TURBO MAINBOARD (4.77/10MHZ) Motherboard Settings and Configuration

Processor	8088
Processor Speed	4.77/10MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	640KB
Maximum Video Memory	None
Cache	None
BIOS	Unidentified
Dimensions	276mm x 196mm
I/O Options	None
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	JP1	Turbo LED	JP5 pins 1 & 2
Keylock	JP3	Power LED	JP5 pins 3 & 4
Reset switch	JP4	Turbo switch	JP6

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	SW1/1	Off
»	NPU not installed	SW1/2	On
	NPU installed	SW1/2	Off
»	Factory configured - do not alter	SW1/3	Off
»	Factory configured - do not alter	SW1/4	Off

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 2A	Bank 3	Bank 3A
256KB	(9) 41256	None	None	None	None	None
512KB	(9) 41256	(9) 41256	None	None	None	None
576KB	(9) 41256	(9) 41256	(2) 4464	(1) 4164	None	None
640KB	(9) 41256	(9) 41256	(2) 4464	(1) 4164	(2) 4464	(1) 4164

FLOPPY DRIVE SELECTION
Drives installed	SW1/7	SW1/8
1	On	On
2	Off	On
3	On	Off
4	Off	Off

MONITOR SELECTION
Type	SW1/5	SW1/6
None	On	On
Color (40 x 20)	Off	On
Color (80 x 25)	On	Off
Monochrome	Off	Off

TURBO SELECTION
Type	JP7	JP8
Always in turbo mode	Pins 1 & 2 closed	Pins 2 & 3 closed
Turbo select through software	Pins 2 & 3 closed	Pins 1 & 2 closed
Turbo select through software & keyboard	Pins 1 & 2 closed	Pins 1 & 2 closed
Note: To toggle between normal and turbo modes, press CTRL, ALT, + to enable turbo and CTRL, ALT, - to disable turbo.