ROMWak

Original program by Jeff Kurtz, ported to ANSI C by freem, with additions from ozzyyzzo

Tested and confirmed working on these platforms and compilers:

• Windows x32 (Microsoft 32-bit C/C++ Optimizing Compiler Version 15.00.30729.01 for 80x86)
• Windows x64 (tcc 0.9.26)
• Windows x64 (gcc (rev5, Built by MinGW-W64 project) 4.8.1 on Windows 7 x64)
• Linux x64 (gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2 on Linux 3.13.0-24 x86_64)
• Linux PowerPC (gcc (Debian 4.6.3-14) 4.6.3 on Linux 3.2.0-4 powerpc)
• OpenPandora/armv7l (arm-angstrom-linux-gnueabi-gcc (GCC) 4.3.3 on openpandora 3.2.53)

Usage

ROMWak is a program whose parameters change depending on what option you pass in.

The base command is romwak , where the options are:

• /b - Split file into two files, alternating bytes into separate files.
• /c - Concatenate two files.
• /d - Darksoft concatenate two files. (C roms)
• /f - Flip low/high bytes of a file.
• /h - Split file in half (two files).
• /i - Generate rom information (size,crc) (as a text file).
• /m - Byte merge two files.
• /q - Byte merge four files.
• /s - Swap top and bottom halves of a file.
• /u - Byte update two files (with size).
• /w - Split file into two files, alternating words into output files.
• /p - Pad file to [psize] in K with [pbyte] value (0-255).

The program also supports shorthand -params (e.g. '-b', '-p', and so on).

Split File in Two, Alternating Bytes (/b)

romwak /b <infile> <outfile1> <outfile2>
Splits the specified input file into two files by words (two bytes).

Concatenate two files (/c)

romwak /c <infile1> <infile2> <outfile> Concatenates the contents of <infile1> and <infile2> into <outfile>.

Concatenate two C rom files (required for Darksoft flashcart) (/d)

romwak /d <infile1> <infile2> <outfile> Concatenates the contents of <infile1> and <infile2> into <outfile>.

Flip High/Low Bytes (/f)

romwak /f <infile> [<outfile>]
Flips the high and low bytes of the specified file.

<outfile> is optional; if omitted, the file will be swapped in place.

Split File in Half (/h)

romwak /h <infile> <outfile1> <outfile2>
Splits the input file in half into two files (outfile1 and outfile2).

Split File in Half (/i)

`romwak /i Rom information as a text file (size,crc32)

Byte Merge Two Files (/m)

romwak /m <infile1> <infile2> <outfile>
Merges the bytes of infile1 and infile2 to create outfile.

The byte of infile1 is written, then the byte of infile2 is written; repeat for the entire length of the file.

Byte Merge Four Files (/q)

romwak /m <infile1> <infile2> <infile3> <infile4> <outfile>
Merges the bytes of infile1, infile2, infile3, and infile4 to create outfile.

Swap Top and Bottom Halves of File (/s)

romwak /s <infile> [<outfile>]
Swaps the top and bottom halves of the file.

This works pretty awkwardly with odd length files (one byte will be missing).

<outfile> is optional; if omitted, the file will be swapped in place.

Byte Update Two Files (/u)

romwak /u <infile1> <infile2> <outfile> <update size>
Updates some bytes of infile2 with infile1 to create outfile.

Split File Two, Alternating Words (/w)

romwak /w <infile> <outfile1> <outfile2>
Splits the input file into two files by words (two bytes).

Pad file (/p)

romwak /p <infile> <outfile> <padsize> <padbyte>
Pads the input file to Kilobytes with the specified byte.

• <outfile> is currently not optional. This may change in a future release.
• <padsize> is multiplied by 1024, so for 64KB, enter 64 here, not 65535.
• <padbyte> values are currently only accepted as decimal (0-255).

TODO

• More error checking.
• empty filenames, especially for output files.
• Alternate command syntax (--pad, --merge, --split)
• Other functionality not available in original ROMWak?