Processor	80486SX/80487SX/ODP486
Processor Speed	25MHz
Chip Set	Unidentified
Video Chip Set	Unidentified
Maximum Onboard Memory	32MB
Maximum Video Memory	1MB
Cache	None
BIOS	Unidentified
Dimensions	394mm x 381mm
I/O Options	CD-ROM interface, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port, VGA feature connector, VGA port, riser slot, audio connector, fax/data modem connector, CD-ROM adapter, modem port MIDI/game port, microphone connector, headphone connector, line out connector
NPU Options	80487SX

CONNECTIONS
Purpose	Location	Purpose	Location
VGA feature connector	CN1	Serial port	Unidentified
Floppy drive interface	CN2	Parallel port	Unidentified
CD audio connector	CN3	MIDI/game port	Unidentified
Fax/data modem connector	CN4	Microphone connector	Unidentified
CD-ROM interface	CN5	Headphone connector	Unidentified
CD-ROM adapter	CN6	Line out connector	Unidentified
IDE interface	CN7	VGA port	Unidentified
PS/2 mouse port	Unidentified	Riser slot	SL1

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	J9	Unidentified
»	Synthesizer IRQ15 enabled	J11	Closed
	Synthesizer IRQ15 disabled	J11	Open
»	Factory configured - do not alter	J12	Unidentified
»	Monitor type select color	J16	Closed
	Monitor type select monochrome	J16	Open
»	Factory configured - do not alter	J17	Unidentified
»	Waveform IRQ5 enabled	J21	Closed
	Waveform IRQ5 disabled	J21	Open
»	Monitor frequency select 31.5KHz	SW1/5	Off
	Monitor frequency select 40KHz	SW1/5	On
»	Factory configured - do not alter	SW1/6	On
»	VGA IRQ9 disabled	SW1/7	Off
	VGA IRQ9 enabled	SW1/7	On
»	On board video enabled	SW1/8	On
	On board video disabled	SW1/8	Off

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	None	None	None	(1) 1M x 36
6MB	(1) 512K x 36	(1) 512K x 36	(1) 256K x 36	(1) 256K x 36
8MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
8MB	None	None	(1) 1M x 36	(1) 1M x 36
8MB	None	None	None	(1) 2M x 36
10MB	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 512K x 36	(1) 512K x 36
12MB	None	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	None	None	(1) 2M x 36	(1) 2M x 36
18MB	(1) 2M x 36	(1) 2M x 36	(1) 256K x 36	(1) 256K x 36
20MB	(1) 2M x 36	(1) 2M x 36	(1) 512K x 36	(1) 512K x 36
24MB	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36

VIDEO MEMORY CONFIGURATION

Note: Board accepts 512KB/1MB of video memory. 512KB is factory installed and is not configurable. The size of the chips are unidentified. The number of banks is unidentified.

VIDEO RESOLUTION SELECTION (800 X 600)
Frequency		SW1/1	SW1/2
»	56Hz	Off	Off
	60Hz	Off	On
	72Hz	On	Off
	56Hz	On	On

VIDEO RESOLUTION SELECTION (1024 X 768)
Frequency		SW1/3	SW1/4
»	56Hz interlaced	Off	Off
	60Hz non-interlaced	Off	On