CNESXO-20 Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	20MHz
Chip Set	Unknown
Max. Onboard DRAM	16MB
Cache	32/64KB
BIOS	AMI
Dimensions	330.2mm x 218.4mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Turbo LED	JP8
Speaker	J21	Reset switch	S2
Power LED & keylock	J22	Turbo switch	S3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP1	pins 2 & 3 closed
	CMOS memory clear	JP1	pins 1 & 2 closed

DRAM (SIMM) CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	(2) 1M x 9
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
9MB	(2) 256K x 9	(2) 256K x 9	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9	NONE	NONE
12MB	(2) 1M x 9	(2) 1M x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

DRAM (DIP) CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 44256 and (2) 41256	NONE	NONE	NONE
2MB	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256	NONE	NONE
3MB	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256	NONE
4MB	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256	(4) 44256 and (2) 41256

SRAM JUMPER CONFIGURATION
Size	JP3	JP4	JP5	JP6	JP7	JP100	JP101
32KB	pins 2 & 3	pins 1 & 2	pins 1 & 2	closed	open	pins 2 & 3	pins 1 & 2
64KB	pins 2 & 3	pins 2 & 3	pins 2 & 3	open	closed	pins 2 & 3	pins 2 & 3
Note:Pins designated should be in the closed posiiton.

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG
32KB	(4) 8K x 8	Banks 0 & 1	(2) 16K x 4
64KB	(2) 32K x 8	Bank 0	(2) 16K x 4