test-drb January 1999

test-drb@ccmp.vtda.org

189 participants
897 discussions

AMD 9511, 9512, Intel 8231, 8232 wanted, will trade National MM57109

by edick＠idcomm.com

The 9511 was the floating point unit, and the 9512 was for 64-bit integer arithmetic, I believe. I've actually got one of each of these from back in the old days. They were sort of a calculator for your computer, in that they could be operated faster than the cpu could perform the function . . . MUCH faster. Dick ---------- > From: Tony Duell <ard(a)p850ug1.demon.co.uk> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: AMD 9511, 9512, Intel 8231, 8232 wanted, will trade National MM57109 > Date: Tuesday, January 26, 1999 4:33 PM > > > > > > optional 9512 Floating Point (remember these?) > > > > Speaking of which, if anyone has any 9511 or 9512 chips, or the equivalent > > Intel 8231 or 8232, I'd like to get at least one of each. > > Speaking of which (:-)), does anyone else remember a 9511 card for the > Apple ][. I found one in a pile of boards that were being thrown out, > along with the manual (including schematic), but without any software. > > -tony

25 years, 10 months

Ohio Scientific box

by cmcmanis＠mcmanis.com

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=55598937 On Ebay. Not one of the "interesting" ones but rare none-the-less. --Chuck

25 years, 10 months

AMD 9511, 9512, Intel 8231, 8232 wanted, will tradeNational MM57109

by edick＠idcomm.com

You're absolutely correct . . . I actually got out my old AMD MOS Microprocessors and Peripherals data book from 1985, and found that the 9511 is a stack oriented (like the HP calculators, I guess) arithmetic processor capable of 16 and 32-bit floating point operations, while the 9512 is capable of 32 and 64-bit operations. The 9511, it seems is capable of many more functions, being somewhat reminiscent of a "scientific" calculator, while the 9512 is capable of none of the transcendental functions which the 9511 supports. Both are stack-oriented, therefore ideal for RPN implementation. My steel-trap mind moves closer and closer every day to being a sievel . . oh, well . . . it's HELL getting old. Dick ---------- > From: Gary Oliver <go(a)ao.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: AMD 9511, 9512, Intel 8231, 8232 wanted, will tradeNational MM57109 > Date: Wednesday, January 27, 1999 12:36 PM > > >From my copy of "Floating Point Program Manual Am9511A/Am9512:" > > Am9511A Arithmetic Processor > > Distinctive Characteristics > --------------------------- > 2,3 and 4 MHz operation > Fixed point 16 bit and 32 bit operations > Floating point 32 bit operations > Binary data formats > Add, Subtract, Multiply and Divide > Trigonometric and inverse trigonometric functions > Square roots, logarithms, exponentiation > Stack-oriented operand storage > ... > > Am9512 Floating Point Processor > > Distinctive Characteristics > --------------------------- > Single (32-bit) and double (64-bit) precision capability > Add, Subtract, Multiply and Divide > Compatible with proposed IEEE format > ... > > > The 9511 is very much like a calculator with a 32 bit operand > stack of up to four items. Operations work on the top or top > two items on the stack. Some operands (such as PUPI "push PI") > push a new item on the stack. > > At 4Mhz, a FADD takes (worst case) about 92 uSec and an FMUL > (worst case) at 42 uSeconds. Wasn't too shabby when software > took 5 to 10 times as long on a Z-80. Plus it was possible to > get some other work done while the 9511 was off crunching a > number or two. > > We still use the 9511 on an old (very old) legacy product, although > they will eventually disappear - AMD is certainly not making them > anymore and there are very few left on distributor shelves or even > in "part surplus" houses. > > Gary > > At 10:18 AM 1/27/99 -0700, you wrote: > >The 9511 was the floating point unit, and the 9512 was for 64-bit integer > >arithmetic, I believe. I've actually got one of each of these from back in > >the old days. They were sort of a calculator for your computer, in that > >they could be operated faster than the cpu could perform the function . . > >MUCH faster. > > > >Dick > > > > > >---------- >

25 years, 10 months

Gordon Bell computer books on-line

by joe＠barrera.org

>I've just come across a site that has on-line copies of several >of Gordon Bell's (with others) books on computer architecture, >etc. (My apologies if I'm repeating something, I don't recall >seeing this posted here recently though). > >A menu leading to the books is located at the following site: > >http://beta.ul.cs.cmu.edu/webRoot/Books/Saving_Bell_Books/ They are also available on http://research.microsoft.com/users/gbell/Pubs.htm -- along with a lot more modern stuff just in case you're wondering what Gordon is up to these days.

