LASER 386M Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	25/33MHz
Chip Set	Unidentified
Max. Onboard DRAM	12MB
Cache	Unidentified
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J22	Turbo switch	J26
Reset switch	J24	Speaker	J28
Power LED & keylock	J25	External memory card	S1

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	EPROM chip type select 27128 or 2764	J13	pins 2 & 3 closed
	EPROM chip type select 27256	J13	pins 1 & 2 closed
»	SYSCLK enabled	J30	pins 2 & 3 closed
	SYSCLK disabled	J30	pins 1 & 2 closed
»	Battery type select internal	J31	pins 1 & 2 closed
	Battery type select external	J31	pins 2 & 3 closed
»	EGA BIOS access select on board	SW2/1	On
	EGA BIOS access select adapter card	SW2/1	Off
»	Memory type select 513KB to 640KB expansion bus enabled	SW2/2	On
	Memory type select expansion bus disabled	SW2/2	Off
»	NPU disabled	SW2/3	On
	NPU enabled	SW2/3	Off
»	Clock frequency speed select 25/33Mhz	SW2/4	Off
	Clock frequency speed select 8Mhz	SW2/4	On
»	Monitor type select monochrome	SW2/5	Off
	Monitor type select color	SW2/5	On

CACHE CONFIGURATION
Setting	J27
Enabled	pins 2 & 3 closed
Disabled	pins 1 & 2 closed
Note: The size and location of the cache is unidentified.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
1MB	(4) 256K x 9	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE
3MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE
6MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9	NONE
9MB	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9
12MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9

DRAM SWITCH CONFIGURATION
Size	SW1/1	SW1/2	SW1/3	SW1/4
1MB	On	Off	On	On
2MB	Off	On	On	On
3MB	Off	Off	On	On
4MB	On	Off	On	Off
5MB	Off	On	Off	On
6MB	Off	Off	Off	Off
8MB	Off	On	On	Off
9MB	Off	Off	Off	On
12MB	Off	Off	On	Off

MEMORY RELOCATION CONFIGURATION
Setting	SW2/5
Enabled	On
Disabled	Off

TECHNICAL NOTE

Note: The location of pin 1 is unidentified.