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On Sun, 18 May 2008 20:50:57 -0500, in a place far, far away, "Jorge
R. Frank" made the phosphor on my monitor glow in such a way as to indicate that: OK, took me too long to catch on, triba_la_raza is a loon. That was actually easily inferable from teh screen name. I mean, "the tribe of the race"? Come on... |
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On Sun, 18 May 2008 20:50:57 -0500, "Jorge R. Frank"
wrote: OK, took me too long to catch on, triba_la_raza is a loon. Easy to fix. Yup, he got plonked here after a couple of lines ![]() Dale |
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the article stated that DOS was used stupid.
If it so did, it didn't know what it was talking about. DOS was an operating system for the first S/360 systems 8-). People often claim MS DOS was used when what they really mean is the file system that MS DOS introduced to the PC, i.e., FAT16 or its successor FAT32. WNT, Linux et al. will all happily read and write such a file system, with no involvement of whatever DOS. Jan |
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On May 18, 7:47*pm, wrote:
On May 10, 4:36*pm, "Jorge R. Frank" wrote: Jorge R. Frank wrote: Brian Thorn wrote: On Sat, 10 May 2008 11:32:03 -0500, "Jorge R. Frank" wrote: James Of Tucson wrote: At one time, the GPCs were based on a Motorola 68000, but a special one that was designed for the space program. That one ran OS-9. *It was actually the second generation GPC, in 84. No. The GPCs have always been from the IBM AP-101 family. They started out as AP-101B and were upgraded to AP-101S starting in 1991.. The S has more memory and has the IOP integrated into the CPU, while the B had separate CPUs and IOPs. IIRC, 68000s did turn up in the updated Main Engine Controllers circa 1990. I had an Amiga at the time and was impressed that some part of the Shuttle was also now using the 68000. Hmm, right you are. Jenkins says the Block II MECs were certified in 1991 (p. 416) but does not mention that it used a 68000. That bit of info is in /Computers in Spaceflight: The NASA Experience/, however. It is also probably worth pointing out that there are other "computers" on the shuttle that are more powerful than the GPCs. The MEDS IDPs are Intel 386-based, and the MEDS MDUs have RISC processors, for example.- Hide quoted text - - Show quoted text - RISC processors are called that for a reason. *they are ****, and are very risky. *yet another 'tribute' to the evil, vacuous IBM IBM invented RISC? I thought it was DEC? |
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In sci.space.history Eric Chomko wrote:
RISC processors are called that for a reason. ?they are ****, and are very risky. ?yet another 'tribute' to the evil, vacuous IBM IBM invented RISC? I thought it was DEC? I am reasonably confident that DEC did not invent RISC. I'm not sure if IBM invented the concept of RISC, but they did have an early RISC processor - the 801 IIRC. It was in the IBM "PC-RT" which those enough "fortunate" to be at CMU ca 1984-1988 could use as an "Andrew" workstation. They were generally third in preference among users (well at least me, based on performance) behind Sun 3/80's and DEC MicroVax II's. When HP started marketing PA-RISC ca 1986 they were calling it HP-PA - Hewlett-Packard Precision Architecture - I'm told because people indeed considered "RISC" risky. After RISC was established, it was then called PA-RISC for Precision Architecture RISC. rick jones -- The computing industry isn't as much a game of "Follow The Leader" as it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose." - Rick Jones these opinions are mine, all mine; HP might not want them anyway... ![]() feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... |
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Rick Jones wrote:
:In sci.space.history Eric Chomko wrote: : RISC processors are called that for a reason. ?they are ****, and : are very risky. ?yet another 'tribute' to the evil, vacuous IBM : : IBM invented RISC? I thought it was DEC? : :I am reasonably confident that DEC did not invent RISC. I'm not sure :if IBM invented the concept of RISC, but they did have an early RISC ![]() : RISC was sort of invented in two places at about the same time. One of those places was Building 801 at IBM's T.J. Watson Research Center. The other was under a DARPA program at UC Berkeley. Both of these occurred around 1980 or so. : :It was in the IBM "PC-RT" which those enough :"fortunate" to be at CMU ca 1984-1988 could use as an "Andrew" :workstation. : No, that was a different processor. I think that one was the RS/6000. -- "The reasonable man adapts himself to the world; the unreasonable man persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man." --George Bernard Shaw |
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On Sat, 24 May 2008 00:05:16 +0000 (UTC), Rick Jones
