SY-23D Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	20/25/33/50(internal)/66(internal)MHz
Chip Set	ETEQ
Max. Onboard DRAM	32MB
Cache	None
BIOS	AMI
Dimensions	241mm x 220mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J17	External battery	J20
Speaker	J18	Turbo switch	J21
Reset switch	J19	Turbo LED	J22

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	JP3	Open
	Monitor type select color	JP3	Closed
»	CMOS memory normal operation	JP5	pins 1 & 2 closed
	CMOS memory clear	JP5	pins 2 & 3 closed
»	PGA or PQFP CPU enabled	J23	Open
	PGA CPU enabled, PQFP CPU disabled	J23	Closed
Note:If using the "PGA or PQFP" setting (J23 open) please note that only one CPU can be installed.

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) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
32MB	(4) 4M x 9	(4) 4M x 9

CPU TYPE CONFIGURATION
Type	JP101	JP102	JP103	JP104
80486SX	Open	pins 2 & 3 closed	open	pins 2 & 3 closed
80487SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
ODP486SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
80486DX2	Closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed

CPU SPEED CONFIGURATION
Speed	OSC U24	J24	J25	J26
20MHz	40MHz	Open	Closed	Closed
25MHz	50MHz	Closed	Open	Closed
33MHz	66.67MHz	Closed	Closed	Open
50iMHz	50MHz	Closed	Open	Closed
66iMHz	66.67MHz	Closed	Closed	Open
Note:The location of socket U24 is unknown.