2019 Michael Moffitt mikejmoffitt@gmail.com
This patch adds a Free Play option to the game's configuration screen, replacing the 3 coins / 1 play option that is rarely used in a home or presentation envrionment.
Apply the IPS patch to a dump of the ROM at U29, and burn the patched file to a 27C4096 or compatible ROM.
This patch uses The Macro Assembler AS as an assembler, and incbins original game program as a binary base. My own tool, bsplit, is used to do simple ROM split, exchange, and interleave operations, and is available from https://github.com/mikejmoffitt/romtools.