HP L 5 manual Table of Logical Operations

The result is computed below (source and pattern opaque).

Table 5-3. Logical Operation (ROP3)

						Bits
		7		6	5	4	3	2	1	0
Texture		1		1	1	1	0	0	0	0
Source		1		1	0	0	1	1	0	0
Destination		1		0	1	0	1	0	1	0
ROP3 (source & pattern)		1		1	1	1	1	1	0	0
				(decimal 252)
	Each column of destination, source, and texture values are the input
	to the logical function. The result, 252, is the value that would be sent
	to identify the logical operation (refer to page 5-12 for source/pattern
	transparency interactions).
	Table of Logical Operations
	The Logical Operations (ROP3) table (Table 5-4) shows the mapping
	between input values and their logical operations. Note that the
	logical operations are specified as RPN (reverse polish notation)
	equations. Here is a key to describe what the Boolean Function
	values mean;
	S = Source		a = AND
	T = Texture		o = OR
	D = Destination		n = NOT
			x = EXCLUSIVE OR
Note	Since logical operations are interpreted in RGB space (white = 1 and
	black = 0) rather than in CMY space (white = 0 and black = 1), the

results may not be intuitive. For example, ORing a white object with a black object in RGB space yields a white object. This is the same as ANDing the two objects in CMY space. It must be remembered that the printer operates in something similar to a CMY space and inverts the bits and reverses the order.

5-18 The PCL Print Model EN