ACE - 386SX - AR1 Motherboard Settings and Configuration

Processor	80386SX (exact location unknown)
Processor Speed	16/20/25/33MHz
Chip Set	Acer
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	220mm x 220mm
I/O Options	None
NPU Options	80387SX (exact location unknown)

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J4	Turbo switch	J8 pins 1 - 3
Reset switch	J6	Turbo LED	J8 pins 4 - 5
Speaker	J7	Power LED & keylock	J9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	ADS delay disabled	J5	pins 2 & 3 closed
	ADS delay enabled	J5	pins 1 & 2 closed
»	NPU synchronous with CPU	JP2	pins 1 & 2 closed
	NPU asynchronous with CPU	JP2	pins 2 & 3 closed
»	Factory configured - do not alter	JP3	N/A
»	Monitor type select monochrome	JP4	pins 1 & 2 closed
	Monitor type select color	JP4	pins 2 & 3 closed
»	Parity check disabled	JP6	Open
	Parity check enabled	JP6	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
512KB	(1) 256K x 9	(1) 256K x 9	NONE	NONE
1MB	(1) 256K x 9	(1) 256K x 9	(1) 256K x 9	(1) 256K x 9
2MB	(1) 1M x 9	(1) 1M x 9	NONE	NONE
4MB	(1) 1M x 9	(1) 1M x 9	(1) 1M x 9	(1) 1M x 9
8MB	(1) 4M x 9	(1) 4M x 9	NONE	NONE
16MB	(1) 4M x 9	(1) 4M x 9	(1) 4M x 9	(1) 4M x 9

CPU SPEED CONFIGURATION
Speed	JP1	JP5
16MHz	pins 1 & 2 closed	pins 1 & 2 closed
20MHz	pins 2 & 3 closed	pins 1 & 2 closed
25MHz	pins 1 & 2 closed	pins 2 & 3 closed
33MHz	pins 2 & 3 closed	pins 2 & 3 closed