[A83] Re: Conditional bcall()ing

[A83] Re: Conditional bcall()ing

• To: assembly-83@lists.ticalc.org
• Subject: [A83] Re: Conditional bcall()ing
• From: Peter-Martijn Kuipers <hyper@hysoft-automation.com>
• Date: Sat, 27 Oct 2001 14:05:14 +0200 (CEST)
• In-Reply-To: <5.1.0.14.0.20011027104733.04da31b8@pop.home.se> from "Olle Hedman" at Oct 27, 2001 10:48:47 AM
• Reply-To: assembly-83@lists.ticalc.org

If I remember correctly, jr $+0 jumps to the next instruction.
Checked it by executing
:AsmPrgm 
:1800C9
(jr $+0 \ ret)

it exits, so you only need 3 bytes.

--Peter-Martijn

> At 08:20 2001-10-27, you wrote:
> > > 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...
> 
> Yes, but doesn't it point to the _current_ instruction, beeing executed. 
> that is, before the jr. then you need to jump 2 bytes extra for jr and its 
> argument.
> 
> ///Olle
> 
> 
> 

• [A83] Re: Conditional bcall()ing
• From: Olle Hedman <alh@home.se>

• [A83] Re: Conditional bcall()ing
• From: Olle Hedman <alh@home.se>

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