|Release Date||16 May 2016|
|Last Modified||20 May 2016|
ASMPATCH is an assembler tool for patching SNES ROMs. It is a self-contained assembler, linker, and patcher all rolled into a single Windows ‘Command Line’ executable. There are no additional files required.
What sets it apart is that it isn’t complicated to use and it can patch ROM files with complex memory mapping schemes (as well as run-of-the-mill schemes.) Full source code is also available.
It supports the 65c816 instruction set (as well as the 65c02 and 6502) using the source code format style of the Apple IIgs. It is based upon the Merlin16+ assembler tool design and full documentation on the Merlin16+ assembler is available online in PDF format.
(This is an alpha release. It has been tested on a few SNES ROMs as of May 16, 2016. While it has not been tested with NES ROMs, I’m not aware of a reason it couldn’t be used with them.)
Direct web links are: