Re: A83: Question About Storing Words (.dw)
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Re: A83: Question About Storing Words (.dw)
the homonerdicus wrote:
>
> And how do you define a word using the
> #DEFINE xxx xxx
> statement ?
The # directives are taken straight outta C - this means #define,
#include, and whatever else you can do (I haven't tried, but I'll bet
there's also #if, #else, #undef, and a whole slew of other directives).
Now if TASM includes a full pre-processor (the doodad that handles all
the #-lines), then the #define directive is probably much more powerful
than you would realize.
It's basically a macro replacement system, with two forms:
#define name <replacement text>
This replaces instances of "name" with the replacement text, which can
be anything really. More interesting, though, is this form:
#define name(arg1[,arg2[,...]]) <replacement text>
This replaces instances of "name" with the replacement text, but with
parameter substitution. For example
#define WHATS_AT(p) (p)
would replace calls to WHATS_AT like so:
WHATS_AT (45h) becomes (45h)
WHATS_AT (hl) becomes (hl)
and so on. This could help make code a bit more readable, less complex,
whatever. Use at your own risk.
--
John Kugelman. jkugelman@mgfairfax.rr.com
I believe we can change anything.
I believe in my dream.
- Joe Satriani
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