wrote: I am reasonably confident that DEC did not invent RISC. I'm not sure if IBM invented the concept of RISC, but they did have an early RISC processor - the 801 IIRC. It was in the IBM "PC-RT" which those enough "fortunate" to be at CMU ca 1984-1988 could use as an "Andrew" workstation. They were generally third in preference among users (well at least me, based on performance) behind Sun 3/80's and DEC MicroVax II's. ....From http://en.wikipedia.org/wiki/Risc#Early_RISC : "The first system that would today be known as RISC was not at the time; it was the CDC 6600 supercomputer, designed in 1964 by Jim Thornton and Seymour Cray. Thornton and Cray designed it as a number-crunching CPU (with 74 opcodes, compared with a 8086's 400) plus 12 simple computers called "peripheral processors" to handle I/O and most other operating system functions. The CDC 6600 had a load-store architecture with only two addressing modes (register+register, and register+immediate constant). There were eleven pipelined functional units for arithmetic and logic, plus five load units and two store units (the memory had multiple banks so all load-store units could operate at the same time). The basic clock cycle/instruction issue rate was 10 times faster than the memory access time. Another early load-store machine was the Data General Nova minicomputer, designed in 1968. The earliest attempt to make a chip-based RISC CPU was a project at IBM which started in 1975. Named after the building where the project ran, the work led to the IBM 801 CPU family which was used widely inside IBM hardware. The 801 was eventually produced in a single-chip form as the ROMP in 1981, which stood for Research OPD [Office Products Division] Mini Processor. As the name implies, this CPU was designed for "mini" tasks, and when IBM released the IBM RT-PC based on the design in 1986, the performance was not acceptable. Nevertheless the 801 inspired several research projects, including new ones at IBM that would eventually lead to their POWER system. The most public RISC designs, however, were the results of university research programs run with funding from the DARPA VLSI Program. The VLSI Program, practically unknown today, led to a huge number of advances in chip design, fabrication, and even computer graphics." ....The bit about RISC essentially originating with the "Cyber" jives with what I was taught back in '76 when I first got indoctrinated into what we of my High School's "Brain Trust" were getting into when we were given accounts to access Texas University's CDC-6600. The catch is that we were told the term "reduced instruction set", but the acronym apparently came later. Of course, we were doing BASIC and Minnesota Northstar Fortran IV in those days, so any reduction in our instruction sets involved trying to code as fast as we could to keep the dial-up costs down to a semi-minimum :-P Ironically, I wouldn't hear the term RISC mentioned again in a computer class until 1985 in a Pascal class, when bimbo-emeritus "Dr." Nell Dale tried to claim top-down design would make RISC easier and Pascal the language that would make BASIC and C obsolete. Pushing bull**** like that explains why it wasn't until she retired from teaching that Texas U's CS degree was finally accredited with a BS as opposed to the BA founded on pure BS that it had been for years. OM -- ]=====================================[ ] OMBlog - http://www.io.com/~o_m/omworld [ ] Let's face it: Sometimes you *need* [ ] an obnoxious opinion in your day! [ ]=====================================[ |
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In article ,
says... On Sat, 24 May 2008 00:05:16 +0000 (UTC), Rick Jones wrote: I am reasonably confident that DEC did not invent RISC. I'm not sure if IBM invented the concept of RISC, RISC was one of those "in the air" concepts that several groups invented independently. Probably the best candidate for first inventor is David Paterson of UC/Berkeley. If nothing else, he was the guy who coined the name RISC. In addition to inventing the current style of CPUs, Paterson also invented the current style of high-performance disk systems: RAID. He's also responsible for the "smart disk" style that has made Netezza successful. "The first system that would today be known as RISC was not at the time; it was the CDC 6600 supercomputer, designed in 1964 by Jim Thornton and Seymour Cray. [...] Another early load-store machine was the Data General Nova minicomputer, designed in 1968. Early, but not first. The PDP-5 predated not just the Nova but also the CDC-6600. The -5 has an even more reduced instruction set than the CDC -- just eight opcodes. An updated version of the -5 was the PDP-8. The head engineer of the -8 quit DEC to found Data General where he (Edson d'Castro) designed the Nova. So the Nova, although a RISC machine, wasn't the first of the kind. DEC has a clear claim to early RISC machine with the -5, although you can spend way too much time debating the details of the definition of RISC. There is something ironic about the fact that the two most notable RISC machines were both the smallest, slowest, cheapest computer (PDP-5/8) of its era, and the biggest, baddest, fastest computer of its era (CDC). Even better: these two machines were the first two computers I ever programmed. -- Kevin Willoughby lid Kansas City, this was Air Force One. Will you change our call sign to SAM 27000? -- Col. Ralph Albertazzie |
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![]() "Kevin Willoughby" wrote in message . .. Even better: these two machines were the first two computers I ever programmed. My electronics instructor kept copies of his favorite subroutines on the wall- in paper tape. ** Posted from http://www.teranews.com ** |
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