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Thread: Cheap NOS 16Kb DRAMs available

  1. #1
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    Default Cheap NOS 16Kb DRAMs available

    Not mine, but I note that Goldmine Electronics has NOS MB8118-15 DRAMs on sale for 25 for $15.

    https://www.goldmine-elec-products.c...?number=G22358

  2. #2

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    Hmmmm... $.60 each...

    They're 1 bit chips, aren't they?

    So nine would make a 16Kb bank (with parity).

    64 banks would make a MB.

    64 banks = 576 chips.

    So 1 MB of these chips would run ~ $345.60 or so.

    Wow... $345 per MB... whata deal!
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  3. #3
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    Old things are what they are. My Altair used 4Kbit chips. And that was an improvement over the 256 bit and 1Kbit chips.

    First-gen 5150s used these as well as many older 8-bit systems. $0.60 for NOS is quite a deal.

    A 5150 sold at inflation-adjusted prices today would seem insanely expensive, given the capabilities.

    So what's your point?

  4. #4

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    Quote Originally Posted by Chuck(G) View Post
    So what's your point?
    Just stating facts, not unlike you did.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

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    Quote Originally Posted by Stone View Post
    Just stating facts, not unlike you did.
    You editorialized as well:

    Wow... $345 per MB... whata deal!
    Non sequitur.

    In fact, in 1975, it would be an outrageous deal. But the same thing could be said of virtually any storage medium. With a 16TB hard disk going for $400, a 20MB hard disk should cost about $.0005 (five one-hundredths of a cent).
    Try to find one on eBay for that--oh, and deduct a bit for the controller (part of the 16TB drive) that you'll need for that 20MB drive.

  6. #6
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    Any idea what machines used these? They aren't pin-compatible with MOSTEK 4116s that I have in my TRS-80 Model I

  7. #7
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    Quote Originally Posted by Chuck(G) View Post
    Not mine, but I note that Goldmine Electronics has NOS MB8118-15 DRAMs on sale for 25 for $15.

    https://www.goldmine-elec-products.c...?number=G22358
    5+V only parts are very handy

  8. #8
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    Lift pin 8 and connect it to pin 9. It's then a drop-in for 4116, but uses only a single-rail +5 supply.

    +5v 16Kb DRAM is pretty hard to come by, normally.

  9. #9
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    Went to buy a few things on their site but man they charge alot for shipping. For a bunch of light weight items they want $25 to ship it.

  10. #10
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    They used to have flat-rate USPS shipping for small items--something like $5. $25 is insane for a bunch of DRAMs. Glad I bought my keyboards when I did.

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