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1956 IBM hard drive
http://www.neatorama.com/images/2006...puter-1956.jpg
In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch |
1956 IBM hard drive
On Dec 4, 8:29 am, "Eisboch" wrote:
http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) |
1956 IBM hard drive
On Dec 4, 9:15 am, HK wrote:
wrote: On Dec 4, 8:29 am, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) I built a working nuclear cloud chamber for my 7th grade science project. It worked perfectly. Damned thing incorporated a spark coil from a Model A Ford. I take it you don't beleive me, no problem, I don't really think I have a credibility problem here;) Me and dad built it on a piece of plywood with some wooden "T's". It was really suited better for a game where you get to slide marbles down the chute in ones, twos, or threes. The idea is to leave your opponent with the last T to turn... But it was a computer in all practiacl purposes, it worked by switches being either on or off as it were... |
1956 IBM hard drive
wrote:
On Dec 4, 9:15 am, HK wrote: wrote: On Dec 4, 8:29 am, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) I built a working nuclear cloud chamber for my 7th grade science project. It worked perfectly. Damned thing incorporated a spark coil from a Model A Ford. I take it you don't beleive me, no problem, I don't really think I have a credibility problem here;) Me and dad built it on a piece of plywood with some wooden "T's". It was really suited better for a game where you get to slide marbles down the chute in ones, twos, or threes. The idea is to leave your opponent with the last T to turn... But it was a computer in all practiacl purposes, it worked by switches being either on or off as it were... I believe you. I also put together some switch operated computers. I also built a working cloud chamber in the 7th grade and could provide you with the details, although there is one detail I cannot recall precisely. It was, after all, quite a while ago. |
1956 IBM hard drive
On Dec 4, 9:19 am, wrote:
On Dec 4, 9:15 am, HK wrote: wrote: On Dec 4, 8:29 am, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) I built a working nuclear cloud chamber for my 7th grade science project. It worked perfectly. Damned thing incorporated a spark coil from a Model A Ford. I take it you don't beleive me, no problem, I don't really think I have a credibility problem here;) Me and dad built it on a piece of plywood with some wooden "T's". It was really suited better for a game where you get to slide marbles down the chute in ones, twos, or threes. The idea is to leave your opponent with the last T to turn... But it was a computer in all practiacl purposes, it worked by switches being either on or off as it were...- Hide quoted text - - Show quoted text - Oh, and it was not an origional idea, I based it on a game I had seen on TV. Anyway,that year for the science fair I built a working city with a bicycle generator for working lighting... I got dismissed as they said I must have had help from dad, even though he was working in Poughkeepsie at the time and told them I had indeed done it myself.. I am and have always been a wiz with stuff like that, something called three dimensional comprehension so beleive what you want, I will do the same, cough, lobsta' boat, cough.... |
1956 IBM hard drive
On Dec 4, 9:24 am, wrote:
On Dec 4, 9:19 am, wrote: On Dec 4, 9:15 am, HK wrote: wrote: On Dec 4, 8:29 am, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) I built a working nuclear cloud chamber for my 7th grade science project. It worked perfectly. Damned thing incorporated a spark coil from a Model A Ford. I take it you don't beleive me, no problem, I don't really think I have a credibility problem here;) Me and dad built it on a piece of plywood with some wooden "T's". It was really suited better for a game where you get to slide marbles down the chute in ones, twos, or threes. The idea is to leave your opponent with the last T to turn... But it was a computer in all practiacl purposes, it worked by switches being either on or off as it were...- Hide quoted text - - Show quoted text - Oh, and it was not an origional idea, I based it on a game I had seen on TV. Anyway,that year for the science fair I built a working city with a bicycle generator for working lighting... I got dismissed as they said I must have had help from dad, even though he was working in Poughkeepsie at the time and told them I had indeed done it myself.. I am and have always been a wiz with stuff like that, something called three dimensional comprehension so beleive what you want, I will do the same, cough, lobsta' boat, cough....- Hide quoted text - - Show quoted text - Anyway, I got to go play with horsies now... Having been an active member of this group for so long, horse **** has no effect on me, but I don't like to touch it;) |
