| <html lang="en"> |
| <head> |
| <title>Z80 Options - Using as</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Using as"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Z80_002dDependent.html#Z80_002dDependent" title="Z80-Dependent"> |
| <link rel="next" href="Z80-Syntax.html#Z80-Syntax" title="Z80 Syntax"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU Assembler "as". |
| |
| Copyright (C) 1991-2019 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 |
| or any later version published by the Free Software Foundation; |
| with no Invariant Sections, with no Front-Cover Texts, and with no |
| Back-Cover Texts. A copy of the license is included in the |
| section entitled ``GNU Free Documentation License''. |
| |
| --> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="Z80-Options"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Z80-Syntax.html#Z80-Syntax">Z80 Syntax</a>, |
| Up: <a rel="up" accesskey="u" href="Z80_002dDependent.html#Z80_002dDependent">Z80-Dependent</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">9.56.1 Options</h4> |
| |
| <p><a name="index-Z80-options-2668"></a><a name="index-options-for-Z80-2669"></a>The Zilog Z80 and Ascii R800 version of <code>as</code> have a few machine |
| dependent options. |
| |
| <a name="index-g_t_0040code_007b_002dz80_007d-command_002dline-option_002c-Z80-2670"></a> |
| <dl><dt><samp><span class="option">-z80</span></samp><dd>Produce code for the Z80 processor. There are additional options to |
| request warnings and error messages for undocumented instructions. |
| <br><dt><samp><span class="option">-ignore-undocumented-instructions</span></samp><dt><samp><span class="option">-Wnud</span></samp><dd>Silently assemble undocumented Z80-instructions that have been adopted |
| as documented R800-instructions. |
| <br><dt><samp><span class="option">-ignore-unportable-instructions</span></samp><dt><samp><span class="option">-Wnup</span></samp><dd>Silently assemble all undocumented Z80-instructions. |
| <br><dt><samp><span class="option">-warn-undocumented-instructions</span></samp><dt><samp><span class="option">-Wud</span></samp><dd>Issue warnings for undocumented Z80-instructions that work on R800, do |
| not assemble other undocumented instructions without warning. |
| <br><dt><samp><span class="option">-warn-unportable-instructions</span></samp><dt><samp><span class="option">-Wup</span></samp><dd>Issue warnings for other undocumented Z80-instructions, do not treat any |
| undocumented instructions as errors. |
| <br><dt><samp><span class="option">-forbid-undocumented-instructions</span></samp><dt><samp><span class="option">-Fud</span></samp><dd>Treat all undocumented z80-instructions as errors. |
| <br><dt><samp><span class="option">-forbid-unportable-instructions</span></samp><dt><samp><span class="option">-Fup</span></samp><dd>Treat undocumented z80-instructions that do not work on R800 as errors. |
| |
| <p><a name="index-g_t_0040code_007b_002dr800_007d-command_002dline-option_002c-Z80-2671"></a><br><dt><samp><span class="option">-r800</span></samp><dd>Produce code for the R800 processor. The assembler does not support |
| undocumented instructions for the R800. |
| In line with common practice, <code>as</code> uses Z80 instruction names |
| for the R800 processor, as far as they exist. |
| </dl> |
| |
| <p><a name="index-Z80-Syntax-2672"></a> |
| |
| </body></html> |
| |
