In a message dated: Thu, 22 Aug 2002 08:56:37 EDT
"Jerry Feldman" said:
>Burger King's point of Sale system in the early 1970s was a PDP-8M with 4
>attached registers. No disk, no paper tape, core memory. For the modem, we
>had to time the 1200 baud with timing loops and send a bit at a time.
In a message dated: Thu, 22 Aug 2002 09:02:50 EDT
Jon Hall said:
>O.K.:
>
>First you toggle in the BIN loader. On the PDP-8 this was seventeen
>twelve-bit instructions, so you have to flip (and get ABSOLUTELY CORRECT)
>204 switches, and this was AFTER you toggled in the correct starting address
In a message dated: Thu, 22 Aug 2002 00:12:36 EDT
"Bayard R. Coolidge" said:
>[EMAIL PROTECTED] asked:
>
was Unix ever developed on any of those?
>(meaning the 12-bit PDP-8/PDP-12 architectures)
>
>AFAIK, no. I believe that the original development was
>on some PDP-11's (11/45's?) that Bell
In a message dated: Wed, 21 Aug 2002 19:30:45 EDT
[EMAIL PROTECTED] said:
> I'm just curious... was Unix ever developed on any of those? I was pretty
>much under the impression that Unix assumes an 8-bit byte, but I don't
>really have anything to back that up...
It was originally *developed*
[EMAIL PROTECTED] said:
> All this in 4K memory.
Yeah, but Burger King was not selling as many hamburgers back in those days. :-)
md
--
=
Jon "maddog" Hall
Executive Director Linux International(SM)
email: [E
> P.S. Geez, I guess I am getting to be "older than dirt"! ;^)
>
> - Original Message -
> From: "Jerry Feldman" <[EMAIL PROTECTED]>
> To: "Greater NH Linux User Group" <[EMAIL PROTECTED]>
> Sent: Thursday, August 22, 2002 8:56 AM
>
quot;older than dirt"! ;^)
- Original Message -
From: "Jerry Feldman" <[EMAIL PROTECTED]>
To: "Greater NH Linux User Group" <[EMAIL PROTECTED]>
Sent: Thursday, August 22, 2002 8:56 AM
Subject: Re: UNIX Arcana [was Re: Perl (or Unix vs. MS, actually) ]
>
[EMAIL PROTECTED] said:
> AFAIK, no. I believe that the original development was on some
> PDP-11's (11/45's?)
No, the original development was on a PDP-7, and in assembler.
The second machine it ran on was a PDP-11, also in assembler. It was after
that port that Dennis wrote "C", to make the
Discussed that last night at the BLU meeting.
Many of the PDP-8s did not come with a ROM. To load the executive, you
would key in the RIM(ReadInMode) loader on the front panel switches. The
RIM loader was a very simple paper tape reader program whose purpose was to
read in the real paper tape
On Thu, 22 Aug 2002, at 12:12am, Bayard R. Coolidge wrote:
> Bayard, who tried, but failed to find his old copy of the
> RIM loader...
Okay, I have to ask: What's a "RIM loader"?
--
Ben Scott <[EMAIL PROTECTED]>
| The opinions expressed in this message are those of the author and do not |
| n
[EMAIL PROTECTED] asked:
>>> was Unix ever developed on any of those?
(meaning the 12-bit PDP-8/PDP-12 architectures)
AFAIK, no. I believe that the original development was
on some PDP-11's (11/45's?) that Bell Labs had at the time.
Those, of course, are 16-bit machines. But, I don't ever
hearin
On Wed, 21 Aug 2002, at 6:44pm, Jon Hall wrote:
> To throw a bit (pun un-intentional) more into this discussion, don't
> assume that a "byte" was eight bits. The PDP-8, Linc-8 and PDP-12 for
> instance, were all twelve bit words, broken down into two six-bit
> characters.
I'm just curious... w
To throw a bit (pun un-intentional) more into this discussion, don't assume
that a "byte" was eight bits. The PDP-8, Linc-8 and PDP-12 for instance, were
all twelve bit words, broken down into two six-bit characters.
Nevertheless, back in those days saving a few bits for every entry in a symbol
On Wed, 21 Aug 2002, at 2:52pm, Bill Freeman wrote:
> The description is close. Radix 50 actually allows you to get three
> characters into a 16 bit word (40*40*40 <= 65536), or 6 into a 32 bit
> word.
