What are the pseudo instructions for PIC series microcontrollers?

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What are the pseudo instructions for PIC series microcontrollers? [Copy link]

When reading the beginning of some PIC microcontroller source programs, you will find some special instruction mnemonics. These mnemonics are different from the mnemonics of the instruction system and have no corresponding opcodes. These special instruction mnemonics are usually called pseudo-instructions.
　　The role of pseudo-instructions in the source program is to make various preparations for completing the assembly program (actually, they are comments for PC assembly). These pseudo-instructions only work during the assembly process. Once the assembly is completed, the mission of the pseudo-instructions is completed.
　　In the assembly program MPASM, there are four types of pseudo-instructions: data pseudo-instructions, list pseudo-instructions, control pseudo-instructions, and macro assembly instructions.
　　Now, we will explain the commonly used pseudo-instructions in the first two categories, and the latter two categories of pseudo-instructions will be explained when they appear in specific programs.
　　(1) ORG storage unit starting address
　　Format: ORG

　　Description: ORG is used to specify the starting address of the source program after the pseudo-instruction, that is, the first address of the assembled target machine code. If there is no address parameter after ORG, the default is 0. If ORG is accompanied by a label, the address parameter is also assigned to the label. In a source program, you can use the ORG pseudo-instruction as many times as needed to locate.
　　Example: ORG 1FFH DELAY
　　　GOTO MAIN MOVLM 2
　　　; ... ...
　　ORG 0 END
　　　　　　　　　　　　　　　　right row to left
　　Description: The pseudo-instruction END at the end of the instruction notifies the assembler MPASM to end the assembly of the source program (?ASM). Even if there are statements behind it, it will not be assembled again. There must be an END pseudo-instruction in a source program, and there can only be one END, and it is placed at the end of the entire program.
　　(2) EQU is to assign values to register f and labels .
　　Format: EQU
　　Description: Assign values to labels or registers. Once a label is assigned by EQU, its value cannot be redefined.
　　Example: label EQU 0x20
　　Note: The 0x in the operand here represents hexadecimal, that is, 0x20 is equivalent to 20H.
　　(3) LIST list selection instruction
　　Format: LIST , ...,
　　Description: Used to set various assembly parameters to control the assembly process, or format the list file. All parameters of this pseudo-instruction can only be completed in one line, and the values of the parameters are set in decimal.
　　Some of the parameters that can be selected by the LIST list selection pseudo-instruction are as follows.
Parameter name Default value Function
f= 1NHX8M; specifies the format of the solid-state programming file (INHX16, INHX32 or INHX8M) 1NHX8M is suitable for inputting the target code into most EPROM programmers.
P= None Set the microcontroller type, such as 16F84
r= HEX Set the radix of the constant number system (such as hex hexadecimal; dec decimal, etc.)
　　Example: LIST f=1NHX8M, r=DEC, P=16F84
　　(4) PROCESSOR
　　Description: Used to select the model of the microcontroller used.
　　(5)INCLUDE includes other external source files
　　Format: INCLUDE "file name"
　　INCLUDE
　　Description: It is used to read the specified file into the source program as part of the source program code until the end of the file is detected, and then restore to the code in the original source program. This pseudo-instruction allows nesting, up to 6 levels of nesting. The file name must be given in double quotes or angle brackets.
　　Example: include "c:\PIC\sysdefs.inc"
　　　　include?