1956 IBM hard drive
On Tue, 4 Dec 2007 06:28:37 -0800 (PST),
wrote: On Dec 4, 9:24 am, wrote: On Dec 4, 9:19 am, wrote: On Dec 4, 9:15 am, HK wrote: wrote: On Dec 4, 8:29 am, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch I built a computer that did addition in the fifth grade, it was not nearly that big.;) I built a working nuclear cloud chamber for my 7th grade science project. It worked perfectly. Damned thing incorporated a spark coil from a Model A Ford. I take it you don't beleive me, no problem, I don't really think I have a credibility problem here;) Me and dad built it on a piece of plywood with some wooden "T's". It was really suited better for a game where you get to slide marbles down the chute in ones, twos, or threes. The idea is to leave your opponent with the last T to turn... But it was a computer in all practiacl purposes, it worked by switches being either on or off as it were...- Hide quoted text - - Show quoted text - Oh, and it was not an origional idea, I based it on a game I had seen on TV. Anyway,that year for the science fair I built a working city with a bicycle generator for working lighting... I got dismissed as they said I must have had help from dad, even though he was working in Poughkeepsie at the time and told them I had indeed done it myself.. I am and have always been a wiz with stuff like that, something called three dimensional comprehension so beleive what you want, I will do the same, cough, lobsta' boat, cough....- Hide quoted text - - Show quoted text - Anyway, I got to go play with horsies now... Having been an active member of this group for so long, horse **** has no effect on me, but I don't like to touch it;) Oh, pferdeäpfel. -- John H |
1956 IBM hard drive
"Eisboch" wrote in message ... http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch Not 5 MB of data. Bytes were a later invention. They were 7 bit characters. 6 bits of data and a parity bit. Bytes came in when they needed upper and lower case characters on the printer. |
1956 IBM hard drive
On Tue, 04 Dec 2007 23:13:55 GMT, Short Wave Sportfishing
wrote: My first computer had a paper tape reader and I had to cold start boot strap it. The first computer I ever programmed was like that: Summer of 1967, Control Data 160A, 4K 12 bit words, as big as a large desk, cost approx $80K, paper tape in, paper tape out, environmental requirements: 72 degrees F +/- 2 degrees, 50% humidity +/- 10%. We copied the cold boot tape onto metalic mylar to keep it from wearing out quite as fast. Bear in mind that $80K then was like $500K now. Surprisingly enough we actually got some useful work out of the machine and I launched my entire adult career with it. |
1956 IBM hard drive
JimH wrote:
"Eisboch" wrote in message ... http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch Leap ahead 25 years.............. Bill Gates, 1981: "640K (roughly 1/2 of a megabyte) ought to be enough for anybody." Leap ahead? That was before under-educated college graduates started writing applications at Microsoft. |
1956 IBM hard drive
wrote in message ... On Tue, 4 Dec 2007 17:09:22 -0500, "D.Duck" wrote: The IBM 350 disk system stored 5 million 8-bit (7-bits plus 1 odd parity bit) characters (about 4.4 MB). http://en.wikipedia.org/wiki/IBM_305 Somebody needs to fix the Wiki. It was 7 bits (remember the "odd parity"?) The bits are 1, 2, 4, 6, A, B and parity. It goes with "7 track tape" etc. Here's from the horse's mouth: "The 305 RAMAC is an entirely new machine which contains its own input and output devices and processing unit as well as a built-in 5-million-digit disk memory. Both machines operate according to a program of electronically stored instructions." http://www-03.ibm.com/ibm/history/ex...0/650_pr2.html |
1956 IBM hard drive
On Tue, 04 Dec 2007 20:22:06 -0500, Wayne.B
