HT12HS Motherboard Settings and Configuration

Processor	80286
Processor Speed	12/16/20MHz
Chip Set	VLSI
Max. Onboard DRAM	4MB
Cache	None
BIOS	AMI/Eurosoft/Quadtel
Dimensions	220mm x 220mm
I/O Options	None
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Auxiliary keyboard connector	JP1	Turbo switch	JP10
External battery	JP2	Reset switch	JP11
Speaker	JP8	Power LED & keylock	JP12
Turbo LED	JP9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
	Monitor type select color	JP3	Closed
	Monitor type select monochrome	JP3	Open
	CMOS memory normal operation	JP4	Closed
	CMOS memory clear	JP4	Open
	BIOS type select 27256	JP5	pins 2 & 3 closed
	BIOS type select 27128	JP5	pins 1 & 2 closed
	NPU speed select 4.77MHz	JP6	pins 1 & 2 closed
	NPU speed select 10.6MHz	JP6	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	P 0	Bank 1	P 1	Bank 0A	Bank 1A
512KB	(4) 44256	(2) 41256	NONE	NONE	NONE	NONE
640KB	(4) 44256	(2) 41256	(4) 4464	(2) 4164	NONE	NONE
1MB	(4) 44256	(2) 41256	(4) 44256	(2) 41256	NONE	NONE
2MB	NONE	NONE	NONE	NONE	(2) 1M x 9	NONE
4MB	(4) 441000	(2) 411000	(4) 441000	(2) 411000	NONE	NONE
4MB	NONE	NONE	NONE	NONE	(2) 1M x 9	(2) 1M x 9

CPU SPEED CONFIGURATION
System clock	Bus clock	DRAM speed	JP7
12MHz	8MHz asynch	100ns	Open
12MHz	6MHz synch	100ns	Closed
16MHz	8MHz synch	80ns	Closed
20MHz	8MHz asynch	60/70ns	Open
20MHz	10MHz synch	60/70ns	Closed

MISCELLANEOUS TECHNICAL NOTE

Note: The location of pin 1 is unidentified.