@seedyeh said in Older Ipac 2 button mapping question...:
The ipac keystrokes are the ipac default ones. I am unable to update the firmware on this Ipac (confirmed by Andy over at Ultimarc).
Providing the details listed here avoid later querstions, which most of the time will be needed without it.
I-Pac pre-2004 Era? I am just in possesion of a 2015+ one and don't know what defaults are used on the older ones. Though it ain't part of the problem: you can reconfigure/reprogram the keystrokes send by the I-Pac by using the legacy application for it, or?
What Mame Cores have you tried? As the I-Pac is treated as a KBD here, there may be conflicts between the keyboard input recognized by mame and the additional retropad input send to it (for some cores that may be disabled/configured in the rgui, so that they either see the keyboard or the retropad input, for others (or in addition to that) it may be needed to edit the mame inifile to react only on either one of those signals).