wrote: On Tue, 04 Dec 2007 23:13:55 GMT, Short Wave Sportfishing wrote: My first computer had a paper tape reader and I had to cold start boot strap it. The first computer I ever programmed was like that: Summer of 1967, Control Data 160A, 4K 12 bit words, as big as a large desk, cost approx $80K, paper tape in, paper tape out, environmental requirements: 72 degrees F +/- 2 degrees, 50% humidity +/- 10%. We copied the cold boot tape onto metalic mylar to keep it from wearing out quite as fast. Bear in mind that $80K then was like $500K now. Surprisingly enough we actually got some useful work out of the machine and I launched my entire adult career with it. Technically, I suppose my first "personal" compuer was an original Roberts calculator kit. One of the AF Captains in the survival course at Kessler knew him and we got to talking and he obtained one for me. Pretty cool deal. Next up was an Altair 8800 when I went to work for DG - basically the front panel was a duplicate of the original Nova computer. I know I've told the story about programming the computer at Sylvania with phone jacks. |
1956 IBM hard drive
On Tue, 04 Dec 2007 23:56:07 GMT, wrote:
On Tue, 4 Dec 2007 18:21:35 -0500, " JimH" ask wrote: "Eisboch" wrote in message om... http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch Leap ahead 25 years.............. Bill Gates, 1981: "640K (roughly 1/2 of a megabyte) ought to be enough for anybody." Leap ahead? At that time, he was exaclty correct. For about ten minutes. :) One of the weirdest things I ever heard during the early mini-computer hey day was Ed DeCastro saying in a meeting that he thought that email would be strictly limited to inter-office communications and really wouldn't work outside that setting. ~~ snerk ~~ |
1956 IBM hard drive
On Tue, 4 Dec 2007 08:29:22 -0500, "Eisboch" wrote:
http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. If I remember correctly, the ones that DEC and DG built used head motors that weighed 160 pounds and were made out of cast aluminum. Damned things were bigger than washing macines. |
1956 IBM hard drive
On Wed, 05 Dec 2007 02:50:25 GMT, Short Wave Sportfishing
wrote: On Tue, 4 Dec 2007 08:29:22 -0500, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. If I remember correctly, the ones that DEC and DG built used head motors that weighed 160 pounds and were made out of cast aluminum. Damned things were bigger than washing macines. Had an Acme calculator back in '53. Took up the entire garage and had to run a 440V service to heat up the tubes. Probably weighed 8 tons total. The biggest part was the "keyboard," which had pneumatically assisted cast iron foot pedals in a 12" steel I-beam framework. The servo cylinders for the "2" pedal always acted up, so I got a wrong answer to the grocery list. Wife convinced me just use paper and pencil so we could put the cars back in there. Said she was also getting tired of me always having a crew of ironworkers around to fix the thing. Those were the days, eh? --Vic |
1956 IBM hard drive
Short Wave Sportfishing wrote:
On Tue, 04 Dec 2007 20:22:06 -0500, Wayne.B wrote: On Tue, 04 Dec 2007 23:13:55 GMT, Short Wave Sportfishing wrote: My first computer had a paper tape reader and I had to cold start boot strap it. The first computer I ever programmed was like that: Summer of 1967, Control Data 160A, 4K 12 bit words, as big as a large desk, cost approx $80K, paper tape in, paper tape out, environmental requirements: 72 degrees F +/- 2 degrees, 50% humidity +/- 10%. We copied the cold boot tape onto metalic mylar to keep it from wearing out quite as fast. Bear in mind that $80K then was like $500K now. Surprisingly enough we actually got some useful work out of the machine and I launched my entire adult career with it. Technically, I suppose my first "personal" compuer was an original Roberts calculator kit. One of the AF Captains in the survival course at Kessler knew him and we got to talking and he obtained one for me. Pretty cool deal. Next up was an Altair 8800 when I went to work for DG - basically the front panel was a duplicate of the original Nova computer. You have to love good old Ed, he store it fair and square and wasn't going to let anybody steal it from him! I know I've told the story about programming the computer at Sylvania with phone jacks. |
1956 IBM hard drive
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1956 IBM hard drive
wrote in message ... On Tue, 4 Dec 2007 17:09:22 -0500, "D.Duck" wrote: The IBM 350 disk system stored 5 million 8-bit (7-bits plus 1 odd parity bit) characters (about 4.4 MB). http://en.wikipedia.org/wiki/IBM_305 Somebody needs to fix the Wiki. It was 7 bits (remember the "odd parity"?) The bits are 1, 2, 4, 6, A, B and parity. It goes with "7 track tape" etc. The most popular military teletype machines (Mod 28 ASR33) were 7 bit ASCI with an 8th parity or "stop" bit. Eisboch Eisboch |
1956 IBM hard drive
