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.Dd 26 February, 2024
.Dt U8ASM 1
.Os Ahoy 1.0.0
.Sh NAME
.Nm c8asm
.Nd assemble CHIP-8 binaries
.Sh SYNOPSIS
.Nm
.Op Ar
.Nm
.Fl h
.Sh DESCRIPTION
The
.Nm
utility reads
.Xr c8asm 5
source code files provided as command-line arguments and writes the
corresponding binary to the standard output.
If no command-line arguments are provided or the special
.Sq \-
filename is given,
input is read from the standard input.
.Pp
The assembler is extremely barebones, with no notion of a preprocessor.
If metaprogramming is desired you might consider using a macro-processor
such as
.Xr m4 1
or
.Xr cpp 1 .
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl h , Fl Fl help
Display help information by opening this manual page.
.El
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
Assemble a binary:
.Pp
.Dl $ c8asm celeste.s >celeste.bin
.Pp
Preprocess source files using the
.Xr m4 1
macro processor and then assemble them:
.Pp
.Dl $ m4 setup.s main-loop.s | c8asm >dragster.bin
.Pp
In the above example, local labels will end up being global to the entire
program as a result of
.Ic m4
concatenating the files.
An alternative solution using process substitution
.Pq if your shell supports it
is as follows:
.Pp
.Dl c8asm <(setup.s) <(main-loop.s) >dragster.bin
.Sh SEE ALSO
.Xr ahoy 1 ,
.Xr c8dump 1 ,
.Xr cpp 1 ,
.Xr m4 1 ,
.Xr c8asm 5
.Sh AUTHORS
.An Thomas Voss Aq Mt mail@thomasvoss.com
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