[A83] Re: Conditional bcall()ing

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Conditional bcall()ing
From: "Emir Sakic" <saka@hotmail.com>
Date: Sat, 27 Oct 2001 19:14:37 +0200
Reply-To: assembly-83@lists.ticalc.org


#define bcall_z(addr) jr nz,$+5 \ rst 28h \ .dw addr

don't be sorry because I am right!

$ points to the place before jr.

jr nz  = 1 byte
branch = 1 byte
rst    = 1 byte
addr   = 2 bytes
----------------
sum    = 5 bytes

If you still don't believe go test it.

>
> > Van: Emir Sakic <saka@hotmail.com>
> >
> > >So always take the opposite of the flag, and jump[-relative] over the
> > >bcall(), a macro would be like this:
> > >
> > >#define bcall_z(addr) jr nz,$+3 \ rst 28 \ .dw addr
> > >
> > >	Henk Poley <><
> >
> > Actually:
> > #define bcall_z(addr) jr nz,$+5 \ rst 28h \ .dw addr
>
>Sorry, but you're wrong:
>
>an RST command is 1 byte, a '.dw' is 2 bytes, 1+2=3...
>
>	Henk Poley <><
>
>


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