Host introspection: Difference between revisions

=={{header|Z80 Assembly}}==

The Z80's word size is 16-bit, and you'd know this ahead of time simply because there aren't any commands that work with values any larger than that. It's also little-endian, but this can be proven without knowing it in advance using a simple store and load test.

<lang z80>EndianTest:

ld hl,&8000

ld (&C000),hl ;store &8000 into memory.

ld a,(&C000) ;loads the byte at &C000 into A. If the Z80 were big-endian, A would equal &80. But it equals zero.

or a ;still, we need to pretend we don't already know the result and compare A to zero.

jr z,LittleEndian ;handle the case where Z80 is little-endian (which it is, so this branch is always taken.)

;else, do whatever you would do to show that the Z80 is big-endian (it isn't, so execution never reaches here.)</lang>