[Simh] OS development

[Johnny Billquist]

On 2015-06-14 23:37, Johnny Billquist wrote:
> On 2015-06-14 23:30, Rhialto wrote:
>>>> As for the "New UTC (128 bit) format": that's probably documented
>>>> somewhere.  But I haven't found it.  Native VMS times are 64-bits. DTSS
>>>> uses an opaque 128-bit structure that may be the basis for this, but a
>>>> quick search hasn't turned up a revised DAP spec.  DTSS time includes
>>>> precision/accuracy, not just time.
>>
>> Is that the format as returned by RSX GTIM$, i.e. 8 words which are in
>> sequence year since 1900, month, day, hour, minute, second, tick of
>> second, ticks per second? If I'm guessing, "New UTC (128 bit) format"
>> would be this and be expressed in UTC instead of some unspecified
>> timezone.
>
> Nope. The RSX format actually stores 8 16-bit words, which are (in order):

[...]

Doh. Sorry for the stupid reply. You obviously knew the format.
Anyway, the "New UTC (128 bit) format" does not sound like anything 
RSX-like at all. I would assume it's a binary format expressing an 
offset from some epoch. I can't see VMS or DAP ever going back to 
something like the RSX time format.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol