AT286 Motherboard Settings and Configuration

Processor	80286
Processor Speed	12/16MHz
Chip Set	Headland
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI/Award/Phoenix
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	JP6	Turbo LED	T1
Power LED & keylock	J20	Turbo switch	T2
Speaker	SP

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	NPU speed select 10MHz	J21	pins 1 & 2 closed
	NPU speed select 6MHz	J21	pins 2 & 3 closed
»	Wait state select 0	0WS	Closed
	Wait state select 1	0WS	Open
»	Monitor type select color	DSP1/2	On
	Monitor type select monochrome	DSP1/2	Off
»	BIOS type select 27128	DSP1/5	On
	BIOS type select 27256	DSP1/5	Off

DRAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(18) 41256	NONE
640KB	(18) 41256	(18) 4164
1MB	(18) 41256	(18) 41256
640KB + EMS (16KB x 24 pages)	(18) 41256	(18) 41256
2MB	(18) 411000	NONE
640KB + EMS (16KB x 88 pages)	(18) 411000	NONE
4MB	(18) 411000	(18) 411000
640KB + EMS (16KB x 216 pages)	(18) 411000	(18) 411000

DRAM SWITCH CONFIGURATION
Size	DSP1/6	DSP1/7	DSP1/8
512KB	On	On	On
640KB	On	On	Off
1MB	On	Off	On
640KB + EMS (16KB x 24 pages)	On	Off	Off
2MB	Off	On	On
640KB + EMS (16KB x 88 pages)	Off	On	Off
4MB	Off	Off	On
640KB + EMS (16KB x 216 pages)	Off	Off	Off