25 years, 10 months

Televideo 802 computer?

by rigdonj＠intellistar.net

Does anyone have one of these? I found a manual for one of these yesterday and it looks pretty cool. Joe

25 years, 10 months

Gordon Bell computer books on-line

by aknight＠mindspring.com

Hi, I've just come across a site that has on-line copies of several of Gordon Bell's (with others) books on computer architecture, etc. (My apologies if I'm repeating something, I don't recall seeing this posted here recently though). A menu leading to the books is located at the following site: http://beta.ul.cs.cmu.edu/webRoot/Books/Saving_Bell_Books/ The books that are available at this URL are: Computer Engineering Computer Structures: Readings and Examples Designing Computers and Digital Systems High Tech Ventures I was particularly interested in seeing the Computer Structures: book, as it had been previously noted here on the list that there was coverage of the HP9100 calculator. It turns out that the chapter in Bell's book is taken verbatim (with credit) from the HP Journal article that describes the HP9100, so there isn't any additional info. or analysis on the 9100 by Bell. There is a description of the Olivetti Programma 101 calculator/ computer in the same chapter though. And, of course, descriptions of many, many other early computer architectures. Enjoy! Alex Calculator History & Technology Archive Web Page http://aknight.home.mindspring.com/calc.htm

25 years, 10 months

Old DEC stuff

by mopar+＠pitt.edu

All, I have some old DEC equipment that I would like to get out of the garage. I would prefer if someone would take the whole lot. If I can't make those arrangements I may be willing to piece things out. The list is following my sig. Jerome -- Jerome A. Marella University of Pittsburgh - CIS Systems & Networks 600 Epsilon Drive, Pittsburgh, PA 15238 mopar+(a)pitt.edu (412) 624-9139 Fax (412) 624-6436 http://www.pitt.edu/~mopar The list of stuff: 2 x 11/750 w 14Meg an 11/730 in pieces 3 x RA81 tu78 tu80 various extra boards - I will make a complete list if anyone likes print sets: 11/730 field maintenance 11/750 pcs module ka750 mos memory array comet memory unit tu77

25 years, 10 months

TRW Swapmeet Wants/Trades

by allisonp＠world.std.com

<> You know, those 30-pin SIMMs will be valuable eventually! You should sav <> every one you find. < <I'm sure they're valuable now to people who have old 286 or 386 <motherboards that use old 30-pin SIMMs. What about all the 486 boards (I have a few!) that use 30pin simms. I also have a older Pentium board that take a mix of 30 pin and 72pin simms! I tried recently to get 4mx9 30 pin parts and 16mb(4 of them) would be about $65... 16mb 72pin parts are going for $19 around here new! Yet I can find the 1mx9 parts for $3 used/tested. I happen to have a very tiny 486slc/33 board that only can take 4simms (and must have 4!) so I either have 4mb or 16mb as choices. I need a minimum of 8mb so I can run useful stuff and a have just a few (dozen) 1mb parts! such is industry. Allison

25 years, 10 months

IBM PC-JX (was: Reiability of wrong media)

by guerney＠uq.net.au

Tony Duell said: >That sounds _very_ much like a PC-jr. It has connectors for audio and >composite video (RCA sockets) and BERG headers for RS232, 2 joysticks, >CGA (TTL RGBI) monitor, lightpen, cassette, keyboard. No printer port - >that was an optional 'sidecar' module. I think we have established now that this _is_ basically a PC-Jr ! Except: it has a different model number it is black it has a 3.5" disk in the main unit, not a 5.25" drive, and room for another it has a printer port on the back of the main unit (DB-25 type connector) the video ("display") port on the back of the main unit is a DB-15 type connector it was not sold in the USA I have not mentioned before that it does have the two cartridge ports in the same place under the floppy drive at the bottom of the main unit. Unless anyone else wants more details, that is all I expect anyone wants to know about the "JX". The only doubt about its designation that I have, is that it does not say "JX" (or anything other than IBM) on it anywhere! I have had one keen enquiry about the unit from a US collector, so unless the freight charges work out too much, and if the trade is a fair and interesting swap, it looks like it will have a new home. Phil

25 years, 10 months

DG Aviion input devices (was RE: HP Keyboard and cable)

by netcafe＠pirie.mtx.net.au

-----Original Message----- From: R. Stricklin (kjaeros) <red(a)bears.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, 27 January 1999 9:08 Subject: DG Aviion input devices (was RE: HP Keyboard and cable) >On Tue, 26 Jan 1999, Anthony Eros wrote: > >> I recently acquired a DG Aviion 410 minus keyboard and mouse. Does anyone >> have leads on tracking these items down? > >Apparently any number of (although not all) standard AT-style PC keyboards >will work with the machine. That is my experience also. A cheap clone keyboard didn't want to play, however, a genuine IBM AT Keyboard seems to work perfectly. >As far as mice go, mine looks like it's probably just a quadrature-style >mouse, although my Aviion isn't working yet and I can't verify this. >Note that for all their outward similarity, the DG mouse is not interchangable >with a Sun mouse. Erk. I was hoping they were. Darn. Anyone in Oz got a source for DG Aviion style mice??? Cheers Geoff Roberts Computer Room Internet Cafe Port Pirie South Australia. netcafe(a)pirie.mtx.net.au

25 years, 10 months

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test-drb January 1999