"Short Wave Sportfishing" wrote in message ... On Tue, 04 Dec 2007 20:22:06 -0500, Wayne.B wrote: On Tue, 04 Dec 2007 23:13:55 GMT, Short Wave Sportfishing wrote: My first computer had a paper tape reader and I had to cold start boot strap it. The first computer I ever programmed was like that: Summer of 1967, Control Data 160A, 4K 12 bit words, as big as a large desk, cost approx $80K, paper tape in, paper tape out, environmental requirements: 72 degrees F +/- 2 degrees, 50% humidity +/- 10%. We copied the cold boot tape onto metalic mylar to keep it from wearing out quite as fast. Bear in mind that $80K then was like $500K now. Surprisingly enough we actually got some useful work out of the machine and I launched my entire adult career with it. Technically, I suppose my first "personal" compuer was an original Roberts calculator kit. One of the AF Captains in the survival course at Kessler knew him and we got to talking and he obtained one for me. Pretty cool deal. Next up was an Altair 8800 when I went to work for DG - basically the front panel was a duplicate of the original Nova computer. I know I've told the story about programming the computer at Sylvania with phone jacks. My first computer was an NCR 315 series mainframe. Paper tape, cards in and out, as well as tape drives and CRAM units. Mag Card Random Access Memory units. RCA tried to copy it with RACE and IBM tried the Data Cell. CRAM was the only one that really worked. 256 magnetic cards that you could select any one and have it read and write. 10,000 addresses. Not 10K binary, decimal 10K of 12 bit memory. Usable as 3 hex characters or 2 6 bit characters which allowed for printing uppercase and special characters on a drum printer. NCR sent to to 36 weeks of paid school to repair and program it. About $110,000 in 1964 dollars. |
1956 IBM hard drive
"Short Wave Sportfishing" wrote in message ... On Tue, 4 Dec 2007 08:29:22 -0500, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. If I remember correctly, the ones that DEC and DG built used head motors that weighed 160 pounds and were made out of cast aluminum. Damned things were bigger than washing macines. Motors were not that heavy. But the voice coil magnets were about 15 pounds. Still have a couple of them stuck to the side of the tool chest. |
1956 IBM hard drive
wrote:
On Wed, 05 Dec 2007 02:50:25 GMT, Short Wave Sportfishing wrote: On Tue, 4 Dec 2007 08:29:22 -0500, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. If I remember correctly, the ones that DEC and DG built used head motors that weighed 160 pounds and were made out of cast aluminum. Damned things were bigger than washing macines. I still have one of the multi-platter disk packs for my old CDC 300 megabyte "washtub". The pack alone weighs about 40 or 50 pounds. The matching 300 megabyte winchester drives in the PDP11's took two people to install. One to power lift the drive, and a second to guide it onto the rails. The CDC required head re-alignment of all of those heads every few months. It was quite a chore. Head crashes then are today's operation. I remember the screech of 2314's and 3330's when the heads crashed and then the crying of the operators. Not a pretty sight. Today the heads rid on the disks. Amazing! |
1956 IBM hard drive
"Eisboch" wrote in message ... wrote in message ... On Tue, 4 Dec 2007 17:09:22 -0500, "D.Duck" wrote: The IBM 350 disk system stored 5 million 8-bit (7-bits plus 1 odd parity bit) characters (about 4.4 MB). http://en.wikipedia.org/wiki/IBM_305 Somebody needs to fix the Wiki. It was 7 bits (remember the "odd parity"?) The bits are 1, 2, 4, 6, A, B and parity. It goes with "7 track tape" etc. The most popular military teletype machines (Mod 28 ASR33) were 7 bit ASCI with an 8th parity or "stop" bit. Eisboch Eisboch Model 28 is 5 bit and Model 33 is 8 bit. In the 8 bit ASCII code the 8th bit is the parity bit. The stop bit is usually two bits in length and was in incorporated to help "synchronize" the sending and receiving terminals. |
1956 IBM hard drive
On Dec 4, 9:23 pm, Short Wave Sportfishing wrote:
On Tue, 04 Dec 2007 20:22:06 -0500, Wayne.B wrote: On Tue, 04 Dec 2007 23:13:55 GMT, Short Wave Sportfishing wrote: My first computer had a paper tape reader and I had to cold start boot strap it. The first computer I ever programmed was like that: Summer of 1967, Control Data 160A, 4K 12 bit words, as big as a large desk, cost approx $80K, paper tape in, paper tape out, environmental requirements: 72 degrees F +/- 2 degrees, 50% humidity +/- 10%. We copied the cold boot tape onto metalic mylar to keep it from wearing out quite as fast. Bear in mind that $80K then was like $500K now. Surprisingly enough we actually got some useful work out of the machine and I launched my entire adult career with it. Technically, I suppose my first "personal" compuer was an original Roberts calculator kit. One of the AF Captains in the survival course at Kessler knew him and we got to talking and he obtained one for me. Pretty cool deal. Next up was an Altair 8800 when I went to work for DG - basically the front panel was a duplicate of the original Nova computer. I know I've told the story about programming the computer at Sylvania with phone jacks.