TURBO 640 Motherboard Settings and Configuration

Processor	8088
Processor Speed	8MHz
Chip Set	None
Max. onboard DRAM	640KB
Cache	None
BIOS	Unknown
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo switch	JP5	Power/Turbo LED	JP9
Keylock	JP8	Speaker	P4
Note:The exact locations of JP5 and JP8 are unknown.

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	JP1	Unknown
»	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	JP4
256KB	(8) 4164	(8) 4164	(8) 4164	(8) 4164	A & B closed	B closed
256KB	(8) 41256	NONE	NONE	NONE	C & D closed	A closed
512KB	(8) 41256	(8) 41256	NONE	NONE	C & D closed	A closed
640KB	(8) 41256	(8) 41256	(8) 4164KB	(8) 4164KB	C & D closed	A closed

TURBO CONFIGURATION
Mode	JP6	JP7
Software switch	Open	Closed
Hardware switch	Closed	Open

DISPLAY CONFIGURATION
Display Adapter	SW1/5	SW1/6	SW1/7	SW1/8
None	On	On	N/A	N/A
Color/Graphics (40x20)	Off	On	On	On
Color/Graphics (80x25)	On	Off	On	On
Monochrome or Both	Off	Off	On	On

FLOPPY DRIVE CONFIGURATION
Drives Installed	SW1/7	SW1/8
1	On	On
2	Off	On
3	On	Off
4	Off	Off