[sdiy] Chip ID

[Batz Goodfortune]

Y-ellow all.

At 06:00 PM 5/3/02 -0400, CHoaglin at aol.com wrote:
>No, the 8035 is an old Intel MCU. I tore apart an 8048 developement system 
>that used one of these as the processor to run the emulator on. The 8039 
>is either an MCU or a peripheral chip for the 8035, and the 8018 might be 
>a mask programmed PROM.

I can see why they look like date codes and without seeing them I can't 
give my un-professional opinion. 8035, 8039 and 8048 are all MCUs. Until 
recently, most of us had 8048s in our computer keyboards. Some of us still 
do. They were the predecessor (Family) to the MCS51 family. IE 8051 8031 
etc. They were pretty much all mask programed devices which means, in other 
words. "Useless."

However. Since you've been able to mistake one of them 8038 for the 
intersil function generator of the same name, it suggests to me that you're 
looking at a 16 pin chip. All of the above embedded microprocessor families 
are 40 pin chips.

Many years ago I, myself pulled a chip from a system of unknown origin 
which was labeled 8038. Actually about 4 of them. They were even better 
because they were not only gold pinned ceramic bodies but they had a 
plating of really cool looking gold across the top and bottom with the part 
numbers etched in. (However they did that? doesn't matter.) Now how chuffed 
did you think I was? Also from that same "thing" was some more 80xx series 
chips of about 16 pins with the same gold arrangement. Including one 
labeled 8008.

Well the 8008 was a historical artifact worthy of note at least. That's the 
second commercially available microprocessor ever made. The first was a 
4004. They had about enough power to bat an eyelid and that was about all. 
Made by intel some time in the early 70s. I forget when exactly. But when 
you consider the loveable 6502 came out in 76, you're probably going to 
have to jump in the "Way back" machine to find out.

That's where the fun ended.

We all know the 74xxx family of TTL logic. And it's mil-spec counterpart, 
the 5400 family. Well as it turns out there were/are a lot of other 
families as well. And there is also a 70xx and 80xx family. I forget which 
is the mil and which is the com but you get the idea. 75xxx family was a 
bunch of interface chips of which the well know 1488/89 RS232 drivers were 
a part of. Known as 75188/89 respectively if memory serves. Doesn't matter 
but you get the idea. All this stuff was pretty bog standard early TTL 
logic. They were just mounted in fancy mil-spec type packages for whatever 
reason.

If this stuff came out of a TV set then it's highly unlikely that it's 
anything useful. Not in audio terms anyway. Some high speed buffer/amps 
maybe.  Chroma separator chips and crap like that. I've got a fair 
collection of this shit myself but never found a good use for it. I once 
hoped I could buffer/distribute some VGA with some but it turned out they 
weren't even fast enough to do that properly. You might find an audio amp, 
maybe even a few op-amps out of the audio section but usually TVs have 
really lame audio so there's probably nothing there to write home about.

Some TVs of course, do indeed have micros in them so before anyone pulls me 
up on that point, yeah they could still be some kind of controller but I 
doubt it. Not unless they've got 40 pins.

For reference. Intel's micro support chips always started with 82. Like 
8259 interrupt controller. 8250/51 UART. And my favorite funky toy, the 
8255. triple 8 bit port. all 24/28 pin chips except the 55 which is again 40.

All of which is probably not a lot of help but I always found that there 
was never much worth salvaging out of TVs. Sands for some high voltage 
parts but even they're getting fewer and further between these days.

Hope this helps.

Be absolutely Icebox.


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