Re: No Slot Clock and Day Of Week apps?

[sicklittlemonkey <nick.westgate@gmail.com>]

On Jun 20, 7:42 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> No, sorry--I was thinking about the Thunderclock, not the NSC.
>
> In looking over the Dallas documentation, I agree that the day of week
> is coded 1-7.  Since this is just a mod 7 counter, it is pure convention
> which day corresponds to which code.  And since this chip stores the
> 2-digit year, there is no need for a calendar congruence using the
> day of week to determine the year (within a 5-6 year range).
>
> So it all depends on the NSC software, and what code it assigns to
> Sunday.  In the US, at least, it is common to consider weeks as starting
> with Sunday and ending with Saturday, which would suggest that Sunday
> is encoded as 1 and Saturday as 7, but this is just a likely convention.
>
> -michael

Ok, I'm relieved there aren't 2 sets of NSC hardware. ;-)

Yes, exactly, DOW interpretation is only a convention, but
unfortunately it seems Dallas chose a different convention from the
original NSC vendors. And perhaps the NSC vendors then adopted the new
convention.

This conclusion is drawn from the 3 available data points:
- Original (1986/1987) NSC manual:     1=MON
- SmartWatch Utility (1987) v1.1:      1=SUN
- No Slot Clock Utilities (1991) v.14: 1=SUN

All the other drivers and utilities available to me don't define the
DOW mapping.

I'd still like to get hold of the original NSC disk(s)/driver/
utilities which use the 1=MON convention. If anyone has these then
please upload it to asmiov and let me know.

Cheers,
Nick.