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Groups > alt.folklore.computers > #153358

Re: the FORTH computer language

From "Charles Richmond" <numerist@aquaporin4.com>
Newsgroups alt.folklore.computers
Subject Re: the FORTH computer language
Date 2015-10-26 14:44 -0500
Organization A noiseless patient Spider
Message-ID <n0lvmo$i38$1@dont-email.me> (permalink)
References (7 earlier) <n0e6hl$kjl$1@dont-email.me><84a8r92ptx.fsf@example.com> <n0ef99$r9l$1@dont-email.me><PM000522D9EAB50649@aca44296.ipt.aol.com> <n0g7s1$he$1@dont-email.me><PM000522EE18B332A4@aca42931.ipt.aol.com> <n0j050$2n8$1@dont-email.me><PM00052300F849B5FD@aca2d620.ipt.aol.com> <1bsi4xy8j5.fsf@pfeifferfamily.net>

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"Joe Pfeiffer" <pfeiffer@cs.nmsu.edu> wrote in message 
news:1bsi4xy8j5.fsf@pfeifferfamily.net...
> jmfbahciv <See.above@aol.com> writes:
>
>> gareth wrote:
>>> "jmfbahciv" <See.above@aol.com> wrote in message
>>> news:PM000522EE18B332A4@aca42931.ipt.aol.com...
>>>> gareth wrote:
>>>>> "jmfbahciv" <See.above@aol.com> wrote in message
>>>>> news:PM000522D9EAB50649@aca44296.ipt.aol.com...
>>>>>> You are wrong.  What is being executed is the running machine's 
>>>>>> machine
>>>>>> code _after_ the old PDP instruction has been transformed from the 
>>>>>> PDP
>>>>>> instruction into the running machine's instruction.  In this case,
>>>>>> the emulator is an app which can spawn a child which "runs" an old
>>>>>> OS.  that OS can then spawn "jobs" which will run old apps.  And
>>>>>> so on, and so on.
>>>>>
>>>>> What was running in the later versions of the PDP-11 that were
>>>>> microcoded?
>>>>
>>>> I don't understand your question.  What microcode?
>>>
>>> The first PDP-11 That I encountered in 1971 was all TTL. Those that I
>>> encountered
>>> 4 or 5 years later were microcoded.
>>
>> I don't remember any microcode.  But, not that I think of it, the
>> -11s I dealt with were remote stations and the ones on the KL
>> front end.  Those didn't have microcode.  If they did, I sure
>> don't remember the filenames.
>
> Microcode is most commonly burned into ROM; there wouldn't be
> filenames.  Some machines have had a writeabable control store (some
> machines that do have been mentioned in this thread), but that's by far
> the less common option.

It might be more instructive to give some general information here.

The microcode is located inside the CPU.  When the CPU fetches an 
instruction from memory, the binary code of that instruction causes a 
section of the microcode inside the CPU to be executed.  That microcode 
sequence switches the internal CPU electronics to accomplish the 
instruction.  So what we think of as the instructions of the CPU... actually 
are represented *inside* the CPU by sequences of instructions of the 
microcode program.

And *no*, the microcode program does *not* have the same bit patterns as the 
computer's instructions themselves.

