11 Jul
2012
11 Jul
'12
3:16 p.m.
At 12:12 PM 7/11/2012, Richard wrote:
For OS/8, you only get *3* bits for the year plus a
high 4K bit set if
the year is out of range? Does this mean years higher than 1977 are
encoded as 4096+(year-1977)?
...
Can anyone with RT-11 or OS/8 and TECO v40 verify what is described above?
As already mentioned, this is consistent with OS/8 date code - 3 bits
of year and two of extension.
You can't enter dates later than 1999:
.DATE 31-DEC-99
.DATE
Friday December 31, 1999
.DATE 1-JAN-00
BAD DATE
.DATE 1-JAN-2000
BAD DATE
What 31-DEC-99 gives you from TECO:
.R TECO
*^B==$$
16375
(12 * 32) + 31) * 8 = 3320
(1999 - 1970) & 7 = 5
3325 DEC, 6375 OCT plus 4096 gives 16375.
You can't tell what this really means (it could be 1983, 1991, or 1999)
but that's an OS/8 failure, not TECO.
-Rick