Echelon Neuron - Manual (Page 89)

CALLF (Call Far)
The CALLF instruction calls a function at the specified absolute address. The
CALLF instruction uses the absolute addressing mode. The address expression
can resolve at link time to any value within the 64 KB address space.
Recommendation: For calls to addresses in the lower 8 KB of the address
space, use the near-address CALL instruction. For calls to nearby functions, use
the CALLR instruction.
The CALLF instruction applies to Series 3100, 5000, and 6000 devices.
Syntax:
The CALLF instruction requires a single operand to specify the far address:
CALLF address
Table 24 describes the attributes of the CALLF instruction.
Table 24. CALLF Instruction
Instruction Hexadecimal
Opcode
Instruction
Size (Bytes)
CPU Cycles
Required
Affect on
Carry Flag
CALLF 77 3 7 None
Example:
The following example calls a function named %PTRINC. This example assumes
that the called function resides at a high memory address.
callf %PTRINC ; calculate next ptr bytes
...
%PTRINC APEXP ; function body
...
ret ; return to caller
Neuron Assembly Language Reference 79