-- 

numerist at aquaporin4 dot com

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Thread

the FORTH computer language hancock4@bbs.cpcn.com - 2015-10-19 11:57 -0700
  Re: the FORTH computer language mentificium@gmail.com - 2015-10-20 05:05 -0700
  Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-20 13:57 -0400
    Re: the FORTH computer language Daiyu Hurst <daiyu.hurst@gmail.com> - 2015-10-24 21:26 -0700
      Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-25 10:17 +0000
      Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-25 18:13 -0500
        Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-25 21:35 -0400
          Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-26 14:28 -0500
            Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-26 17:46 -0400
              Re: the FORTH computer language Peter Flass <peter_flass@yahoo.com> - 2015-10-26 17:49 -0400
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:29 -0500
              Re: the FORTH computer language Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-27 19:55 +0000
  Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-21 11:45 +0100
    Re: the FORTH computer language Whiskers <catwheezel@operamail.com> - 2015-10-21 12:34 +0000
      Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-21 14:36 +0100
    Re: the FORTH computer language David Hume <David.Hume@example.com> - 2015-10-22 09:38 +0100
      Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-22 11:07 +0100
        Re: the FORTH computer language David Hume <David.Hume@example.com> - 2015-10-22 11:35 +0100
          Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-22 12:26 +0100
            Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-23 21:52 +0100
              Re: the FORTH computer language David Hume <David.Hume@example.com> - 2015-10-23 23:16 +0100
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-24 00:21 +0100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-24 13:23 +0000
                Re: the FORTH computer language Stan Barr <plan.b@bluesomatic.org> - 2015-10-24 15:25 +0000
                Re: the FORTH computer language Morten Reistad <first@last.name.invalid> - 2015-10-24 22:37 +0200
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-25 13:30 +0000
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-25 13:30 +0000
                Re: the FORTH computer language Stan Barr <plan.b@bluesomatic.org> - 2015-10-25 15:53 +0000
                Re: the FORTH computer language Stan Barr <plan.b@bluesomatic.org> - 2015-10-25 16:08 +0000
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-26 12:08 +0000
                Re: the FORTH computer language Stan Barr <plan.b@bluesomatic.org> - 2015-10-26 16:24 +0000
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-24 16:26 +0100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-25 13:30 +0000
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-25 16:33 +0000
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-26 12:03 +0000
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 06:49 -0700
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 07:02 -0700
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 07:18 -0700
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 07:28 -0700
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 07:39 -0700
                Re: the FORTH computer language pechter@S20.pechter.dyndns.org (William Pechter) - 2015-10-26 16:25 +0000
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-26 14:36 -0500
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-26 17:41 -0400
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:26 -0500
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-27 22:47 -0400
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-27 12:22 +0000
                Re: the FORTH computer language Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-10-27 09:03 -0600
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:38 -0500
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-27 08:43 -0700
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:43 -0500
                Re: the FORTH computer language hankvc@blackhole.lostwells.org (Hank) - 2015-10-28 19:05 +0000
                Re: the FORTH computer language "78lp" <78lp@nospam.com> - 2015-10-28 16:08 +1100
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-28 05:43 -0700
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:37 -0500
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-27 18:48 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-28 12:58 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-28 08:15 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-29 13:55 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:37 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-30 04:58 +1100
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 12:19 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-28 12:58 +0000
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-28 11:08 -0700
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-28 18:46 +0000
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-28 17:58 -0400
                Re: the FORTH computer language David Hume <David.Hume@example.com> - 2015-10-28 22:04 +0000
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-28 17:39 -0500
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-29 00:13 -0400
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-28 22:52 -0600
                Re: the FORTH computer language "78lp" <78lp@nospam.com> - 2015-10-29 15:54 +1100
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-28 16:47 -0600
                Re: the FORTH computer language Walter Bushell <proto@panix.com> - 2015-11-04 12:04 -0500
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-29 05:54 +1100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-29 13:55 +0000
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 07:21 -0700
                Re: the FORTH computer language Andrew Swallow <am.swallow@btinternet.com> - 2015-10-29 16:48 +0000
                Re: the FORTH computer language JimP <solosam90@gmail.com> - 2015-10-29 14:47 -0500
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 15:09 -0700
                Re: the FORTH computer language Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 17:19 +0000
                Re: the FORTH computer language Greymaus <mausg@mail.com> - 2015-10-29 18:18 +0000
                Re: the FORTH computer language Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-29 18:02 +0000
                Re: the FORTH computer language Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 19:37 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 11:28 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:42 -0600
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-29 14:49 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:57 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-30 08:39 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-31 13:22 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-31 09:36 -0600
