PX-3000 TURBO XT Motherboard Settings and Configuration

Processor	8088
Processor Speed	12MHz
Chip Set	Peaktron
Max. Onboard DRAM	640KB
Cache	None
BIOS	Peaktron
Dimensions	218mm x 187mm
I/O Options	None
NPU Options	8087

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	Turbo switch	J14
Keylock	J2	Turbo LED	J15
Speaker	J13	Power LED	J16

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Parity check enabled	P1	Open
	Parity check disabled	P1	Closed
»	CPU speed select switchable at turbo turbo switch	P2	pins 1 & 2 closed
	CPU speed select switchable at keyboard	P2	pins 2 & 3 closed
»	Factory configured - do not alter	SW1/1	N/A
»	Factory configured - do not alter	SW1/2	N/A
»	Factory configured - do not alter	SW1/3	N/A
»	Factory configured - do not alter	SW1/4	N/A

DRAM CONFIGURATION
Size	U28 - U29	U15 - U18	U19 - U22	U28 - 31	U34
256KB	(2) 44256	NONE	NONE	NONE	NONE
256KB	NONE	(4) 41256	(4) 41256	NONE	NONE
512KB	NONE	NONE	NONE	(4) 44256	NONE
640KB	NONE	NONE	NONE	(4) 44256	NONE

DRAM PARITY CONFIGURATION
Size	U23	U43	U48
256KB	(1) 41256	NONE	NONE
256KB	(1) 41256	NONE	NONE
512KB	(1) 41256	(1) 41256	NONE
640KB	(1) 41256	(1) 41256	NONE
Note:One (1) 411000 can be used in location U23 for parity with all memory sizes.

DRAM PARITY JUMPER CONFIGURATION
Size	P3	P4
256KB	pins 2 & 3 closed	pins 2 & 3 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed
512KB	pins 2 & 3 closed	pins 2 & 3 closed
640KB	pins 1 & 2 closed	pins 1 & 2 closed

VIDEO CONFIGURATION
Size	SW1/5	SW1/6
None	On	On
Color (40 x 20)	Off	On
Color (80 x 25)	On	Off
Monochrome	Off	Off

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