zx48, a Sinclair ZX Spectrum 48K FPGA implementation

Supports this FPGA boards:

• ZX-Uno board (http://zxuno.speccy.org/)
• ZXDOS and ZXDOS+ board (https://www.antoniovillena.es/store/))
• SiDi (https://manuferhi.com/p/sidi)
• UnAmiga Reloaded (https://github.com/UnAmigaReloaded-fpga)

Implements a standard ZX Spectrum 48K computer and the follwing hardware:

• DivMMC
• Specdrum
• Turbosound
• SA1099 (SiDi and UnAmiga)
• Joystick Kempston
• Tape loading

Keyboard shortcuts

• Spectrum Reset: F12 or Ctrl+Alt+Del (ZX-Uno, ZXDOS, ZXDOS+)
• Spectrum Reset: F6 or Ctrl+Alt+Del (SiDi, UnAmiga)
• FPGA Reset: F11 or Ctrl+Alt+Backspace (ZX-Uno, ZXDOS, ZXDOS+)
• NMI: F5
• Toggle RGB/VGA: scroll lock