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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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 Posted: Wed May 27, 2020 12:31 pm Post subject: Help identify a CPU |
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I need an help to identify a CPU on a printed circuit board
There are 3 40pin chip, CPU, ROM, RAM, on pic.1 you can see a simple scheme of the circuit, 4 and 5 are shift registers, 6 I believe it's the cristal but I never seen one with a regolable screws on top.
I believe 1 it's the CPU and 2/3 ROM/RAM or RAM/ROM but prefer an opinin from an expert 
thanks
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frag_
Joined: 17 Nov 2008
Posts: 4015
Location: Estonia
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| Posted: Wed May 27, 2020 1:07 pm Post subject: |
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If this datasheet is related then 48 8-bit registers, 48 instructions, and this system is made by AEG-Telefunken, GI and SGS-Ates, all points to LP8000 or M380.
| isa-d wrote: | | regolable screws on top |
Where it is?
I suspect the first photo must be different +) |
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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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| Posted: Wed May 27, 2020 1:26 pm Post subject: |
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| frag_ wrote: | If this datasheet is related then 48 8-bit registers, 48 instructions, and this system is made by AEG-Telefunken, GI and SGS-Ates, all points to LP8000 or M380.
| isa-d wrote: | | regolable screws on top |
Where it is?
I suspect the first photo must be different +) |
It's an AEG-Telefunken CP 3-F board (and I'm sure of that) but chips are marked with custom part numbers
the only component which seem to be a cristal it's this metal can things with the screw on top
 where is the closest suntrust bank |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Wed May 27, 2020 1:44 pm Post subject: |
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That looks like a variable inductor to me. It will be fine tuned alongside on or more of the capacitors to generate a signal.
I'm remembering this from classes 40 years ago though, so may be wrong.
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Debs |
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