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-31 09:47 -0700
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-01 15:14 +1100
                Re: the FORTH computer language David Wade <dave.g4ugm@gmail.com> - 2015-11-01 16:38 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-02 12:58 +1100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-11-02 13:17 +0000
                Re: the FORTH computer language "Osmium" <r124c4u102@comcast.net> - 2015-11-02 10:05 -0600
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-31 15:23 +1100
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:44 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language hancock4@bbs.cpcn.com - 2015-10-30 12:25 -0700
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-31 13:22 +0000
                Re: the FORTH computer language David Wade <dave.g4ugm@gmail.com> - 2015-11-01 16:32 +0000
                Re: the FORTH computer language "Osmium" <r124c4u102@comcast.net> - 2015-11-01 11:03 -0600
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-11-01 12:48 -0500
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-11-02 13:17 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-03 07:16 +1100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-11-03 12:55 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-04 08:07 +1100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-11-04 13:52 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-05 08:52 +1100
                Re: the FORTH computer language Morten Reistad <first@last.name.invalid> - 2015-11-05 07:48 +0100
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-11-06 06:31 +1100
                Re: the FORTH computer language hancock4@bbs.cpcn.com - 2015-11-02 07:34 -0800
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-11-01 23:55 -0800
                Re: the FORTH computer language hancock4@bbs.cpcn.com - 2015-11-02 07:40 -0800
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-11-02 14:59 -0600
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-30 05:08 +1100
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-28 13:15 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-29 13:55 +0000
                Re: the FORTH computer language Andrew Swallow <am.swallow@btinternet.com> - 2015-10-29 16:47 +0000
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 07:29 -0700
                Re: the FORTH computer language "gareth" <no.spam@thank.you.invalid> - 2015-10-29 14:47 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:53 -0600
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-29 15:24 -0500
                Re: the FORTH computer language scott@slp53.sl.home (Scott Lurndal) - 2015-10-28 13:20 +0000
                Re: the FORTH computer language hankvc@blackhole.lostwells.org (Hank) - 2015-10-28 18:54 +0000
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-28 12:47 -0700
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-28 15:46 -0400
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-28 12:50 -0700
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-29 13:55 +0000
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 08:33 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-30 04:55 +1100
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-31 15:18 +1100
                Re: the FORTH computer language pechter@S20.pechter.dyndns.org (William Pechter) - 2015-10-29 19:34 +0000
                Re: the FORTH computer language Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 19:43 +0000
                Re: the FORTH computer language pechter@S20.pechter.dyndns.org (William Pechter) - 2015-10-29 20:04 +0000
                Re: the FORTH computer language hancock4@bbs.cpcn.com - 2015-10-29 13:28 -0700
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language pechter@S20.pechter.dyndns.org (William Pechter) - 2015-10-30 16:43 +0000
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-29 15:37 -0400
                Re: the FORTH computer language rpw3@rpw3.org (Rob Warnock) - 2015-11-03 06:56 +0000
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-29 13:55 +0000
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-29 15:47 -0400
                Re: the FORTH computer language Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 14:14 -0600
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-30 20:50 -0400
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-30 13:54 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-28 16:05 +1100
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-28 15:52 -0400
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-29 12:29 +1100
                Re: the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-29 15:51 -0400
                Re: the FORTH computer language Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-10-26 09:05 -0600
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-26 14:44 -0500
                Re: the FORTH computer language hancock4@bbs.cpcn.com - 2015-10-27 10:28 -0700
                Re: PDP-11, was the FORTH computer language John Levine <johnl@iecc.com> - 2015-10-26 17:19 +0000
                Re: PDP-11, was the FORTH computer language Rich Alderson <news@alderson.users.panix.com> - 2015-10-26 17:02 -0400
                Re: PDP-11, was the FORTH computer language pechter@S20.pechter.dyndns.org (William Pechter) - 2015-10-29 19:40 +0000
                Re: the FORTH computer language "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-26 14:34 -0500
                Re: the FORTH computer language Huge <Huge@nowhere.much.invalid> - 2015-10-26 21:22 +0000
                Re: the FORTH computer language Morten Reistad <first@last.name.invalid> - 2015-10-27 07:00 +0100
                Re: the FORTH computer language timcaffrey420@gmail.com - 2015-10-27 10:15 -0700
                Re: the FORTH computer language scott@slp53.sl.home (Scott Lurndal) - 2015-10-27 20:09 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-27 06:42 +1100
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 15:22 -0700
                Re: the FORTH computer language Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 15:23 -0700
                Re: the FORTH computer language Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-27 19:55 +0000
                Re: the FORTH computer language Michael Black <et472@ncf.ca> - 2015-10-27 16:09 -0400
                Re: the FORTH computer language Elliott Roper <nospam@yrl.co.uk> - 2015-10-25 19:31 +0000
                Re: the FORTH computer language jmfbahciv <See.above@aol.com> - 2015-10-26 12:03 +0000
                Re: the FORTH computer language scott@slp53.sl.home (Scott Lurndal) - 2015-10-26 13:10 +0000
                Re: the FORTH computer language "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-10-27 06:45 +1100
                Re: the FORTH computer language Stan Barr <plan.b@bluesomatic.org> - 2015-10-24 07:03 +0000

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