EDITED: so I followed the tutorial (How to configure IR remote control) and the table that works for my Sunvell T95X remote is this:
0x140 KEY_POWER
0x116 KEY_UP
0x11a KEY_DOWN
0x151 KEY_LEFT
0x150 KEY_RIGHT
0x113 KEY_ENTER
0x119 KEY_BACK
0x111 KEY_HOME
0x14c KEY_CONTEXT_MENU
0x14e KEY_1
0x10d KEY_2
0x10c KEY_3
0x14a KEY_4
0x109 KEY_5
0x108 KEY_6
0x146 KEY_7
0x105 KEY_8
0x104 KEY_9
0x101 KEY_0
0x141 KEY_MUTE
0x142 KEY_BACKSPACE
0x118 KEY_VOLUMEUP
0x110 KEY_VOLUMEDOWN
0x100 KEY_PLAYPAUSE
Thank you all for your help!