[A83] Re: Defining custom vars

[A83] Re: Defining custom vars

• To: assembly-83@lists.ticalc.org
• Subject: [A83] Re: Defining custom vars
• From: "Dan Weiss" <dwedit@hotmail.com>
• Date: Tue, 07 May 2002 21:51:55 -0500
• Reply-To: assembly-83@lists.ticalc.org

Yes, they're called Labels.

you define them like this:  (NOT TABBED)

Xpos = saferam2
Ypos = Xpos + 1

Then put them in parenthesis if you want the value at that location:

  ld a,(Xpos)  ;<-- Parentheis!  this means the value at Xpos

and if you want the offset of that label:

  ld hl,Xpos  ;<-- No parenthesis, hl = the address of xpos

when you have the offset of a label, you can move the offset around and get 
the bytes next to it.

  ld hl,Xpos
  inc hl      ;hl got moved up 1, so it now points one byte ahead.
  ld a,(hl)   ;a now contains the byte ahead of Xpos

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• [A83] Re: Defining custom vars
• From: Matt McDole <simucal@socket.net>

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