Emulator Cheats

This was fixed after release. Get https://raw.githubusercontent.com/mamed ... at_xml.lua and put it in your plugins/cheat directory.

Sega cd rom cheats don't make sense. I don't know the old cheat format but I suspect the two latter ones are ram cheats in the sega cd address space, maybe use segacd:segacd_68k

Interesting. You could write a script for the lua plugin that would load the hex patches directly but the result would only be usable with the plugin, otherwise there isn't any existing mame feature to convert intel hex files to xml cheats.

As far as I know there's nothing like that anywhere. I'd like to know what you are trying to do though because I'm not sure what kind of cheats you could get from a hex object file.

Heihachi_73 wrote: ↑Fri Sep 11, 2020 10:20 pm MAME has a built-in autofire menu which becomes available when cheats are enabled,

Was removed. You have to use "-plugin autofire" and configure it in the "Plugin options" menu.

For now I made it a -verbose warning.

Is it possible to change the way it works so that it looks for a match using the 32K block size first (58ef,d8ef,158ef,1d8ef etc) and then falls back to a 8K block size (18ef, 38ef, 58ef, 78ef etc) if it can't find a compare value match on the 32k block size. Sure, this isn't hard. What to do with ...

[{ "script":{ "on":"maincpu.bpset(0x470e, function() cpup:write_u8(0xff84b6, 2) cpup:write_u8(0xff84b8, 1) end)" "off":"" }, "desc":"P1 Infinite throw range", "space":{ "cpup":{ "type":"program&...

The lua cheat engine supports breakpoints (https://github.com/mamedev/mame/blob/b29288964f074dd08d47c08c35463c2a4a1186dd/plugins/cheat/init.lua#L63 https://github.com/mamedev/mame/blob/b29288964f074dd08d47c08c35463c2a4a1186dd/plugins/cheat/init.lua#L295) with 2 caveats 1. the debugger must be enable...

This isn't possible in a general way. It is potentially possible for all the software on a particular hardware platform in lua but not with the cheat engine or finder.

Look at the dummy plugin, https://github.com/mamedev/mame/blob/ma ... y/init.lua , to see how to create a menu then the patch above to see if the key press event is a unicode character.

Next version you'll be able to add a popup menu option to enter the player names (https://github.com/mamedev/mame/commit/ ... e4d54a40bb).

[{ "desc": "Set clock to current time", "space": { "cpu": { "tag": ":maincpu", "type": "data" } }, "script": { "on": "local lt = os.date('*t') cpu:write_u8(16, lt.min % 10) cpu:write_u8(17, lt.m...

Without the hack/modification it doesn't write anything at all be it json, xml or simple (written == false and the Unable to write file message pops up). It doesn't create the subdir. If you make a a800_flop directory under cheat they should be created there. I'll have to fix that sometime. I appre...

The json cheat format should always be written because it supports everything. Is this for the simple format as the xml format can't work with ram device cheats?

I've been using the modified lua for about a month and it all works really well (it stopped the silly errors I kept making). I just noticed the latest change to init.lua and figured it might be worthwhile on getting some or all of the changes added to the official - so that I don't have to manually...

Pugsy wrote: ↑Sat Dec 29, 2018 1:39 am <!-- bp 4dc98,1,{pc=4dca0;g} <==use in debugger, this will give you Invincibility against ship collisions - how to poke in cheat engine? -->

That is in the ":bios" rom region at the same address. Just fill 4dc98-4dca0 with 0xea which is the 6502 NOP instruction.

It not a feature or a bug it's really just an artifact of the way it works. The values to save are generated when the search is done and if you want to save in a different format you have to rerun the search (you can use the saved data so that doesn't need to be recreated).

8808F3E8 can be edited in the memory viewer, whilst 808F3E8 just shows **** and cannot be edited. Yet wp 808F3E8,1,w gets hit and wp 8808F3E8,1,w doesn't. Watchpoints only trigger on physical addresses because the translation occurs in the cpu device before it access is matched and translating the ...

BTW, I've just noticed in the proper init.lua when you save a 32 bit value, it's ok in the JSON file but in cheat.simple it comes through as nil rather than d, and in the xml it comes through as ppnil rather than ppd (or pd, as pp==p). Fixed at https://github.com/mamedev/mame/commit/48f61988db4e901...