Re: A86: on interrupt

To: assembly-86@lists.ticalc.org
Subject: Re: A86: on interrupt
From: Brian Smith <subby@pcisys.net>
Date: Mon, 30 Mar 1998 18:09:23 -0700
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <199803301643.SAA17017@factorix.sdv.fr> <19980330.170317.13102.1.the_laser@juno.com>
Reply-To: assembly-86@lists.ticalc.org


Why cant you make a program that will run a basic program on startup?
someone suggested having a basic program run when the calc was turned on,
kind of like a autoexec.bat file, and Kirk Meyer was going to make a
program to do this; but I emailed him about it a couple weeks ago and he
said that you can't run a basic program on startup.

Andy S Johnson wrote:

> Do this:
>
> _USER EQU $d48f
> _BIT EQU 3
> install:
>    res _BIT,(iy+$23) ;turn user routine off so it won't get called by
>                      ;accident before we're ready
>    ld hl,user        ;copy prog to user buffer
>    ld de,_USER+1
>    ld bc,200
>    ldir
>    ld a,(_USER+1)    ;set up checksum byte
>    ld hl,_USER+($28*1)
>    add a,(hl)
>    ld hl,_USER+($28*2)
>    add a,(hl)
>    ld hl,_USER+($28*3)
>    add a,(hl)
>    ld hl,_USER+($28*4)
>    add a,(hl)
>    ld hl,_USER+($28*5)
>    add a,(hl)
>    ld (_USER),a
>    set _BIT,(iy+$23)  ;turn it on
>    ret
> user:
>    push af
>    push bc
>    push de
>    push hl
> ;your program goes here
>    pop hl
>    pop de
>    pop bc
>    pop af
>    ret
>
> ---
> Andy Johnson
> "Change is inevitable...
>      except from vending machines"
>
> On Mon, 30 Mar 1998 18:40:29 +0200 Scalp <Scalp@bigfoot.com> writes:
> >
> >can someone explain me how does the on interrupt work
> >I think I can load my prog in user memory and set some flag, but I
> >don't
> >know how...
> >
> >Thanx
> >Nicolas
> >
> >
>

References:

A86: on interrupt

From: Scalp <Scalp@bigfoot.com>

Re: A86: on interrupt

From: the_laser@juno.com (Andy S Johnson)