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How to use LJMP with variable address?

Ted Dubroff

I have a 16-bit address in the A register. I need to make a long jump
to this address, however it seems there is no way to do this with
assembly code. By looking at some assembly produced by Keil, when
they want to do this type of jump then end up doing:

LJMP    ?C?ICALL
Which registers do I load up with my address so that the jump to ?C?ICALL succeeds?

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