- Hide quoted text - - Show quoted text - I remember my brother was going to school and bought a calculator for his electronics and math courses. It was a TI and he payed something like $150 for it. I thought it was amazing because it would do square roots! Of course, it took him a long time to trust it, he'd check it with his slide rule. I learned to use his slide rule while I was in high school, never forgot, although by the time I got to college, calculators had come a long way, although I will never forget the day I got my first HP 48G. |
1956 IBM hard drive
wrote in message ... On Tue, 4 Dec 2007 23:27:19 -0500, "Eisboch" wrote: wrote in message . .. On Tue, 4 Dec 2007 17:09:22 -0500, "D.Duck" wrote: The IBM 350 disk system stored 5 million 8-bit (7-bits plus 1 odd parity bit) characters (about 4.4 MB). http://en.wikipedia.org/wiki/IBM_305 Somebody needs to fix the Wiki. It was 7 bits (remember the "odd parity"?) The bits are 1, 2, 4, 6, A, B and parity. It goes with "7 track tape" etc. The most popular military teletype machines (Mod 28 ASR33) were 7 bit ASCI with an 8th parity or "stop" bit. Eisboch Eisboch This wasn't ASCII, it was Binary Coded Decimal. The problem with even parity is a "blank" is even. All IBM machines used some varient of BCD before the 360 and "hex" That was a typo above bits are 1, 2, 4, 8, A, B parity. Maybe you're right ... it's been a long time. I seem to remember though being taught that the military teletype machines that I worked on were 100 wpm (or maybe it was 110 wpm), 8 bit ASCII. Several machines would be running in the radio shack copying several channels of an multiplexed fleet broadcast. I used to have a manual that I "borrowed" but I haven't seen it in years. I *do* have a little card that the Navy awarded you when you graduated from the school in Norfolk. It has your name, date, and confers the title of "Doctor of Teletype Technology". :-) I am probably wrong, but that's what I remember. Eisboch |
1956 IBM hard drive
wrote in message ... On Tue, 4 Dec 2007 23:27:19 -0500, "Eisboch" wrote: wrote in message . .. On Tue, 4 Dec 2007 17:09:22 -0500, "D.Duck" wrote: The IBM 350 disk system stored 5 million 8-bit (7-bits plus 1 odd parity bit) characters (about 4.4 MB). http://en.wikipedia.org/wiki/IBM_305 Somebody needs to fix the Wiki. It was 7 bits (remember the "odd parity"?) The bits are 1, 2, 4, 6, A, B and parity. It goes with "7 track tape" etc. The most popular military teletype machines (Mod 28 ASR33) were 7 bit ASCI with an 8th parity or "stop" bit. Eisboch Eisboch This wasn't ASCII, it was Binary Coded Decimal. The problem with even parity is a "blank" is even. All IBM machines used some varient of BCD before the 360 and "hex" That was a typo above bits are 1, 2, 4, 8, A, B parity. I think the confusion here is comparing the Teletype machines and the IBM machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model 33/35 is 8 bit ASCII. |
1956 IBM hard drive
On Wed, 5 Dec 2007 08:52:20 -0500, "D.Duck" wrote:
I think the confusion here is comparing the Teletype machines and the IBM machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model 33/35 is 8 bit ASCII. That's my recollection also. The model 28s used a "mode shift" key or some such to effectively double the character set. If the "mode shift" code arrived garbled, the receiving machine would miss everything that followed and print gibberish. |
1956 IBM hard drive
"Wayne.B" wrote in message ... On Wed, 5 Dec 2007 08:52:20 -0500, "D.Duck" wrote: I think the confusion here is comparing the Teletype machines and the IBM machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model 33/35 is 8 bit ASCII. That's my recollection also. The model 28s used a "mode shift" key or some such to effectively double the character set. If the "mode shift" code arrived garbled, the receiving machine would miss everything that followed and print gibberish. For such a mechanical contraption, they were amazing. http://video.google.com/videoplay?do...544&q=mod-tage Eisboch |
1956 IBM hard drive
