Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...]

From	Bob Eager <news0009@eager.cx>
Newsgroups	comp.misc
Subject	Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...]
Date	2024-08-08 20:45 +0000
Message-ID	<lhkp3iF3pe6U6@mid.individual.net> (permalink)
References	(3 earlier) <wwvfrrgrci1.fsf@LkoBDZeT.terraraq.uk> <66b38cf5$0$706$14726298@news.sunsite.dk> <v90tt0$3dtak$6@dont-email.me> <slrnvb946m.28a.dan@djph.net> <549cc6d8-d035-9efc-c112-a09609ec4b0b@example.net>

Show all headers | View raw

On Thu, 08 Aug 2024 22:24:30 +0200, D wrote:

>> It's the thing that holds the address of the current instruction being
>> executed.
>>
>> Effectively, CPU's operate like this loop here
>>
>>  int pc=0; while (1) {
>>    execute_instruction (pc);
>>    pc++;
>>  }
>>
>> After that, 'execute_instruction' can be thought of as a big
>> conditional statement that actually performs the task -- moving data
>> between CPU registers, reading from RAM, whatever.
>>
>>
>>
> Could it have been called instruction counter on some platforms? My
> memory is very hazy but I vaguely remember a register you could
> manipulate directly from my assembler labs and the long gone days when I
> thought computer viruses were interesting.

Instruction counter, to me, is something different. On the ICL 2900, it 
literally counts the number of instructions executed. It can be used 
instead of (or as well as) an interval timer, for scheduling.

The NCR/Elliott 4100 machines called the PC the S register (for Sequence 
register).




-- 
Using UNIX since v6 (1975)...

