**CIGAL Reference Manual, Chapter 4 (Variables): aflags**
===== Aflags -- Integer variable controlling arithmetic options =====
**usage:  aflags = value**

AFLAGS is an internally defined integer variable controlling options related to
how CIGAL executes some arithmetic operations.  The value of the AFLAGS parameter
can be changed at any time and remains set until it is explicitly modified again.
The meanings of the different AFLAGS settings are summarized below.  Adding
values can combine options.
      Value  (octal)   Meaning
       0-3    0-3o     Data transfer mode for computer screen I/O
                         0 - replace old value with new
                         1 - AND new value with old value
                         2 - OR new value with old value
                         3 - XOR new value with old value
                       (Note: flags 1-3 only work in 4-bit graphics mode)
        4      4o      Don't clip byte values, let them wrap around; otherwise
                        values < 0 become 0, values > 255 become 255.
        8     10o      Don't swap bitplanes to pixels during screen I/O
       64    100o      In graphics editor: smear image when moving blocks

**See Also:**\\
[[jvs:cigal|CIGAL Home]], 
[[jvs:cigal:manual|CIGAL Manual]], 
[[jvs:cigal:manual:chapter4|Variables List]], 
[[jvs:cigal:manual:help|Manual Help]]