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harwoodr
Joined: 10 Jun 2015
Posts: 3
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 Posted: Wed Jun 10, 2015 4:25 pm Post subject: Mostek MK4002? |
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So I came across 9 of these chips in some very old scrap - my reading suggests that they are ram... but information on them seems scarce.
What have I found? |
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frag_
Joined: 17 Nov 2008
Posts: 4015
Location: Estonia
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| Posted: Wed Jun 10, 2015 5:10 pm Post subject: |
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Simply too many pins for RAM, in 1972 there wasn't even 4Kilobit ones.
It's not mentioned in Mostek IC Guide, may be custom chip. |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Thu Jun 11, 2015 2:44 am Post subject: |
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| Should be 256 bit SRAM, 64x4, PMOS, +5V and -9V supply. |
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harwoodr
Joined: 10 Jun 2015
Posts: 3
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| Posted: Thu Jun 11, 2015 9:03 am Post subject: |
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Why so many pins for 256 bit?
The whole cache of "old stuff" is quite interesting. I found some Intel SDK-51 and SDK-85 boards, a whole tube of intel 8035 chips... a crap-ton of eproms (C1702A)...
I'm giving a lot of this to a local computer museum... they're salivating over the SDK boards.  |
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Vlasta
Joined: 15 May 2012
Posts: 2565
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| Posted: Fri Jun 12, 2015 12:56 am Post subject: |
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| harwoodr wrote: | Why so many pins for 256 bit?
The whole cache of "old stuff" is quite interesting. I found some Intel SDK-51 and SDK-85 boards, a whole tube of intel 8035 chips... a crap-ton of eproms (C1702A)...
I'm giving a lot of this to a local computer museum... they're salivating over the SDK boards. |
I bet they are. What a lucky museum and what a generous person you are.
_________________
best rgds.
Steve |
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harwoodr
Joined: 10 Jun 2015
Posts: 3
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| Posted: Fri Jun 12, 2015 9:13 am Post subject: |
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Oh yeah, I'm awesome - just ask me.
Seriously though, the boards are worth a couple hundred each - tops - so it's just not worth my while to try and sell them, when I can give them to museum. |
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