OSBYTE &A3
From BeebWiki
OSBYTE &A3 (163) - X=242 (Acornsoft GXR 1.20)
Y=0 resets the dot-dash pattern & length to defaults
Y=1..64 set dot dash pattern repeat length
Y=65 return status returns X=b0..5 current dot dash pattern repeat
length (0 means 64 though)
b6 if set flood fill is always active
b7 if set GXR ROM is turned on
Y=number of pages allocated to sprites
Y=66 return info on current sprite returns X=pixel width
Y=pixel height
if X=Y=0 then the ROM is not fitted, or no sprite is selected
X=242 (RISC OS 1.00)
Y=0 resets the dot-dash pattern & length to defaults
Y=1..64 set dot dash pattern repeat length
Y=65 return status returns X=b0..5 current dot dash pattern repeat
length (0 means 64 though)
b6 if set flood fill is always active
b7 if set sprites are always active
Y=66 return info on current sprite returns X=pixel width
Y=pixel height
X=243 (65Tube emulator)
Y=4 find code address, on exit if Y<>0, XY=address to jump to.
Called on Tube reset, *BASIC and NMIs to ask for any code
entry address
Y=6 find *command to execute, on exit if Y<>0, XY=>*command to
execute. Called on Tube reset to ask for any startup command.
X=255 (VIEW) Y=1 read VIEW's ROM workspace byte at &DF0+romnum. Y=&81 set VIEW's ROM workspace byte at &DF0+romnum to &80.
See Also
Jgharston 22:16, 26 May 2009 (UTC)
