VBA-Next - RetroBIOS

Type	libretro
Classification	Frozen snapshots
Source	https://github.com/libretro/vba-next
Upstream	https://github.com/visualboyadvance-m/visualboyadvance-m
Version	SVN
Profiled	2026-03-25
Cores	vba_next
Systems	nintendo-gba

Technical notes

Frozen snapshot of VBA-M circa 2011, optimized for libretro by Squarepusher.

Built-in HLE BIOS (myROM array, src/gba.c:8930) handles all standard SWI calls. No external BIOS file needed for most games.

BIOS loading gated by HAVE_HLE_BIOS (build/Makefile.common:3) and core option vbanext_bios (default: enabled). When enabled, retro_init resolves gba_bios.bin in system_dir (libretro/libretro.c:213-218). CPUInit loads via utilLoad(), validates size == 0x4000, sets useBios = true (src/gba.c:12943-12950). On failure, myROM is memcpy'd as HLE fallback (src/gba.c:12954-12956).

With real BIOS, execution starts at 0x00000000 (BIOS entry point). Without, jumps to 0x08000000 (ROM entry), skipping boot animation (src/gba.c:13134-13151).

Upstream VBA-M CPUInit (src/core/gba/gba.cpp:5137-5165) is functionally identical. No divergences in BIOS handling.

1 files | 0 required, 1 optional | 1 in repo, 0 missing | 1 with HLE fallback

gba_bios.bin optional in repo HLE fallback
GBA BIOS

• System: nintendo-gba
• Size: 16.0 KB
• Validation: size
• Source: libretro/libretro.c:213-218, src/gba.c:12954-12963
• Platforms: batocera, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm
• Optional. HLE replacement handles all standard SWI calls. Real BIOS adds startup logo and may improve edge-case accuracy.

Generated on 2026-09-14T09:03:10Z