"Eisboch" wrote in message ... "Wayne.B" wrote in message ... On Wed, 5 Dec 2007 08:52:20 -0500, "D.Duck" wrote: I think the confusion here is comparing the Teletype machines and the IBM machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model 33/35 is 8 bit ASCII. That's my recollection also. The model 28s used a "mode shift" key or some such to effectively double the character set. If the "mode shift" code arrived garbled, the receiving machine would miss everything that followed and print gibberish. For such a mechanical contraption, they were amazing. http://video.google.com/videoplay?do...544&q=mod-tage Eisboch Still remember the first KSR-33 I ever saw. Was working in the Western Electric Warehouse when the forklift operator got a pallet with one off the top of the storage racks. Someone had not strapped down the unit, and the top of the rack must have been 25' in the air. That KSR33 nosedived to the floor and parts went everywhere. Later when I had to work on the Teletype that NCR used as the console writer on the later Century systems, I wanted to drop more of them 25'. They used the light duty model, forget the number, that was designed to receive 3-4 messages a day and only turned on when a message came in. NCR ran them 24/7 and the shafts eventually were cut almost in half by the oillite busings wearing out. |
1956 IBM hard drive
"Calif Bill" wrote in message ... "Eisboch" wrote in message ... "Wayne.B" wrote in message ... On Wed, 5 Dec 2007 08:52:20 -0500, "D.Duck" wrote: I think the confusion here is comparing the Teletype machines and the IBM machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model 33/35 is 8 bit ASCII. That's my recollection also. The model 28s used a "mode shift" key or some such to effectively double the character set. If the "mode shift" code arrived garbled, the receiving machine would miss everything that followed and print gibberish. For such a mechanical contraption, they were amazing. http://video.google.com/videoplay?do...544&q=mod-tage Eisboch Still remember the first KSR-33 I ever saw. Was working in the Western Electric Warehouse when the forklift operator got a pallet with one off the top of the storage racks. Someone had not strapped down the unit, and the top of the rack must have been 25' in the air. That KSR33 nosedived to the floor and parts went everywhere. Later when I had to work on the Teletype that NCR used as the console writer on the later Century systems, I wanted to drop more of them 25'. They used the light duty model, forget the number, that was designed to receive 3-4 messages a day and only turned on when a message came in. NCR ran them 24/7 and the shafts eventually were cut almost in half by the oillite busings wearing out. That 300 Megabyte DEC drive the RM05 was a CDC build drive. The RM03 was a smaller version. When I was an engineer for System Industries we sold the drive as a CDC 300 MB drive and disk controllers that looked just like the DEC controllers software wise. Plus we could hook several systems up to the same controller for shared data. |
1956 IBM hard drive
On Wed, 5 Dec 2007 10:04:05 -0500, "Eisboch" wrote:
For such a mechanical contraption, they were amazing. http://video.google.com/videoplay?do...544&q=mod-tage That certainly brings back some memories. You can almost smell that oil they all used. It had a peculiar pungent odor. I think they were amazing *because* they were a mechanical contraption, somewhere near the apex of the complex electro-mechanical era. You could actually look at them and get a sense of how they worked (or not), and the number of precisely synchronized moving parts was astounding. |
1956 IBM hard drive
"Calif Bill" wrote in message ... wrote in message ... On Tue, 4 Dec 2007 08:29:22 -0500, "Eisboch" wrote: http://www.neatorama.com/images/2006...puter-1956.jpg In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive(HDD). The HDD weighed over a ton and stored 5MB of data. That's not a typo ..... 5MB of data. Eisboch We still had a 305 running at the Bureau of Standards in Germantown Md when I started with IBM in 1966. I remember at the Fall Joint Computer Conference in San Francisco in 1966 where they added another disk to the IBM drum memory each day. Difference from the modern disk drive is they had fixed heads, not a moving arm. no disks on a drum. bada boom. there were fixed head disks, moving head disks, drums. And data cells and tapes |
1956 IBM hard drive
wrote in message ... On Wed, 5 Dec 2007 22:58:48 -0600, "Del Cecchi" wrote: I remember at the Fall Joint Computer Conference in San Francisco in 1966 where they added another disk to the IBM drum memory each day. Difference from the modern disk drive is they had fixed heads, not a moving arm. no disks on a drum. bada boom. there were fixed head disks, moving head disks, drums. And data cells and tapes He is probably talking about a 2305. Everyone called it a drum but it was really a fixed head disk drive yup. |
