2016-12-30 01:32:50 +00:00
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.Dd December 29, 2016
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.Dt WDC816AS 1
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.Os
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.Sh NAME
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.Nm wdc816as ,
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.Nm wdc02as
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.Nd WDC assembler
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.Sh SYNOPSIS
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.Nm
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.Op Fl GSL1
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.Op Fl I Ar path
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.Op Fl D Ar symbol Ns Op = Ns Ar value
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.Op Fl O Ar outfile
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.Ar sourcefile
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.Sh DESCRIPTION
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The WDC macro assembler,
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.Nm ,
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provides all the tools and facilities to do professional assembly language
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program development.
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.Sh OPTIONS
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.Bl -tag -width indent
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.It Fl 1
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Version 1.0 of the assembler used slightly different control characters. In
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particular, the macro concatenation character
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.Ql |
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was changed to
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.Ql @ ,
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the bit-wise inclusive OR character
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.Ql ^
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was changed to
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.Ql | ,
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and the bit-wise exclusive OR character
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.Ql ^
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was added. This option changes the characters back to the 1.0 versions
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for compatibility.
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.It Fl D
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This option is used to define an absolute symbol at run time. The symbol
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can then be used in conditional statements to change the code generated.
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The symbol can be followed with an equal sign and an absolute decimal
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value. If no value is specified, then the symbol is given the value one.
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For example the following command line:
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.Pp
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.Dl Nm Fl D Ns Ar COUNT=3 Fl D Ns Ar DEBUG Ar FILE.ASM
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.Pp
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will set the absolute symbol COUNT to the value 3 and the symbol DEBUG to
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the value 1. Specifying these options is equivalent to the following
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statements appearing at the beginning of the source file:
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.Pp
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.Bd -literal -offset indent
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COUNT GEQU 3
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DEBUG GEQU 1
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.Ed
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.It Fl G
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The assembler and linker can now produce source level debugging information
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for programs. When this option is specified, the assembler will generate
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special object file records which indicate the number of bytes generated
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for each source line in the file. Information is also generated to
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determine the source file containing the source line. This option will
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increase the size of object modules generated by the assembler. The
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.Li INCDEBUG
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directive can be used to control the generation of source information
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for included files. The
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.Fl G
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option creates the
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.Pa .bin
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file used with the WDC Debugger
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.Nm ( WDCDB.EXE )
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and the
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.Pa WDCDB.INI
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files.
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.It Fl I
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When the assembler encounters an
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.Li INCLUDE
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or
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.Li APPEND
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directive, the assembler looks in specific directories in a specific
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order for the named file. First, the current directory is checked. Next,
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any directories that have been specified using the
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.Fl I
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option will be searched. Finally, if an environment variable called
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.Ev WDC_INC_65816
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or
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.Ev WDC_INC_6502
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has been defined, then any directories specified in that variable
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will be searched.
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.Pp
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For example, if one of the following lines is in the
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.Pa AUTOEXEC.BAT
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file:
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.Pp
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.Bd -literal -offset indent
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2016-12-30 20:17:22 +00:00
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SET WDC_INC_65816=C:\eWDC\eINCLUDE;C:\eWDC\eMACROS
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SET WDC_INC_6502=C:\eWDC\eINCLUDE;C:\eWDC\eMACROS
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2016-12-30 01:32:50 +00:00
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.Ed
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.Pp
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then, the command:
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.Pp
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2016-12-30 20:17:22 +00:00
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.Dl Nm Fl I Ar C:\eMYINC Ar PROG
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2016-12-30 01:32:50 +00:00
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.Pp
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will assemble the file
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.Ar PROG.ASM .
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If the file contains any
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.Li INCLUDE
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or
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.Li APPEND
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directives, then the assembler will look for the specified file in this order:
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.Pp
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.Bd -literal -offset indent
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current directory
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2016-12-30 20:17:22 +00:00
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C:\eMYINC
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C:\eWDC\eINCLUDE
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C:\eWDC\eMACROS
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2016-12-30 01:32:50 +00:00
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.Ed
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.It Fl K
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This option causes the path name specifying the name of the listing file to
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be placed in the reserved word
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2016-12-30 20:17:22 +00:00
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.Dv __FILE__ .
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2016-12-30 01:32:50 +00:00
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.It Fl L
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This option instructs the assembler to generate a listing file that will
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have the same root name as the output name and an extension of
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.Pa .LST .
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The format and output control of the listing file are controlled by
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assembler directives within the source file.
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.It Fl O
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This option is used to specify the name of the output file. Normally, the
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output file has the same root name as the source file, and the extension is
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changed to
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.Pa .OBJ .
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For example, the command:
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.Pp
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.Dl Nm Ar MYPROG.ASM
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.Pp
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will generate an output file called
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.Ar MYPROG.OBJ .
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If the
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.Fl O
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option is used, the output file name can be specified directly. For example:
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.Pp
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.Dl Nm Fl O Ar JUNK.REL Ar MYPROG.ASM
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.Pp
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will place the same output into a file called
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.Ar JUNK.REL .
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.It Fl S
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Normally, labels that aren't declared global are not placed in the object
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module since the assembler resolves all references to them. If the
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.Fl S
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option is specified, the symbols are included in the object file so that
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the linker may pass them on to a symbol file that can be used when
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debugging.
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.It Fl V
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This is the Verbose option. This option displays the amount of
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RAM needed to assemble the program.
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.It Fl W
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This option causes a change in the default page width to 132, creating
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a wide listing.
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.El
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.Sh ENVIRONMENT
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The following environment variables affect the execution of
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.Nm :
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.Bl -tag -width indent
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.It Ev WDC_INC_65816 , WDC_INC_6502
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A semi-colon separated list of directories to search if an
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input file cannot be found in the current directory or in any
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directories specified via the
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.Fl I
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flag.
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.El
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.Sh SEE ALSO
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.\" .Xr wdc02as 1 ,
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.Xr wdc02cc 1 ,
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.Xr wdc02op 1 ,
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.\" .Xr wdc816as 1 ,
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.Xr wdc816cc 1 ,
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.Xr wdc816op 1 ,
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.Xr wdcdb 1 ,
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.Xr wdcln 1 ,
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.Xr wdclib 1 ,
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.Xr wdcobj 1 ,
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.Xr wdcsym 1
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