Re: A86: calc-Off

To: assembly-86@lists.ticalc.org
Subject: Re: A86: calc-Off
From: UndrWareTI <UndrWareTI@aol.com>
Date: Tue, 16 Dec 1997 09:50:16 EST
Organization: AOL (http://www.aol.com)
Reply-To: assembly-86@lists.ticalc.org


In a message dated 97-12-16 07:39:16 EST, you write:

> I'm pretty sure you'd have to install an interrupt routine that would
>  restart your program...I can't think of any other way you could do it. I
>  think an interrupt routine something like this should work:
>  
>     bit onRunning,(iy+onflags)
>     ret z
>  	;I'm not sure exactly how to use _exec_assembly, but use it here to
>  	;restart your program - you could pass it some value that would let
>  	;it know where to pick up.
>     res 2,(iy+35)	;uninstall interrupt
>     ret
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    I just figured it out last night after I sent the message.  It's really
not too complicated.

.org _asm_exec_ram

        ld a,1
        out (3),a
        halt                                <- ; these next two lines are all
that you really need 
        res onInterrupt,(iy+onflags)<-; in order to start  when its turned
back on.  I just
        ld hl,30                               ; made it display something so
I knew it worked.
        ld (_penCol),hl
        ld hl,27
        ld (_penRow),hl
        ld hl,Str0
        call _vputs
        call _getkey
        ret
Str0:
        .db "It Works",0