(as) Z80 Options

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(as) Z80-Dependent

(as) Z80 Syntax

 
 9.36.1 Options
 --------------
 
 The Zilog Z80 and Ascii R800 version of `as' have a few machine
 dependent options.
 `-z80'
      Produce code for the Z80 processor. There are additional options to
      request warnings and error messages for undocumented instructions.
 
 `-ignore-undocumented-instructions'
 `-Wnud'
      Silently assemble undocumented Z80-instructions that have been
      adopted as documented R800-instructions.
 
 `-ignore-unportable-instructions'
 `-Wnup'
      Silently assemble all undocumented Z80-instructions.
 
 `-warn-undocumented-instructions'
 `-Wud'
      Issue warnings for undocumented Z80-instructions that work on
      R800, do not assemble other undocumented instructions without
      warning.
 
 `-warn-unportable-instructions'
 `-Wup'
      Issue warnings for other undocumented Z80-instructions, do not
      treat any undocumented instructions as errors.
 
 `-forbid-undocumented-instructions'
 `-Fud'
      Treat all undocumented z80-instructions as errors.
 
 `-forbid-unportable-instructions'
 `-Fup'
      Treat undocumented z80-instructions that do not work on R800 as
      errors.
 
 `-r800'
      Produce code for the R800 processor. The assembler does not support
      undocumented instructions for the R800.  In line with common
      practice, `as' uses Z80 instruction names for the R800 processor,
      as far as they exist.
 

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