INTERSYSTEM 386/25 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	25MHz
Chip Set	Unidentified
Max. Onboard DRAM	16MB (on external memory card)
Cache	None
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card (2)
NPU Options	80287/80387DX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J2	Reset switch	JP3 or JP8
Speaker	J5	32-bit external memory card	SL1 & SL2
Power LED & keylock	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J4	N/A
»	Factory configured - do not alter	J7	N/A
»	Battery type select external	JP1	Open
	Battery type select internal	JP1	Closed
»	Monitor type select color	JP2	Closed
	Monitor type select monochrome	JP2	Open
»	Power good signal detect from power supply	JP4	pins 2 & 3 closed
	Power good signal detect from board	JP4	pins 1 & 2 closed
»	NPU synchronous with CPU	JP5	pins 1 & 2 closed
	NPU asynchronous with CPU	JP5	pins 1 & 2 closed

DRAM CONFIGURATION (EXTERNAL MEMORY CARD)
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
4MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE	NONE	NONE
6MB	(4) 1M x 9	(4) 256K x 9	(4) 256K x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9

NPU TYPE SELECT
Type		JP6	JP7
»	None	Closed	Open
	80287	Closed	Open
	80387	Open	Closed
Note: Exact location of JP6 & JP7 is approximate. Both jumpers are labeled on the board.