Ya know, I thought a gain of only one character (five characters, vs the
four 8-bit bytes in
Mark Komarinski writes:
> Good thing more colors other than green and amber were invented too.
Newcommer! We only had black print on those cards and listings.
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[EMAIL PROTECTED] writes:
> Way back when 16 kilobytes was a lot of memory, a method for encoding five
> characters into a single 32-bit machine word was developed. It was called
> "Radix-50", or "RAD50". The 50 is octal, or 40 decimal. The character set
> was 26 monocase letters, 10 digi
On Wed, 21 Aug 2002, at 10:10am, [EMAIL PROTECTED] wrote:
> Okay, I'll buy that, but why create a linker that only supports 5
> character function names?
Okay, some Google searches eventually tracked down this explanation:
Way back when 16 kilobytes was a lot of memory, a method for encoding
Good thing more colors other than green and amber were invented too.
-Mark
On Wed, Aug 21, 2002 at 11:00:10AM -0400, Andrew W. Gaunt wrote:
>
> Back in the early days of computers there weren't
> as many characters to go around and folks had to
> be very conservative with their use. Since then
Back in the early days of computers there weren't
as many characters to go around and folks had to
be very conservative with their use. Since then, more
have been pulled out of the ground so we can use
them more liberally.
--
__
| 0|___||. Andrew Gaunt *nix Sys. Admin., etc.
_| _| :
In a message dated: Tue, 20 Aug 2002 16:43:36 EDT
[EMAIL PROTECTED] said:
> I believe it was Ken Thompson, and I believe the remark was intended to be
>humorous. Step back and ask: Why would he spell "create" as "creat" in the
>first place? If you are going to type five characters, you might
Didn't you work with Grace Hopper :-)
"Hewitt Tech" wrote:
> You had "C"? All we had was assembler! You had assembler? All we had was
> ones and zeros! You had ones and zeros? ...
--
--
Gerald Feldman <[EMAIL PROTECTED]>
Boston Computer Solutions and Consulting
ICQ#156300 PGP Key ID:C5061EA9
PGP
You had "C"? All we had was assembler! You had assembler? All we had was
ones and zeros! You had ones and zeros? ...
-Alex
- Original Message -
From: "Jerry Feldman" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, August 20, 2002 4:53 PM
Subjec
On Tue, 20 Aug 2002, Jerry Feldman wrote:
=>I think you are correct. Create(2) is a system call. Linkage editors those
=>days were rather primitive. I think the name limit was either 7 or 8, but
=>external names in C were many times autoprefixed with __, such that creat
=>became __creat.
=>The
I think you are correct. Create(2) is a system call. Linkage editors those
days were rather primitive. I think the name limit was either 7 or 8, but
external names in C were many times autoprefixed with __, such that creat
became __creat.
The C language had a limit of 8 characters for a variabl
The 14 character limit did exist in Unix versions 6 and 7. Version 6 was
used as a basis for the BSD releases. Version 7 was the basis for what
became System 3 followed by System V. Long file names I think came out for
the first time in BSD 4.3 (or possibly 4.2).
Unlike MS DOS, which had a lim
On Tue, 20 Aug 2002, at 4:14pm, [EMAIL PROTECTED] wrote:
>> I think he is thinking of the five-character limit in the original
>> linker(s) used to develop Unix (which very well may have come from
>> Multics). That five-character limit gave us the infamous creat(2) system
>> call.
>
> H, I d
In a message dated: Tue, 20 Aug 2002 16:20:29 EDT
[EMAIL PROTECTED] said:
> I think he is thinking of the five-character limit in the original
>linker(s) used to develop Unix (which very well may have come from Multics).
>That five-character limit gave us the infamous creat(2) system call.
On Tue, 20 Aug 2002, at 3:09pm, [EMAIL PROTECTED] wrote:
>> Then you believe incorrectly. Many variants of Unix had a
>> 14-character filename limit. There is still a limit today, though
>> it's ridiculously large, so as not to matter practically.
>
> Ahh, 14 characters, that does sound familia
In a message dated: Tue, 20 Aug 2002 15:01:45 EDT
"Derek D. Martin" said:
>> I don't believe there was ever a name-length limitation on filenames.
>
>Then you believe incorrectly. Many variants of Unix had a
>14-character filename limit. There is still a limit today, though
>it's ridiculously
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