Re: Thunder Clock

[dpeschel@u.washington.edu (Derek Peschel)]

In article <DJ5789.D11.0.queen@torfree.net>,
Hans Ruschka <bw199@torfree.net> wrote:

>I use a enhanced 2e with a Thunderclock in slot#5.  The clock works fine 
>as long as I use a Prodos Version 1.9..  As soon as I switch to a version 
>2.0.., the clock shows the year 1987 and can not be reset to 1995!!  Back 
>to Prodos 1.9. and everything is ok.  
>Questions: 1) What causes this problem with the years?
>           2) The software used to set the clock has no facility to set 
>the year, how does the clock know that it is 1995 when I use Proterm 1.9?
>Thanks for any suggestions.

Someone may post a more detailed answer, but here goes anyway.

In a way, ProDOS doesn't know if the year is 1987, or 1995, or whatever.
The Thunderclock only keeps track of an eight-year range, which ProDOS
converts to a useful form.  Since you can't change the number of years in
the clock's "calendar," you need to patch ProDOS instead.

It sounds like you have a patched version of ProDOS 1.9, and an unpatched
version of ProDOS 2.0.

-- Derek