1956 IBM hard drive
wrote in message ... On Wed, 5 Dec 2007 22:58:48 -0600, "Del Cecchi" wrote: I remember at the Fall Joint Computer Conference in San Francisco in 1966 where they added another disk to the IBM drum memory each day. Difference from the modern disk drive is they had fixed heads, not a moving arm. no disks on a drum. bada boom. there were fixed head disks, moving head disks, drums. And data cells and tapes He is probably talking about a 2305. Everyone called it a drum but it was really a fixed head disk drive Highschool buddy retired as a regional specialist for IBM. He said they went to the Smithsonian Tech Museum and almost all the machines there he worked on. Figured out he was old. From the O24/026 on up. |
1956 IBM hard drive
On Wed, 05 Dec 2007 23:33:52 -0500, wrote:
I guess you never saw a 407 accounting machine with the covers off. That was some moving parts http://www.columbia.edu/acis/history/407.html We had 5 of them at NIH and a whole lot more scattered around Montgomery County that I got to work on. You're right, the EAMs and their wiring boards were a little ahead of my time. |
1956 IBM hard drive
wrote in message ... On Thu, 06 Dec 2007 05:35:26 -0500, Wayne.B wrote: I finally nailed it in Decatur Alabama. It was software. Bug in the print spooler. A 167 year old girl who worked there gave me the clue I needed Who gave her the clue, Ben Franklin? :-) Eisboch |
1956 IBM hard drive
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1956 IBM hard drive
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1956 IBM hard drive
wrote in message ... On Fri, 7 Dec 2007 02:36:12 -0500, "Eisboch" wrote: spooler. A 167 year old girl who worked there gave me the clue I needed Who gave her the clue, Ben Franklin? :-) Sorry that was supposed to be 16-17. I figured that. I was just trying to be funny. Eisboch |
1956 IBM hard drive
wrote in message ... On Fri, 07 Dec 2007 06:01:46 -0500, Wayne.B wrote: On Fri, 07 Dec 2007 02:01:34 -0500, wrote: I really liked the cash register business the best, just because it got me out and around dealing with real people (not the dweebs you deal with in glass house computer rooms). Careful now. :-) I know, I used to be one of those dweebs. ;-) I always had the argument with the other "big system" CEs who thought cash registers were beneath them. I had to point out that when they were at a Wendys they should look around. There is nobody there working less than them and they are all working for a lot less money. "Just to your damn job and be happy about it". They didn't have to work in a resident territory. They could move to Tampa and be in the computer room all day. I was also happy to point out that if this stuff is so far beneath them, why is it kicking their ass? Spend a weekend in an ATM vault with a security guard, the bank rep, 10 pieces of test equipmemt and the Telco guy, trying to fix a communication problem and you figure out this little stuff isn't that easy after all. BTW I think the most impressive mechanical machine is a 3890 check sorter. We had 3 of them at C&S (and the other three or four names the place had) That was where the sheriff is now on 6 mile. That sucker ran about 2600 six inch checks a minute, sorted into one of 30 (up to 36) poclets and along the way it rolled an endorsement on the back, took pictures of both sides and ****ed a number on the back with an ink jet printer. They used a 360 model 25 for the controller (later replaced with a PS/2 mod 80) My favorite box was a 3800 laser printer. We only had 3 in Ft Myers but in DC there were almost 100. the better sorter for handling the checks was the NCR 407. The better reader was the IBM. B of A used the IBM's for the online reading and the NCR sorters for the offline reading. Loved the 3800 style printer. First engineering job after I finished college was with Itel, and were were building an interface to a Siemens ND2 printer to make it look like the 3800. I did the disassembly of the IBM channel diagnostics to figure what we needed to send back to the mainframe when diags were run. Lots of undocumented channel commands. We used a DEC PDP-34 as the channel controller. Fun job. Just before they laid of 2300 of us when the residual values of the 360 crashed with the release of the H series systems, I was about 50% through writing a program to take a plotter input tape and convert it to print on the 3800. The plotter table took 2 days to draw a plot that I could print in about 30 seconds. |
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