B&B Electronics PPIO manual Xor

For example:
Output_Byte	= 01010101b
Line_Number	= 3
Status	= 1

00000001b	(1 decimal)
shift-right 3	(Line_Number) =	00001000b
	XOR	11111111b
		11110111b (mask 1)
	AND	01010101b	(Output_Byte)
00000001b	(Status)	01010101b
shift-right 3	(Line_Number) = OR	00001000b	(mask 2)

01011101b (New Output_Byte)

For an example of an application that uses these functions, look at the source code in PPIO.PAS.

PPIO2899 Manual 17

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104