- Added an integrated firmware updater for GBxCart v1.3 devices which includes the latest official firmware version at time of FlashGBX release; also supports external firmware files
- Added support for the new GBxCart RW v1.4 hardware
- Created a custom high compatibility firmware for GBxCart v1.3 and v1.4 devices, completely written from scratch
- Version L1 for GBxCart RW v1.3
- Works with all officially released Game Boy and Game Boy Advance cartridges including those with rare mappers, except cartridges that use memory cards and other external peripherals
- Supported mappers: MBC1, MBC2, MBC3, MBC30, MBC5, MBC6, MBC7, MBC1M, MMM01, GBD (Game Boy Camera), G-MMC1 (GB-Memory), M161, HuC-1, HuC-3, TAMA5, DACS, 3D Memory (GBA Video)
- Enables support for a few more reproduction and flash cartridges including:
- 4050M0Y0Q0-39VF512 with 4050M0Y0Q0
- Development AGB Cartridge 128M Flash S, E201850
- Development AGB Cartridge 256M Flash S, E201868
- Flash2Advance 256M (non-Ultra)
- Faster transfer rates for most operations
- Currently only supported by FlashGBX, not supported by official interface software
- Available through the integrated Firmware Updater
- It’s possible to return to the official firmware at any time using FlashGBX or the official firmware updater
- Version L1 for GBxCart v1.4
- Same as above but already integrated into the official firmware of GBxCart RW v1.4
- Added support for official cartridges with the MBC6 memory bank controller including its flash memory; tested with “Net de Get: Minigame 100” (CGB-BMVJ-JPN) *(thanks to endrift’s research at [gbdev](https://gbdev.gg8.se/forums/viewtopic.php?id=544))* (requires GBxCart RW firmware version L1+)
- Previously preliminarily added mapper support including for MBC7 and GBA Video cartridges is now working (requires GBxCart RW firmware version L1+)
- Added support for writing compilation ROMs to Nintendo Power GB-Memory Cartridges (DMG-MMSA-JPN); requires a .map file in the same directory as the ROM file; all this can be generated using orangeglo’s [GBNP ROM builder website](https://orangeglo.github.io/gbnp/index.html)
- Confirmed support for GB-M968 with 29LV160DB *(thanks bbsan)*
- Added support for ROM backup as well as save data backup and restore for 8M FLASH DACS cartridges
- Confirmed support for SD007_TSOP_29LV017D with L017D70VC *(thanks marv17)*
- Added support for 100BS6600_48BALL_V4 with 6600M0U0BE (the “369IN1” cartridge) *(thanks to BennVenn’s research on Discord)*
- Removed broken support for saving and restoring RTC registers of official TAMA5 cartridges inside the save file as it became clear that the year value was not correctly written; more research needed
- Support for optionally saving RTC registers of official Game Boy Advance cartridges inside the save file was added, however currently no emulator has support for synchronizing the clock
- Added an option for updating the RTC values (like the clock was running in the background) when restoring a save data file that has these values stored inside