TODO

- c64/nes:  Reset problem
- nes:      Limit all audio signals to fs/2
- nes:      Castlevania, fix upper lines scroll (timing method used?)
- nes:      Sprite overflow bug
- nes:      Test The Young Indiana Jones Chronicles and Burai Fighter
- 2A03:     Dump of memory mapped registers
- icons:    Fix png2cpp.sh under linux (gnu hexdump problems)
- misc:     Test on macos-x86
- misc:     Unify base machine (common base class for all platforms)
- main:     Refactor configurator using a real gui toolkit (wxWidgets?)
- 6502:     Tests suite: trap12 is failing
- SID:      Filter gain or shape? (ballad/channels dane)
- C1541Fs:  Fastload mode (remove time emulation during load/save operations)
- C1541Fs:  Fix: Open "@S:URIDIUM HIGH/REM": 62 - "FILE NOT FOUND"
- C1541Fs:  Check whether open channels can be re-opened w/o close (Ghosts and Gobblins)
- UI:       Fix disk widget activity when C1541 is in error condition.
- C1541:    D64 support (emulate hardware)
- CBMBUS:   Timeout (to recover from external problems)
- CBMBUS:   Refactor using pullups
- c64:      C64 EasyFlash cartridge: EEPROM support
- c64:      Ughlympics and Bombjack: Start game
- c64:      C64 EasyFlash cartridge: Turrican2 continue game?
- c64:      Zaxxon cartridge: Wrong chargen
- c64:      Ms-Pacman
- misc:     Use fstream::native_handle() (C++26)
- Spectrum: Test SNA format
- Apple2
- BBC Micro
- Daewoo DPC-200 (MSX)
- NEC PC-8001
- Amstrad CPC-464