BASIC FUNCTIONS
SECTION 5.2
5.2.2
Function ARG is used for passing parameters to machine ccxle subroutines.
Syntax
D=ARG(N)
Where Dis a Dummy Variable
N is the number to be passed
Examples P=ARG(10) Passes 10
P=ARG(V) Passes V
Remarks ARG loads the Z80 E and C registers.
VER.V09F
They are loaded with the higher and lower byte portions of
a 16 bit representation of the ARG argument.
For example if V in the example above was 4100 then:
E=16 C=4
NOTE: 16x256+4 = 4100
This function is useful when making CP/M system calls to
set the C register before a call to location 5. See
section 4.8, MACHINE CODE CALLS.
PAGE 5 - 6
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