Difference between revisions of "OSBYTE &A3"

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(Slight tweeks.)
m (Added link.)
 
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         X=242 Graphics Extension Support
 
         X=242 Graphics Extension Support
 
         X=243 65Tube
 
         X=243 65Tube
 +
        X=253 Cause a reset
 
         X=255 Acornsoft View family
 
         X=255 Acornsoft View family
 
     Y = parameter
 
     Y = parameter
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   Implemented by [http://mdfs.net/Software/BBC/SROM/Tools/ RSTROM] and other ROMs.
 
   Implemented by [http://mdfs.net/Software/BBC/SROM/Tools/ RSTROM] and other ROMs.
 +
  See also [[Reset from software]].
  
 
===X=&FF (255) Acornsoft View family workspace flag===
 
===X=&FF (255) Acornsoft View family workspace flag===
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==See Also==
 
==See Also==
 
* http://mdfs.net/Docs/Comp/BBC/Osbyte80
 
* http://mdfs.net/Docs/Comp/BBC/Osbyte80
 +
* [[Reset from software]]
  
 
[[User:Jgharston|Jgharston]] 22:16, 26 May 2009 (UTC)
 
[[User:Jgharston|Jgharston]] 22:16, 26 May 2009 (UTC)
 
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 02:26, 24 November 2020 (CET)
 
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 02:26, 24 November 2020 (CET)

Latest revision as of 18:30, 24 November 2020

OSBYTE &A3 (163) - Application support

 On entry:
   X = application identifier
       X=128 Electron Plus 1
       X=242 Graphics Extension Support
       X=243 65Tube
       X=253 Cause a reset
       X=255 Acornsoft View family
   Y = parameter
 On exit:
   X = return value
   Y = return value

X=&80 (128) Plus 1 Support

 On entry:
   Y=0 enable printer/ADC
   Y=1 disable printer/ADC
   Y=2 enable serial port
   Y=3 disable serial port
   Y=4 restore ROM table
 On exit:
   If Y<4 on entry,
     X=0 if enabled, X<>0 if disabled
   If Y=4 on entry,
     X=default language in X, b7 set if no default language

X=&F2 (242) Graphics Extension Support (GSX, RISC OS)

 On entry:
   Y=0     resets the dot-dash pattern and length to defaults
   Y=1..64 set dot dash pattern repeat length
 On entry:
   Y=65    return status returns
 On exit:
   X=b0..5 current dot dash pattern repeat length (0 means 64)
     b6    if set flood fill is always active
     b7    if set GXR ROM is turned on
   Y=number of pages allocated to sprites
 On entry:
   Y=66    return info on current sprite returns
 On exit:
   X=pixel width 
   Y=pixel height
   if X=Y=0 then the ROM is not fitted, or no sprite is selected

X=&F3 (243) 65Tube emulator

 On entry:
   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.
 On entry:
   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=&FD (253) Cause a Reset

 On entry:
   Y=OSBYTE &FD reset type:
     0 = Soft Reset (Break)
     1 = Power-On Reset
     2 = Hard Reset (Ctrl-Break)
 On exit:
   Will only exit if the call is not implemented.
 
 Implemented by RSTROM and other ROMs.
 See also Reset from software.

X=&FF (255) Acornsoft View family workspace flag

 On entry:
   Y<&80   read ROM's workspace byte at &DF0+romnum
   Y>&7F   set ROM's workspace byte at &DF0+romnum to &80
   
   Y=&01/&81 read/set View's ROM workspace byte
   Y=&02/&82 read/set ViewSheet's ROM workspace byte
   Y=&03/&83 read/set ViewStore's ROM workspace byte
   Y=&04/&84 read/set ViewSpell's ROM workspace byte
 On exit:
   X=ROM's workspace byte at &DF0+romnum
   
   Some versions of ViewSheet and ViewSpell do not implement the
   call to set the workspace byte.

See Also

Jgharston 22:16, 26 May 2009 (UTC) Jgharston (talk) 02:26, 24 November 2020 (CET)