Processor	80486SX/80487SX (on external CPU/Memory module)
Processor Speed	25MHz
Chip Set	AST
Max. Onboard DRAM	None (16MB on external CPU/Memory module)
Cache	None
BIOS	AST
Dimensions	344mm x 250mm
I/O Options	32-bit external CPU/Memory module slot 32-bit external Memory module slot (2) bus mouse port, floppy drive interface IDE interface, parallel port, serial port (2), SVGA port
NPU Options	4167 (on external CPU/Memory module)

CONNECTIONS
Purpose	Location	Purpose	Location
SVGA port	CN1	Third floppy drive interface	J25
Bus mouse port	CN2	External battery	J26
Serial port 1 (COM1)	CN3	Speaker	J27
Serial port 2 (COM2)	CN4	Fan power	J28
Parallel port	J13	Front panel switches & LEDs	J29
VGA pass-through	J19	IDE interface LED	J40
IDE interface	J22	32-bit external CPU/Memory module	S1
Floppy drive interface	J24	32-bit external Memory module slots	S2 & S3

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	CMOS memory normal operation	SW1/switch 1	open
	CMOS memory clear	SW1/switch 1	closed
»	Password check enabled	SW1/switch 2	open
	Password check disabled	SW1/switch 2	closed
»	Flash BIOS write disabled	SW1/switch 3	open
	Flash BIOS write enabled	SW1/switch 3	closed
»	VGA port enabled	SW1/switch 4	closed
	VGA port disabled	SW1/switch 4	open
»	Factory configured - do not alter	E1	closed
»	Factory configured - do not alter	E2	pins 1 & 2 closed
»	Factory configured - do not alter	E3	closed
»	Factory configured - do not alter	E4	open
»	Factory configured - do not alter	E5	open

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Parity check enabled	E1	closed
	Parity check disabled	E1	open
»	Factory configured - do not alter	E2	closed
Note:AST CPU/Memory module part number is 202439-002.

DRAM CONFIGURATION
Size	Bank 0	Bank 1
2MB	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9
16MB	(2) 4M x 9	(2) 4M x 9
Notes:128KB of DRAM is reserved for System and VGA BIOS shadowing and cannot be disabled. Up to two of the following memory boards may be installed in addition to the CPU/Memory module: AST part numbers 202275-004, 202275-006, 202387-001, or 202387-005.