ESXDOS on Mike Sterlings Spectrum core on MIST board

I have modified Mike Stirlings ZX spectrum core
http://www.mike-stirling.com/retro-fpga … n-an-fpga/

to implement a DIVMMC instead of ZXMMC. The resulting setup runs msxdos just nicely:
https://www.youtube.com/watch?v=w2KloBbW6Qc

The board being used is the MiST board and the modified source code is available at:
https://code.google.com/p/mist-board/

Thanks for the great esxdos.

I have just once tiny feature request: Can you make the NMI menu usable via a kempston joystick? I mapped the NMI button to the fourth fire button of the USB gamepads i use. If the menu itself would also be joystick usable then the whole setup could be used with nothing but the joystick.