See blog post : http://bitboxconsole.blogspot.fr/2015/05/zx-spectrum-emulator.html

Inspiration from UB spectrum emulator, heavily modified for bitbox.

ZX80 file Loading from UB routines.

(using QWERTY keyboard conventions)

• Left Shift caps shift
• Left Ctrl symbol shift
• Arrows/RShift Kempston Joystick
• Alt+Del Reset
• Alt+AKLMT Load Games ...
• Alt+PgUp/Dn Turbo On/Off

The following modifications have been performed :

• STM32f429 -> stm32f405 (no DMA2D)
• No LCD screen -> bitbox VGA out with no internal RAM
• using bitbox USB (keyboard & joystick) & uSD drivers (future)
• Integration to Bitbox conventions, build process
• Externalization of roms as z80 files

• gamepad
• sound
• SD file game loading with menu
• basic programs load/save ?
• save screenshot to (scr) file
• turbo on / off
• several Keymaps

first screen display, then go to basic.