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AARON73
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 Posted: Wed May 02, 2012 11:11 pm Post subject: Help identifying a chip AMI 1820-2122-A 40 pin |
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I'm trying to find out what kind of chip I have, I pulled it from a spice series HP calculator circa 1979 model 37-E. It says AMI on one corner of the chip, then its says
7907VR 1820-2122-A Korea. I cant find anything about this chip, any help would be great. Thanks in advance.
Also trying to find a datasheet for the part |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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AARON73
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| Posted: Thu May 03, 2012 12:02 am Post subject: |
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Do you know where to get the datasheet for this chip.
I've been to both those hyperlinks before and could not find any info on where to get a datasheet. None of the main datasheet sites have anything I've tried about ten different datasheet places. Any answers possibly? Thanks for the reply. Major
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Thu May 03, 2012 12:13 am Post subject: |
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Dont think I have ever seen a datasheet for a HP house Number IC
so if custom part.. any datasheet would be only a internal HP document
the best you could do it try and find an internal HP repair manual for the calculator.
These repair manuals normally give schematics, pinouts & some details of custom parts.
If on the off chance it is not a custom part.. then a datasheet for the stand part would suffice.
but as I said.. this house number is jumped in the few lookup lists I have and this means that they are normally a custom part
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magictom
Joined: 14 May 2009
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Location: Hawaii
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| Posted: Thu May 03, 2012 12:58 am Post subject: |
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| AARON73 wrote: | Do you know where to get the datasheet for this chip.
I've been to both those hyperlinks before and could not find any info on where to get a datasheet. None of the main datasheet sites have anything I've tried about ten different datasheet places. Any answers possibly? Thanks for the reply. Major
Headaches! |
What exactly are you trying to do? I agree with Neon_WA that most likely there's no data sheet. |
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AARON73
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| Posted: Thu May 03, 2012 1:04 am Post subject: |
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| Do you know where to get a HP-37E schematics/repair manual?Thanks again for the response. |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Thu May 03, 2012 1:22 am Post subject: |
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only can see user manuals around.. best ask in vintage HP forum if any of the retired service agents have a copy
also.. the 1820-2122-A is listed for the 38E.. so maybe your 37E is a late model as it normally has a 1820-2122
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There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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jrmunro
Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada
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| Posted: Thu May 03, 2012 2:34 am Post subject: |
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| Post a picture of the chip. |
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jrmunro
Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada
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| Posted: Fri May 04, 2012 12:26 am Post subject: |
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| The poster sent me a pic. It`s not that clear. It might be an S6800 or some other 680x |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Fri May 04, 2012 12:31 am Post subject: |
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strange the way the pins have been bent to solder onto the board rather than solder through
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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isa-d
Joined: 16 Aug 2006
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Location: Italy
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| Posted: Fri May 04, 2012 5:38 am Post subject: |
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Different code but the same CPU
it was't soldered on the board |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Fri May 04, 2012 6:21 am Post subject: |
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| isa-d wrote: | | Different code but the same CPU |
1818-0078 is listed as a CTC either AMI or Mostek MK6021P
If 1820-2122-A is not a custom processor.. most likely a 6800
http://www.chipdb.org/cat-680x-1167.htm
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There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html
Last edited by Neon_WA on Fri May 04, 2012 6:35 am; edited 1 time in total |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Fri May 04, 2012 6:34 am Post subject: |
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| Neon_WA wrote: | | strange the way the pins have been bent to solder onto the board rather than solder through |
Early models of this calculator didn't use soldered down chips, instead press fit was used.
http://www.hpmuseum.org/tech30.htm |
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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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| Posted: Fri May 04, 2012 11:56 am Post subject: |
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| Quote: | | 1818-0078 is listed as a CTC either AMI or Mostek MK6021P |
Yes I know, I mean the 1MA4 0003 was the same like AMI 1820-2122
this is the picture of the whole box
if someone is interested to the Focus CPU, contact me shortly |
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bccwchan
Joined: 20 Sep 2004
Posts: 2585
Location: Hong Kong
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| Posted: Sun May 06, 2012 8:06 am Post subject: |
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| isa-d wrote: | | Quote: | | 1818-0078 is listed as a CTC either AMI or Mostek MK6021P |
Yes I know, I mean the 1MA4 0003 was the same like AMI 1820-2122
this is the picture of the whole box
if someone is interested to the Focus CPU, contact me shortly |
You have PM. |
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