TURBO PC Motherboard Settings and Configuration

Processor	8088-2
Processor Speed	7.33MHz
Chip Set	None
Max. Onboard DRAM	640KB
Cache	None
BIOS	PC's Ltd.
Dimensions	355mm x 304mm
I/O Options	None
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J2	Reset switch	JP1
Turbo LED & Power LED	J3	Alternate DC power plug	P3
Note:P3 may not be present on all boards.

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
	Factory configured - do not alter	J5	Open
»	CPU speed select fast	J6	pins 1 & 2 closed
	CPU speed select slow	J6	pins 2 & 3 closed
»	Self-test disabled	SW2/1	On
	Self-test enabled	SW2/1	Off
»	NPU disabled	SW2/2	On
	NPU enabled	SW2/2	Off
»	Factory configured - do not alter	SW2/4	Off
	Color adjust	VC1	Variable

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
256KB	(9) 41256	NONE	NONE
640KB	(9) 41256	(9) 41256	(18) 4164

DRAM JUMPER CONFIGURATION
Size	J4
256KB	pins 2 & 3 closed
640KB	pins 1 & 2 closed

DRAM SWITCH CONFIGURATION
Size	SW2/3	SW3/1	SW3/2	SW3/3	SW3/4	SW3/5	SW3/6	SW3/7	SW3/8
256KB	On	On	Off	On	Off	On	Off	On	Off
640KB	Off	Off	On	Off	On	Off	On	Off	On

DRAM SWITCH CONFIGURATION (CON’T)
Size	SW4/1	SW4/2	SW4/3	SW4/4	SW4/5	SW4/6	SW4/7	SW4/8
256KB	On	Off	On	Off	On	Off	On	Off
640KB	Off	On	Off	On	Off	On	Off	On

FLOPPY DRIVE CONFIGURATION
Drives installed	SW2/7	SW2/8
1	On	On
2	Off	On
3	On	Off
4	Off	Off

MONITOR CONFIGURATION
Type	SW2/5	SW2/6
Monochrome	Off	Off
40 x 25 color	Off	On
80 x 25 color	On	Off