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C166 Introduction 
Compiling Programs 
Environment Settings Command Prompt ERRORLEVEL Output Files Listing (LST) File Preprocessor (I) File Object (OBJ) File Source (SRC) File Directives Reference ASM ASMEXPAND BROWSE BYTEALIGN CODE COMMONRET COMPACT COND DEBUG DEFINE DISABLE DYNAMICUSRSTK EJECT ENDASM EXTINS EXTMAC FIX_BR03 FIX166 FIX167 FIX272 FIX32F FIXBFLD FIXMDU FIXPEC FIXROM FLOAT64 HCOMPACT HLARGE HOLD INCDIR INIT LARGE LISTINCLUDE MAC MEDIUM MOD167 MODV2 NOALIAS NOAMAKE NOASMEXPAND NOCOND NODPPSAVE NOEXTEND NOFIXDPP NOFRAME NOINIT NOOBJECT NOPRINT NOREORDER NOSAVEMAC OBJECT OPTIMIZE ORDER PACK PAGELENGTH PAGEWIDTH PECDEF PREPRINT PREPRINTONLY PRINT REENTRANT REGFILE RENAMECLASS REORDER RESTORE SAVE SAVEMAC SAVESYS SAVEUSR SMALL SRC STATIC SYMBOLS TABS TINY UNSIGNED_CHAR USERSTACKDPP3 WARNING WARNINGLEVEL XLARGE Language Extensions Preprocessor Advanced Programming Error Messages Library Reference AppendixFIXMDU Compiler Directive
| Abbreviation | None. |
| Arguments | None. |
| Default | MUL and DIV instruction are not atomic. |
| µVision | Options — C166 — Misc Controls. |
| Description | The FIXMDU directive causes the C166 Compiler to insert an ATOMIC instruction prior to MUL and DIV instructions. This is required for some early Flash devices which require that MUL and DIV instruction are atomic. |
| Example | #pragma FIXMDU |
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