[Info-vax] Micro Focus to be acquired by Open Text

[Kerry Main]

> -----Original Message-----
> From: Kerry Main <kemain.nospam at gmail.com>
> Sent: September-03-22 10:15 AM
> To: 'comp.os.vms to email gateway' <info-vax at rbnsn.com>
> Subject: RE: [Info-vax] Micro Focus to be acquired by Open Text
> 
> > -----Original Message-----
> > From: Info-vax <info-vax-bounces at rbnsn.com> On Behalf Of Johnny
> > Billquist via Info-vax
> > Sent: September-03-22 7:58 AM
> > To: info-vax at rbnsn.com
> > Cc: Johnny Billquist <bqt at softjar.se>
> > Subject: Re: [Info-vax] Micro Focus to be acquired by Open Text
> >
> > On 2022-09-02 17:10, Dave Froble wrote:
> > > On 9/2/2022 10:57 AM, Johnny Billquist wrote:
> > >> On 2022-09-02 16:45, Arne Vajhøj wrote:
> > >>> On 9/2/2022 10:33 AM, John Dallman wrote:
> > >>>> In article <63120065$0$705$14726298 at news.sunsite.dk>,
> > >>>> arne at vajhoej.dk (Arne Vajhøj) wrote:
> > >>>>
> > >>>>> What about CDC Display code?
> > >>>>>
> > >>>>> :-)
> > >>>>>
> > >>>>> Hint: 6 bit! (well 6 or 6/12 bit)
> > >>>>
> > >>>> <https://en.wikipedia.org/wiki/CDC_display_code> That's ... well,
> > >>>> it looks insane to me, but I presume it was at least somewhat
> > >>>> suited to the needs of the time. I don't believe the 63- and
> > >>>> 64-character variations can ever have been a good idea, though.
> > >>>
> > >>> It sort of made sense as the CDC system at the time operated on 60
> > >>> bit entities (18 bit addresses of 60 bit words).
> > >>>
> > >>> 10 characters of 6 bits in a 60 bit word is manageable.
> > >>>
> > >>> 5-10 characters of 6/12 bits in a 60 bit word is somewhat manageable.
> > >>>
> > >>> 7.5 characters of 8 bit in a 60 bit word is not fun.
> > >>
> > >> Just waiting for someone to bring up the PDP-10 now. Bytes are of
> > >> variable length in the hardware, but 5 7-bit bytes in one word was
> > >> common, with just one wasted bit per word.
> > >> But again, 8-bit bytes would waste 4 bits per word...
> > >>
> > >>   Johnny
> > >
> > > Back in the early 1970s I took a course in Cobol at University.
> > > Cobol on the PDP-10 used 6 bit characters.  6 characters per 36 bit word.
> > >
> > > There, you got your mention ...
> > >
> > > :-)
> >
> > SIXBIT. Yay! That was popular at DEC for a while. Funny thing is that
> > SIXBIT was also used on PDP-8, but they choose to do it differently
> > than the PDP-10 for some reason. Just adding to the confusion.
> >
> > (PDP-10 took the ASCII and subtracted 48 and then masked with 63,
> > while
> > PDP-8 took the ASCII and masked it with 63, if I remember right.)
> >
> >    Johnny
> >
> 
>  Re: PDP8 .. a nice historical PDP8 and other early compute players
> perspective - I believe by Richard (Richie) Lary:
> <http://sunsite.tus.ac.jp/pub/academic/computer-science/history/pdp-
> 8/docs/WHAT-IS-A-PDP8>

Correction to above link:
<https://web.archive.org/web/20040825183612/http://sunsite.tus.ac.jp/pub/academic/computer-science/history/pdp-8/docs/WHAT-IS-A-PDP8>

Really good historical Richie Lary  link on DEC, PDP8, VAX and VMS:

> <https://www.youtube.com/watch?v=lp2NSbJ2H1k>
> 
> Regards,
> 
> Kerry Main
> Kerry dot main at starkgaming dot com
> 
> 
> 
> 
> 
> 
> 
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