Hello I am new here and hope I selected the right place for my question:
What about the bootleg PCBs of IREM games how do they fit into the picture?
If I understood it right they played a major role in understanding the IREM boards especially the custom chips.
I just bought one of Hammerin' Harry got it for 70€ (+30€ international shipping) not exactly cheap but not bad I think for a supposedly running board.
I attached the pictures from eBay (did not receive it jet).
This board is M84 based to my understanding is that right?
I had a look to the mame ROMs of my board hharryb and hharryu (M84) the main CPU ROMs 2x 128k seem to be different so I tried to exchange this two ROMs in the ZIP file with the ones from the M84 version and run mame from command line to get past the CRC check. And surprisingly the game started (only played 1-2 min). Would that mean the bootleg runs with the original ROM set?
This is my first Arcade PCB so I just started with that. And I am sorry if I asked questions that are already answered multiple times please give me a pointer where.
I have seen pictures of a board that looks like mine but modded to run R-Type II that is actually what I want to do with this board mod it to run R-Type II ROMs.
I have seen there is a project in progress by
@Hammy M84 Conversions.
How high is the chance that this conversion roms will run as well? And if not what would be need to make them work.
I am aware the layout is completely different but starting form schematics I should be able to create a PCB layout that fits to the different ROM socket location.
I found the schematics of the M72 but not for M84 or my bootleg board, does anyone have them and is willing to share?
Thank you very much.
Please ignore my bad spelling and bad grammar I am from Germany and tried to write this without the help of translation tools.