mode Byte for transput

[Jose E. Marchesi]

Hi Chris.

> I was reading over an earlier conversation and I see two possible
> definitions for Byte in that:
>
> mode Byte = short short int
>
> and
>
> mode Byte = short short bits
>
> I don't know that this was ever finalized; could we decide now?  At least
> in a provisional way?

The Algol 68 int/bits always corresponds to the C int/unsigned-int in
the target.

In most targets this is:

     short short bits  - 8 bits
     short bits        - 16 bits
     bits              - 32 bits
     long bits         - 64 bits
     long long bits    - 64 bits

In avr in 8-bits mode:

     short short bits - 8 bits
     short bits       - 8 bits
     bits             - 8 bits
     long bits        - 16 bits
     long long bits   - 32 bits

In avr in 16-bits mode:

     short short bits - 8 bits
     short bits       - 8 bits
     bits             - 16 bits
     long bits        - 32 bits
     long lonb bits   - 64 bits

So short short bits will always be 8 bits regardles of target, and thats
the mode we wan to alias to Byte.