Atari ST series - Page 339

The Line A Variable Table
pattern, while a nonzero value indicates a multiplane fill pat
tern.
+ 054 to +055 (+ $036 to + $037)
CLIP
Clipping flag. A 0 here turns clipping off, while any other
value turns it on.
+ 056 to +057 ( + $038 to +$039)
XINCL
Left edge of clip rectangle.
+ 058 to +059 ( + $03A to +$03B)
XMAXCL
Right edge of clip rectangle.
+ 060 to +061 (+$03C to + $03D)
YMINCL
Top of clip rectangle.
+ 062 to +063 (+ $03E to +$03F)
YMAXCL
Bottom of clip rectangle.
+ 064 to +065 (+ $040 to + $041)
XDDA
Accumulator for text scaling. Should be set to $8000 before
each TextBlt that requires scaling.
+ 066 to +067 (+ $042 to + $043)
DDAINC
Scaling increment. For scaling up, DDAINC = 256 * (Size2
- Sizel) / Sizel. For scaling down, DDAINC = 256 * (Size2)
/ Sizel, where Sizel is the actual character point size, and
Size2 is the scaled character size.
+ 068 to +069 ( + $044 to +$045)
SCALDIR
Text scaling direction (0 = down, 1 = up)
+ 070 to +071 ( + $046 to +$047)
MONO
Monospaced font flag.
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