MAME & Ultimarc / RETROARCH IPAC2&4 Player 2 "up" causes TAB / MAME GUI to show

[mrclean]

I have an IPAC2, As well as an IPAC4 They are coded this way below (in addition to my RetroArch config below). However when I'm using only certain versions of MAME I think it's either 2000 libretro or MAME 2014 libretro on a raspberry Pi. My issue is when I hit "UP" on Player 2 joystick the MAME GUI pops up ! Which should be triggered by TAB...(Tab also triggers it which I obviously want it to). But I don't understand If IPAC is coded to use "R" as up on P2 Joystick how is that triggering the TAB/MENU system on MAME ?! I don't have this issue when using MAME 2003 (.78 Set). I'm using various versions of MAME to support the best game play / emulation. Below is also a portion of my RetroArch config which seems to override take control of the controllers. I have a work around which essentially I can use something other than "R" for Player 2 up, simply I can reassign the key / reflash the IPAC to something else but I think this can be resolved via software / or a config file. Any one care to chime in as to why Player 2 UP which is "R" on my IPAC causes the MAME GUI / TAB to appear on the screen !? Is this a known issues in Libretro MAME where "R" pulls up TAB MAME GUI ?

RetroArch portion of my config (from my 2-player build)
input_player1_a = "alt"
input_player1_b = "ctrl"
input_player1_y = "shift"
input_player1_x = "space"
input_player1_start = "num1"
input_player1_select = "num7"
input_player1_l = "z"
input_player1_r = "x"
input_player1_left = "left"
input_player1_right = "right"
input_player1_up = "up"
input_player1_down = "down"
input_player2_a = "s"
input_player2_b = "a"
input_player2_y = "w"
input_player2_x = "q"
input_player2_start = "num2"
input_player2_select = "num6"
input_player2_l = "i"
input_player2_r = "k"
input_player2_left = "d"
input_player2_right = "g"
input_player2_up = "r"
input_player2_down = "f" 


This is my IPAC Settings:
Label      Key
------      ------
COIN 1      5   
COIN 2      6
COIN 3       7
COIN 4      8
START 1      1   
START 2      2
START 3      3
START 4      4
1 RIGHT      R arrow
1 LEFT      L arrow
1 UP      U arrow
1 DOWN      D arrow
1 SW 1      L-ctrl
1 SW 2      L-alt   
1 SW 3      space   
1 SW 4      L-shift   
1 SW 5      Z   
1 SW 6      X   
1 SW 7      C   
1 SW 8      V   
1 A      P (*Only On IPAC2)
1 B      ENTER (Only On IPAC2)   
START 1      1   
START 2      2
START 3      3
START 4      4
2 RIGHT      G   
2 LEFT      D   
2 UP      R   
2 DOWN      F   
2 SW 1      A   
2 SW 2      S   
2 SW 3      Q   
2 SW 4      W   
2 SW 5      I   
2 SW 6      K   
2 SW 7      J   
2 SW 8      L   
2 A      TAB (*Only on IPAC2)   
2 B      ESC(*Only on IPAC2)
3 RIGHT      L
3 LEFT      J
3 UP      I
3 DOWN      K
3 SW 1      R-ctrl
3 SW 2      R-shift
3 SW 3      ENTER
3 SW 4      O
3 SW 5      F5
3 SW 6      F6
3 SW 7      F7
3 SW 8      F8
4 RIGHT      U
4 LEFT      V
4 UP      Y   
4 DOWN      N
4 SW 1      B
4 SW 2      E
4 SW 3      H
4 SW 4      M
4 SW 5      F9   
4 SW 6      F10
4 SW 7      TAB
4 SW 8      ESC

[bperkins01]

Did you check this in Notepad and with a keyboard?
A couple of times on my build I thought I had an iPac problem and it wasn't.  Try a keyboard and hit 'R' and see if you have the same issue..  w/o the iPac USB plugged in..