TULIP VISION LINE DT 486SX-25/DT 486DX-33I/DT 486DX-50I/ Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2/OverDrive DX2/OverDrive DX2 R
Processor Speed	25/33/50 (internal)/66iMHz
Chip Set	Unidentified
Max. Onboard DRAM	20MB
Cache	None
BIOS	Unidentified
Dimensions	280mm x 254mm
I/O Options	Parallel port, serial ports (2), VGA port, VGA feature connector, floppy drive interface, IDE interface
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	J1	VGA port	J6
LED, speaker, & battery	J2	VGA feature connector	J9
IDE interface	J3	Floppy drive interface	J10
Serial port 2	J4	Extra fan connector	J13
Parallel port	J5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery type select internal	J14	Open
	Battery type select external	J14	Closed
»	Parallel mode bidirectional	J15	pins 2 & 3 closed
	Parallel mode unidirectional	J15	pins 1 & 2 closed
»	Factory configured - do not alter	J17	pins 2 & 3 closed
»	PQFP CPU enabled	J18	pins 2 & 3 closed
	PQFP CPU disabled	J18	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	4MB	NONE
8MB	4MB	(4) 1MB x 9
20MB	4MB	(4) 4MB x 9
Note:Bank 0 is factory installed on the board and can not be changed. Its exact location and configuration is unidentified.

VRAM CONFIGURATION
Size	Bank 0	U6
512KB	512KB	NONE
1MB	512KB	(1) 512K x 8 ZIP
Note:Bank 0 is factory installed on the board and can not be changed. Its exact location and configuration is unidentified.