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XTHL exchanges HL register with the content of the stack.
XTHL followed by RET allows to return to an other address than the one which was previously pushed by a CALL.
Eg.:
...
CALL FOOBAR
...
FOOBAR
...
LXI, H @@@@
XTHL
RET ;return to @@@@, not after the 'call'
Alain FOUERE 22april2009
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∙ 15y ago
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