386A-40/33/25 (386AS) Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	25/33/40MHz
Chip Set	C & T
Max. Onboard DRAM	32MB
Cache	32/64/128/256KB
BIOS	AMI/Phoenix
Dimensions	330.2mm x 218.4mm
I/O Options	32-bit external memory card slot
NPU Options	80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J1	Turbo switch	J6
Power LED & keylock	J3	Turbo LED	JP4
External battery	J4	32-bit external memory card	S1
Reset switch	J5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP2	Open
	Monitor type select monochrome	JP2	Closed
»	Battery select internal	JP5	pins 2 & 3 closed
	Battery select external	JP5	pins 1 & 2 closed
»	NPU disabled	JP6	Closed
	NPU enabled	JP6	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1
32KB	(4) 8K x 8	NONE
64KB	(4) 8K x 8	(4) 8K x 8
128KB	(4) 32K x 8	NONE
256KB	(4) 32K x 8	(4) 32K x 8

CACHE JUMPER CONFIGURATION
Size	M1	M2	M3	M4	M5	M6	M7	M8	M9	M10
32KB	1 & 2	Open	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	Open	Open
64KB	1 & 2	Closed	1 & 2	2 & 3	1 & 2	1 & 2	Open	1 & 2	Open	1 & 2
128KB	1 & 2	Closed	2 & 3	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2	Closed	Open
256KB	2 & 3	Closed	2 & 3	2 & 3	2 & 3	2 & 3	Open	2 & 3	Closed	2 & 3
Note: Pins designated should be in the closed position.