Re: 65c02 in Apple][

[mjmahon@aol.com (Michael J. Mahon)]

Bill Garber wrote:

>"Michael J. Mahon" <mjmahon@aol.com> wrote in message
>20040520122305.07718.00000774@mb-m24.aol.com">news:20040520122305.07718.00000774@mb-m24.aol.com...
>: Bill Garber wrote:
>:
>: >I just tried it in the setup I have that it works in,
>: >and although it tries to boot, it says:
>: >"Unable To Load ProDOS".
>:
>: Then you've succeeded.
>:
>: That message comes from the ProDOS boot block,
>: and indicates that you don't have ProDOS in the
>: root directory.
>
>Then I have failed, as ProDOS "does" exist in the
>disks root directory, and will boot with Cs07 at
>"00" and by resetting and typing "PR#s". Would
>you possibly have an explanation for that? Maybe
>I need to reformat the volume and rewrite the
>files to it again.

What I meant was that in order to get to that message,
your machine had to run a fair number of instructions
correctly.

A possible explanation is that the boot block code
contains some code that does not work correctly.

Marginal timing could cause such an effect, but it
is wierd that it is repeatable.

-michael

Check out amazing quality sound for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/