my next problem seem to be a way to handle signed operations directly with C operations or if I need to read up on arithmetics and handle them myself, you see this is the first time I'm doing this sort of lowlevel stuff in C.

> The usual way for 68000 is as you say to store unsigned shorts in x86 format and
> xor the address with 1 when reading bytes.
>
> For the 68020 the process is the same but store unsigned longs and xor address
> with 2 when reading words and with 3 when reading bytes.
>
> Unaligned reads aren't that hard, there are only three cases. You just do two
> reads and shift each value, like the real chip does. In terms of emulating an
> Amiga, that is easy.
>
> smf
>