TURBO XT Motherboard Settings and Configuration

Processor	8088
Processor Speed	8/10MHz
Chip Set	None
Max. Onboard DRAM	640MB
Cache	None
BIOS	ERSO/DTK
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	P4	Turbo switch	JP7
Turbo switch	JP5	Keylock	JP8
Turbo switch	JP6	Power LED & Turbo LED	JP9

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	JP1	N/A
»	Factory configured - do not alter	SW1/switch 1	Off
»	NPU enabled	SW1/switch 2	Off
	NPU disabled	SW1/switch 2	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3	JP3	JP3A	JP4	JP4A
256KB	(8) 4164	(8) 4164	(8) 4164	(8) 4164	Open	Closed	Open	Closed
256KB	(8) 41256	NONE	NONE	NONE	Closed	Open	Closed	Open
512KB	(8) 41256	(8) 41256	NONE	NONE	Closed	Open	Closed	Open
640KB	(8) 41256	(8) 41256	(8) 4164	(8) 4164	Closed	Open	Closed	Open

DRAM JUMPER CONFIGURATION
Size	SW1/switch 3	SW1/switch 4
128KB	Off	On
192KB	On	Off
256KB	Off	Off

MONITOR TYPE SELECTION
Type	SW1/switch 5	SW1/switch 6
None	On	On
Monochrome	Off	Off
Color 40 x 25	Off	On
Color 80 x 25	On	Off

FLOPPY DRIVE CONFIGURATION
Number of drives	SW1/switch 7	SW1/switch 8
1	On	On
2	Off	On
3	On	Off
4	Off	Off