Following in the footsteps of the latest MAME update, MameUI v.123.6, the Windows GUI port of MAME v.123u6, is now available. The same advice I gave about the latest build of MAME applies to this version of MameUI as well.
As you may or may not already know, MameUI was previously known as MAME32. The emulator's name has been changed as it is now available in both 32 and 64 bit versions (as MameUI32 and MameUI64 respectively). Please be sure to download the correct version for your CPU.
- MameUI – Official website
NYLatenite's Gamer's Paradise 
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