19 Jan
2015
19 Jan
'15
9:37 a.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of John
Wilson
Sent: 19 January 2015 08:05
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Operating systems of the 1970s handling dates beyond the year
2000
On Mon, Jan 19, 2015 at 02:07:59AM -0500, Mike Alexander wrote:
leap-year
MTS will work ok until the original IBM TOD clock
overflows in 2042.
I always liked how the March 1/1900 starting point sidestepped the ugliness.
When I tried an early date with Ultrix to make the day of the week correct
it said the date wasn't possible because it was before Ultrix was released.
I found a suitable date in 1998.
Regards
Rob
Fixing it for 2042 will be a bigger problem if
anyone who cares is
still around. Since STCK is a non-privileged instruction finding and
fixing the problems will be challenging.
The great thing about emulation is that you can make an instruction be as
thorny as you want, temporarily, to flush out stuff like this.
John Wilson, ETS4
D Bit