Use the BIG mirror service in the UK:
 http://www.mirrorservice.org

Back to comp.misc | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-07-24 11:58 +0300
  Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-24 11:08 +0200
    Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Johanne Fairchild <jfairchild@tudado.org> - 2024-07-24 10:21 -0300
    Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-07-24 15:10 -0700
      Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-25 11:24 +0200
        Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Rich <rich@example.invalid> - 2024-07-25 12:03 +0000
          Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-25 17:38 +0200
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Anton Shepelev <anton.txt@gmail.moc> - 2024-07-26 01:16 +0300
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-26 10:44 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-07-26 19:49 +0000
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-07-25 20:04 -0700
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-26 10:52 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Johanne Fairchild <jfairchild@tudado.org> - 2024-07-26 09:21 -0300
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-26 18:35 +0200
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Retrograde <fungus@amongus.com.invalid> - 2024-07-27 03:06 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-27 11:25 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-07-27 13:38 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-27 20:03 +0200
          Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-07-25 19:52 -0700
        Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-08-05 21:48 -0700
          Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-08-06 17:14 -0700
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Richard Kettlewell <invalid@invalid.invalid> - 2024-08-07 08:57 +0100
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] arnold@skeeve.com (Aharon Robbins) - 2024-08-07 15:04 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-08-07 22:53 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-08-08 09:21 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-08-08 23:52 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-08-09 20:54 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-08-09 23:32 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Dan Purgert <dan@djph.net> - 2024-08-08 09:33 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-08-08 22:24 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Rich <rich@example.invalid> - 2024-08-08 20:31 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-08-09 10:32 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Bob Eager <news0009@eager.cx> - 2024-08-08 20:45 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-08-08 23:53 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Dan Purgert <dan@djph.net> - 2024-08-09 01:14 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-08-09 02:41 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-08-08 09:20 +0000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Johanne Fairchild <jfairchild@tudado.org> - 2024-08-13 22:40 -0300
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-08-09 10:54 -0700
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-08-09 22:28 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] The Real Bev <bashley101@gmail.com> - 2024-08-10 12:12 -0700
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Johanne Fairchild <jfairchild@tudado.org> - 2024-08-13 22:43 -0300
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <remailer@domain.invalid> - 2024-08-13 22:54 -0400
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] kludge@panix.com (Scott Dorsey) - 2024-08-07 09:45 +0000
    Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] David LaRue <huey.dll@tampabay.rr.com> - 2024-08-05 14:49 +0000
      Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-08-05 21:45 +0200
  Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] George Musk <grgmusk@skiff.com> - 2024-07-25 11:49 +0000
    Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Marco Moock <mm+usenet-es@dorfdsl.de> - 2024-07-25 16:16 +0200
      Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] yeti <yeti@tilde.institute> - 2024-07-25 15:13 +0042
        Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-25 17:39 +0200
      Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Johanne Fairchild <jfairchild@tudado.org> - 2024-07-25 12:27 -0300
        Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-25 23:40 +0200
          Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2024-07-26 16:40 +0000
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-26 22:38 +0200
        Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-26 19:38 -0300
          Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-27 10:03 -0300
          Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-27 17:24 +0100
            Re: Emigration from Usenet D <nospam@example.net> - 2024-07-27 20:06 +0200
              Re: Emigration from Usenet Rich <rich@example.invalid> - 2024-07-27 18:31 +0000
                Re: Emigration from Usenet D <nospam@example.net> - 2024-07-28 11:23 +0200
            Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-27 21:01 +0100
              Re: Emigration from Usenet The Real Bev <bashley101@gmail.com> - 2024-07-27 18:48 -0700
              Re: Emigration from Usenet D <nospam@example.net> - 2024-07-28 11:25 +0200
              Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-28 10:53 +0100
                Re: Emigration from Usenet Rich <rich@example.invalid> - 2024-07-28 16:00 +0000
                Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-28 21:35 +0100
                Re: Emigration from Usenet Rich <rich@example.invalid> - 2024-07-28 20:51 +0000
                Re: Emigration from Usenet D <nospam@example.net> - 2024-07-28 19:14 +0200
            Re: Emigration from Usenet Andreas Eder <a_eder_muc@web.de> - 2024-07-28 19:48 +0200
            Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-28 21:58 -0300
              Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-29 08:50 +0100
                Re: Emigration from Usenet Javier <invalid@invalid.invalid> - 2024-07-29 08:51 +0000
                Re: Emigration from Usenet yeti <yeti@tilde.institute> - 2024-07-29 09:51 +0042
                Re: Emigration from Usenet Rich <rich@example.invalid> - 2024-07-29 12:58 +0000
                Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-29 20:50 -0300
                Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-30 11:55 -0300
                Re: Emigration from Usenet Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-07-30 20:35 +0000
                Re: Emigration from Usenet Richard Kettlewell <invalid@invalid.invalid> - 2024-07-29 14:21 +0100
            Re: Emigration from Usenet Johanne Fairchild <jfairchild@tudado.org> - 2024-07-28 22:00 -0300
              Re: Emigration from Usenet The Real Bev <bashley101@gmail.com> - 2024-07-28 19:41 -0700
                Re: Emigration from Usenet Mike Spencer <mds@bogus.nodomain.nowhere> - 2024-07-29 14:20 -0300
                Re: Emigration from Usenet The Real Bev <bashley101@gmail.com> - 2024-07-29 10:51 -0700
              Re: Emigration from Usenet D <nospam@example.net> - 2024-07-29 11:09 +0200
      Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Rich <rich@example.invalid> - 2024-07-25 16:53 +0000
        Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] not@telling.you.invalid (Computer Nerd Kev) - 2024-07-26 08:21 +1000
          Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Anton Shepelev <anton.txt@gmail.moc> - 2024-07-26 01:33 +0300
            Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Computer Nerd Kev <not@telling.you.invalid> - 2024-07-26 13:42 +1000
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] D <nospam@example.net> - 2024-07-26 11:00 +0200
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Computer Nerd Kev <not@telling.you.invalid> - 2024-07-26 22:18 +1000
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-07-28 01:55 +0000
              Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] Theo <theom+news@chiark.greenend.org.uk> - 2024-08-12 17:13 +0100
                Re: Emigration from Usenet [was: Re: PTD was the most-respected of the AUE regulars ...] not@telling.you.invalid (Computer Nerd Kev) - 2024-08-13 08:12 +1000

csiph-web