> Afaik the Z380 uses special instructions (Decoder Directives) to indicate
> which ranges are to be used. They all start with DDIR.
But JR is an exception. There are different opcodes for 8 bit JR and for
16 bit JR.
> And which to
> 'compile' by default depends on the mode the Z380 is currently on (in
> extended memory mode 24-bit JR's and 32-bit JP's are default, if I'm not
> mistaking).
Are you sure? I did not read anything about this in the Z380 manual. The
use of 8 or 16 bit JRs depends on the opcode used. And the use of 16, 24
or 32 bit JPs depends on the preceding DDIR decoder directive. But of
course, don't try a 24 or 32 bit JP in native mode because only the low
16 bit of the jump address will be used, and the rest will be ignored.
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