512KB	(4) 44256	NONE	NONE	NONE	(2) 41256	NONE
512KB	NONE	NONE	(2) 256K x 9	NONE	NONE	NONE
1MB	(4) 44256	(4) 44256	NONE	NONE	(2) 41256	(2) 41256
1MB	NONE	NONE	(2) 256K x 9	(2) 256K x 9	NONE	NONE
1.5MB	(4) 44256	(4) 44256	(2) 256K x 9	NONE	NONE	NONE
2MB	(4) 441000	NONE	NONE	NONE	(2) 411000	NONE
2MB	NONE	NONE	(2) 1M x 9	NONE	NONE	NONE
3MB	(4) 44256	(4) 44256	(2) 1M x 9	NONE	NONE	NONE
4MB	(4) 441000	(4) 441000	NONE	NONE	(2) 411000	(2) 411000
4MB	NONE	NONE	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(4) 44256	(4) 44256	(2) 1M x 9	(2) 1M x 9	NONE	NONE
6MB	(4) 441000	(4) 441000	(2) 1M x 9	NONE	NONE	NONE
8MB	NONE	NONE	(2) 4M x 9	NONE	NONE	NONE
16MB	NONE	NONE	(2) 4M x 9	(2) 4M x 9	NONE	NONE

DRAM JUMPER/SWITCH CONFIGURATION
Size	J8	J9	SW1/5	SW1/6	SW1/7	SW1/8
512KB	2 & 3	1 & 2	Off	On	Off	Off
512KB	1 & 2	2 & 3	Off	On	Off	Off
1MB	2 & 3	1 & 2	Off	On	Off	On
1MB	1 & 2	2 & 3	Off	On	Off	On
1.5MB	2 & 3	1 & 2	Off	Off	On	Off
2MB	2 & 3	1 & 2	On	Off	Off	Off
2MB	1 & 2	2 & 3	On	Off	Off	Off
3MB	2 & 3	1 & 2	Off	On	On	On
4MB	2 & 3	1 & 2	On	Off	Off	On
4MB	1 & 2	2 & 3	On	Off	Off	On
5MB	2 & 3	1 & 2	Off	On	On	On
6MB	2 & 3	1 & 2	On	Off	On	Off
8MB	1 & 2	2 & 3	On	On	Off	Off
16MB	1 & 2	2 & 3	On	On	Off	On
Note:Pins designated should be in the closed position.

BIOS CONFIGURATION
Size	J10	J12
27256	pins 1 & 2 closed	Open
27512	pins 2 & 3 closed	Closed