Re: Test: the stack

["Marc S. Ressl" <mressl@gmail.com>]

On 18 feb, 23:28, Michael J. Mahon <mjma...@aol.com> wrote:
> Bill Hicks <billwebz...@gmail.com> wrote:
> > On Feb 18, 11:52 am, dog_...@macgui.com (D Finnigan) wrote:
> >> OK, here is the picture:
>
> >>http://macgui.com/gallery/showphoto.php?pic_id43
>
> >> *100.17F
>
> >> 0100- FF FF 02 00 FF FF 02 00
> >> 0108- FF FF 02 00 FF FF 02 02
>
> >> It's an interesting pattern. There's more to it than just those two lines.
>
> >> --
> >> ]DF$
> >> Mac GUI Vault - A source for retro Apple II and
> >> Macintosh computing.http://macgui.com/vault/
> > Why is there a pattern? Is it initialized to that for some reason? And
> > why is your different?
>
> It's the way the DRAMs power up in an Apple when they've been off for a
> while. No great significance.
>
> -michael - NadaNet 3.1 and AppleCrate II:http://home.comcast.net/~mjmahon

Thanks a lot for all the great responses!

Yes, indeed it is something of no importance, except for the tiny
flash of graphic characters you see when starting a computer.

Also, I was interested in what happens in the stack at 0x100, because
of a peculiarity of how the 6502 starts up. And indeed it proved me
wrong, it seems the stack is not initialized at 0x00, but rather 0xff.

Thanks again for all the help,
and with the best wishes,

Marc.-

pd: the Laser and IIGS responses were particularly interesting to me :)