Re: A89: Re: how to test 2 keys at once? and another question.

Re: A89: Re: how to test 2 keys at once? and another question.

• To: <assembly-89@lists.ticalc.org>
• Subject: Re: A89: Re: how to test 2 keys at once? and another question.
• From: "Scott Noveck" <noveck@pluto.njcc.com>
• Date: Tue, 25 Apr 2000 18:18:53 -0400
• References: <20000425201346.C98EEA4029@towerguard.edu.sollentuna.se>
• Reply-To: assembly-89@lists.ticalc.org

> Use a `set if condition' instruction:
>
> cmp.w whatever,whatever
> seq d0 ; set d0.b to $FF if equal, $00 otherwise
> ext.w d0 ; extend to word: d0.w = $FFFF or $0000
> sub.w d0,x ; add $0001 (=sub $FFFF) or $0000 (=sub $0000)
>
> Of course there are `sne', `sgt', `sle', `shi', `slo', etc ... too.

wow, I like that code so much I just had to write in and say so - I've
always wondered what makes some of those opcodes useful, but how does this
compare speed wise?

    -Scott

• Re: A89: Re: how to test 2 keys at once? and another question.
• From: Johan <johei804@student.liu.se>

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