VisualBoyAdvance2 SVN r303 is released. gbxemu was originally a minimal version of VisualBoyAdvance with only the GBA core and the SDL interface. It was more like an experiment.

VisualBoyAdvance2 SVN Changelog:
r300
correctly emulate access to unused ROM memory without wasting 32 MiB of user's RAM.
The BIOS seems to make use of this for some reason:
read16 from BFFFFE0
by
// LDRH Rd, [Rs, Rn]
static INSN_REGPARM void thumb5A(u32 opcode)
opcode = 5B43
PC ~= B92
r301
add framework for emulating cartridge GPIO devices
r302
fix issue 1 (case sensitive include file P/port.h)
r303
I found a nicer data sheet for the RTC chip directly on the Seiko site.

Download: VisualBoyAdvance2 SVN r303
Source:Here