Another update of PCE Advance (PC Engine / Turbo Grafix 16 emulator for Gameboy Advance) is out. Changes:

V5.4 – 2004-01-11 (FluBBa)* Fixed LSR from zeropage,x (Gunhed(J)/Blazing Lazers(U)).* Fixed multibooting from multibooted GBA.

http://hem.passagen.se/flubba/gba.html