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MPASM™/MPLINK™ PICmicro® MCU Quick Chart
MPASM™ Assembler Usage

MPASM Directive Summary (Con’t)

MPASM Directive Summary
Directive

Directive

Description

Description

Syntax

DATA

Syntax

Create Numeric/
Text Data

data ,
[,,...,]
data ""
[,"",...]

CONTROL DIRECTIVES
CONSTANT

Declare Symbol
Constant

constant [= ,
..., [= ]]

DB

Declare Data of
OneByte

db
[,,...,]

#DEFINE

Define Text
Substitution

#define
[[(,...,)]]

DE

Declare EEPROM
Data

de
[,,...,]

DT

Define Table

dt
[,,...,]

DW

Declare Data of
One Word

dw
[,,...,]

END

End Program Block

end

EQU

Define Assembly
Constant

equ

#INCLUDE

Include Source File

include

ORG

Set Program Origin

org

ENDCEnd CBlock

endc

PROCESSOR

Set Processor
Type

processor


FILL

Specify Memory
Fill Value

fill ,

RADIX

Specify Default
Radix

radix

_ _ IDLOCS

Set ID locations

_ _idlocs

_ _MAXRAM

_ _maxram

SET

Assign Value to
Variable

set

Specify max RAM
adr

_ _MAXROM

Delete a
Substitution Label

#undefine

Specify max ROM
adr

__maxrom

#UNDEFINE

RES

Reserve Memory

res

VARIABLE

Declare Symbol
Variable

variable
[= ,...,]

LISTING
ERROR

CONDITIONAL ASSEMBLY
ELSE

Begin Alternative
Assembly to IF

else

Issue an Error
Message

error ""

ERRORLEVEL

Set Message Level

errorlevel 0|1|2|

LIST

Listing Options

list [[,...,]]

MESSG

User Defined
Message

messg ""

ENDIFEnd Conditional
Assembly

endif

ENDW

End a While Loop

endw

IF

Begin Conditional
ASM Code

if

NOLIST

Turn off Listing
Output

nolist

IFDEF

Execute If Symbol
Defined

ifdef

PAGE

Insert Listing Page
Eject

page

IFNDEF

Execute If Symbol
Not Defined

ifndef

SPACE

Insert Blank
Listing Lines

space []

WHILE

Perform Loop
WhileTrue

while

SUBTITLE

Specify Program
Subtitle

subtitl ""

TITLE

Specify Program
Title

title ""

DATA
_ _BADRAM

Specify invalid
RAM locations

_ _badram

_ _BADROM

Specify invalid
ROM locations

_ _badrom

ENDM

End a Macro
Definition

endm

CBLOCK

Define Block of
Constants

cblock []

EXITM

Exit from a Macro

exitm

EXPAND

expandSet configuration
bits

_ _config OR
_ _config ,
(PIC18 MCU)

Expand Macro
Listing

LOCAL

Declare Local
Macro Variable

local [,]

CONFIG

Set configuration
bits (PIC18 MCU)

config setting=value
[, setting=value]

MACRO

Declare Macro
Definition

macro
[,...,]

DA

Pack Strings in
14-bit Memory

[] da
[, , ..., ]

NOEXPAND

Turn off MacroExpansion

noexpand

_ _CONFIG

MACROS

1

MPASM™/MPLINK™ PICmicro® MCU Quick Chart
MPLINK™ Linker Usage

MPASM Directive Summary (Con’t)
Directive

Description

MPLINK Command Line Options

Syntax

OBJECT FILE DIRECTIVES

Option

ACCESS_OVR

Overlay section in
Access RAM

[] access_ovr
[]

BANKISEL

Select Bank for
indirect

bankisel

BANKSEL

Select RAMbank

CODE

Description

/a hexformat

Specify format of hex output file

/h, /?

Display help screen

/k pathlist

Add directories to linker script search path

banksel

/l pathlist

Add directories to library search path

Executable code
section

[] code []

/m filename

Create map file ‘filename’

/n length

Specify number of lines per listing page

Packeddata in
program memory

[] code_pack
[]

/o filename

Specify output file ‘filename’. Default is a.out.

Declare external
label

extern [ ,]

/q

Quiet mode

/w

GLOBAL

Export defined
label

extern [ .]

Suppress mp2cod.exe - prevent the
generation of a .cod file and a .lst file

/x

IDATA

Initialized data
section

[] idata []

Suppress mp2hex.exe -...