Re: [stella] New student of Atari programming

Subject: Re: [stella] New student of Atari programming
From: Christopher Tumber <christophertumber@xxxxxxxxxx>
Date: Wed, 15 Jan 2003 17:57:02 -0500
> decided to try to learn Atari programming, since all the resorces were there. I need a little help, and later a lot of help.


> adc #<zero
> adc #>zero
>what does it all mean?? - some kind of adressing mode
>or assembler directive

It's an assembler directive #< is the low byte of a word (usually an address) while #> is the high byte.

To put in it simple context:

  lda #<address
  sta $80
  lda #>address
  sta $81
  jsr ($81)

  ;Subroutine Here

>and what the diff.
> adc #zero  or adc zero

Using # is a constant, your second example is a variable

  zero equ $80

  lda #$10
  sta $80

  ldx #zero
  ldy zero



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