C/C++ Users Group Library 1996 July

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- 1 - A. Appendix_for_as8051_Frankenstein_Assembler A.1 Pseudo_Operations A.1.1 Standard_Pseudo_Operation_Mnemonics End END File Inclusion INCL INCLUDE If IF Else ELSE End If ENDI Equate EQU Set SET Org ORG Reserve Memory RESERVE RMB Define Byte Data BYTE DB FCB Define Word Data DW FDB WORD Define String Data FCC STRING Define Character Set Translation CHARSET Define Character Value CHARDEF CHD Use Character Translation CHARUSE A.1.2 Machine_Dependent_Pseudo_Operations A.1.2.1 Define_Word_Data The Define Word Data pseudo- operations generate the byte reversed form for 16 bit constants. The first byte is the low order half, followed by the high order byte. A.2 Instructions A.2.1 Instruction_List Opcode Syntax Selection Criteria ACALL expr ADD A ',' '#' expr ADD A ',' '@' REG R01 ADD A ',' REG R07 ADD A ',' expr ADDC A ',' '#' expr ADDC A ',' '@' REG R01 ADDC A ',' REG R07 ADDC A ',' expr AJMP expr - 2 - Opcode Syntax Selection Criteria ANL A ',' '#' expr ANL A ',' '@' REG R01 ANL A ',' REG R07 ANL A ',' expr ANL C ',' '/' bit ANL C ',' '/' expr ANL C ',' bit ANL C ',' expr ANL expr ',' '#' expr ANL expr ','A CJNE A ',' '#' expr ',' expr CJNE A ',' expr ',' expr CJNE '@' REG ',' '#' expr ',' expr R01 CJNE REG ',' '#' expr ',' expr R07 CLR A CLR C CLR bit CLR expr CPL A CPL C CPL bit CPL expr DA A DEC '@' REG R01 DEC A DEC REG R07 DEC expr DIV AB DJNZ REG ',' expr R07 DJNZ expr ',' expr INC '@' REG R01 INC A INC DPTR INC REG R07 INC expr JB bit ',' expr JB expr ',' expr - 3 - Opcode Syntax Selection Criteria JBC bit ',' expr JBC expr ',' expr JC expr JMP '@' A '+' DPTR JNB bit ',' expr JNB expr ',' expr JNC expr JNZ expr JZ expr LCALL expr LJMP expr MOV '@' REG ',' '#' expr R01 MOV '@' REG ',' A R01 MOV '@' REG ',' expr R01 MOV A ',' '#' expr MOV A ',' '@' REG R01 MOV A ',' REG R07 MOV A ',' expr MOV C ',' bit MOV C ',' expr MOV DPTR ',' '#' expr MOV REG ',' A R07 MOV REG ',' '#' expr R07 MOV REG ',' expr R07 MOV bit ',' C MOV expr ',' '#' expr MOV expr ',' '@' REG R01 MOV expr ',' A MOV expr ',' C MOV expr ',' REG R07 MOV expr ',' expr MOVC A ',' '@' A '+' DPTR MOVC A ',' '@' A '+' PC MOVX '@' DPTR ',' A MOVX '@' REG ',' A R01 - 4 - Opcode Syntax Selection Criteria MOVX A ',' '@' DPTR MOVX A ',' '@' REG R01 MUL AB NOP ORL A ',' '#' expr ORL A ',' '@' REG R01 ORL A ',' REG R07 ORL A ',' expr ORL C ',' '/' bit ORL C ',' '/' expr ORL C ',' bit ORL C ',' expr ORL expr ',' '#' expr ORL expr ',' A POP expr PUSH expr RET RETI RL A RLC A RR A RRC A SETB C SETB bit SETB expr SJMP expr SUBB A ',' '#' expr SUBB A ',' '@' REG R01 SUBB A ',' REG R07 SUBB A ',' expr SWAP A - 5 - Opcode Syntax Selection Criteria XCH A ',' '@' REG R01 XCH A ',' REG R07 XCH A ',' expr XCHD A ',' '@' REG R01 XRL A ',' '#' expr XRL A ',' '@' REG R01 XRL A ',' REG R07 XRL A ',' expr XRL expr ',' '#' expr XRL expr ',' A A.2.2 Selection_Criteria_Keywords R01 Only the reserved symbols R0 and R1 (or r0, r1) are acceptable as the REG operand. R07 All the reserved symbols R0 thru R7 are acceptable as the REG operand. A.2.3 Bit_Operands Bit Addresses can be in two forms. One form is "expression.constant" where expression gives an address for a bit addressable register and constant (in the range of 0 to 7) gives the bit number in the byte. Expression values must be either in the range of 20h to 2fh, or the multiples of 8 between 80h and f8h, and defined in the first pass. The second form is an symbolic expression with value between 0 and 255. The value of the expression is placed in the operand field of the instruction without modification. A.2.4 Apostrophes The apostrophes in the syntax field are a notation used for the parser generator and are not put in the assembler source statement. A.3 Notes A.3.1 Address_Spaces The Four address spaces, Program Memory, Internal Data Memory, Bit Numbers, and External Data Memory are not differentiated in the symbol table. Which address space a symbol refers to is determined by the context of the instruction operands it appears in. - 6 - A.3.2 Reserved_Symbols A.3.2.1 Machine_Dependent_Reserved_Symbols A AB C DPTR PC R0 R1 R2 R3 R4 R5 R6 R7 a ab c dptr pc r0 r1 r2 r3 r4 r5 r6 r7 A.3.2.2 Standard_Reserved_Symbols AND DEFINED EQ GE GT HIGH LE LOW LT MOD NE NOT OR SHL SHR XOR and defined eq ge gt high le low lt mod ne not or shl shr xor CONTENTS A. Appendix for as8051 Frankenstein Assembler........... 1 A.1 Pseudo Operations............................... 1 A.2 Instructions.................................... 1 A.3 Notes........................................... 5 - i -