Add emulation for twilighte board

[jedeoric]

This PR contains the emulation of the 64 banks availables on the board (32 on a EEPROM, 32 on a Static ram).

Please note that :

• eeprom programmation is missing in this emulation
• joysticks emulation is missing too (but it's the same than telestrat's one : work in progress)
• On the hardware, there is a battery which save all static RAM, the emulation is not in this PR too.

The emulation handle hooks on theses I/O adress :

• $320 to $32F (second via)
• $342 and $343 twilighte board control registers.

Rom are updated (kernel and shell v2020.4). Basic rom which handles tape file loading on sdcard or usbdrive is not provided because it's basic11 modified. But i can push it easily if repository need it.

More information : http://orix.oric.org/twilighte-board-v0-6-user-manual/

[jedeoric]

Hello,

I can merge this PR, but i don't know if someone did have a look to this code.

I don't like to merge a PR when i am not alone in a project. But i can.

Let me know if i can merge. Anyway, i will merge it the 4th december.

Thanks