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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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 Posted: Wed Sep 20, 2006 11:12 am Post subject: World's 1st bit-slice CPU |
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Name the chip, who made it, and the year it was introduced. (Should be fairly easy, but you might be surprised.  )
- CMW |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Wed Sep 20, 2006 12:01 pm Post subject: |
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Nope.  Not by a long shot.
Anyone else?
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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| Posted: Wed Sep 20, 2006 1:16 pm Post subject: |
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| chip68 wrote: | Nope. Not by a long shot.
Anyone else?
- CMW |
so there is an ebay auction online at this moment with a false description...
| Quote: | | The IMP MM5750 (MOS/LSI register and arithmetic logic unit (RALU)) is significant because is the first BIT-SLICE Microprocessor, predating the Intel C3002 and AMD's 2901, and was first introduced in 1973. The RALU can be arranged in a parallel array 8 slices wide to achieve 32-bits, runs at a clock speed of ~700kHz, and contains 7 general purpose registers. |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Wed Sep 20, 2006 1:42 pm Post subject: |
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| Four-Phase Systems AL1, 1970 |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Wed Sep 20, 2006 1:48 pm Post subject: |
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| Elar wrote: | | Four-Phase Systems AL1, 1970 |
Nope, even earlier than that.
- CMW |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Wed Sep 20, 2006 1:55 pm Post subject: |
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| Fairchild 3800 then maybe. |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Wed Sep 20, 2006 2:00 pm Post subject: |
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John and Elar get the prize! Here's another correct answer, and note the date:
The 3800 was an 8-bit CPU slice/RALU. Both were introduced in Q1 of 1969, although I have a 1968 Fairchild brochure somewhere that shows a complete 12-bit 3804 system in block diagram form.
Mixeur, you should've checked the forum archive instead. I'm pretty sure I mentioned those here before. Good answers, though. I already wrote the seller in that IMP-00A auction and told him that his facts are off. Looks like he got his information from here:
http://www.antiquetech.com/chips/NSIMP-16.htm
- CMW |
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Wed Sep 20, 2006 2:50 pm Post subject: |
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This seller is what I call an Epigone, the son of someone.
So he doesn't have the knowledge, he just has the chips.
OK, I didn't even invent them:-)
Chris, do you have a picture of such a chip?
What kind of package was it? DIP40 with four unused pins?
or a strange 36 pin somewhat? |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Wed Sep 20, 2006 4:15 pm Post subject: |
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| wepwawet wrote: | This seller is what I call an Epigone, the son of someone.
So he doesn't have the knowledge, he just has the chips.
OK, I didn't even invent them:-) |
Yeah, his dad was George Morrow, a pretty famous and influential guy in the microcomputer world. I'm sure he's inherited some knowledge from his father... And I wouldn't necessarily expect him to be familiar with a lot of the finer points of semiconductor history.
I'm more annoyed by this prevailing tendency for sellers to lift text from other auctions or web sites without giving credit (or getting permission). That's just not cool, and it ends up making the person look bad - especially if what's being plagiarized isn't even true.
| wepwawet wrote: | Chris, do you have a picture of such a chip?
What kind of package was it? DIP40 with four unused pins?
or a strange 36 pin somewhat? |
It's a 36-pin white inverted CERDIP with the lid on the bottom and pins bonded underneath:
I've been looking for a 3800 or 3804 for years, to no avail.
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Wed Sep 20, 2006 4:26 pm Post subject: |
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| CPUShack wrote: | | at least a 40 DIP, as it needs more the 36 (has to have power and ground, and back then, that was often multiple voltages) |
No, 36, with just VGG and GND in the case of the 3804 - pins 19 and 31, shown above. Both the 3800 and 3804 run on 27V; the 3800 also needs a separate 13V supply.
- CMW |
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