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Re: [cosmacelf] Anybody have a CDP18U42 or CDP1823 SRAM?

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  • Bill Rowe
    I have some kind of cosmac sram somewhere - small though I think, maybe 128 bytes! used it in the 1st homebrew I made. Too small, right? ... From: Robert
    Message 1 of 7 , Mar 1 4:22 AM
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      I have some kind of cosmac sram somewhere - small though I think, maybe 128
      bytes! used it in the 1st homebrew I made. Too small, right?
      ----- Original Message -----
      From: "Robert Armstrong" <bob@...>
      To: <cosmacelf@yahoogroups.com>
      Sent: Wednesday, March 01, 2006 12:08 AM
      Subject: [cosmacelf] Anybody have a CDP18U42 or CDP1823 SRAM?


      >
      > I know it's a long shot, but does anybody have any CDP18U42 COSMAC family
      > EPROMs or CDP1823 SRAMs that they'd be willing to part with? JC and I
      > need
      > a few for a little "project".
      >
      > Thanks,
      > Bob Armstrong
      >
      >
      >
      >
      > ========================================================
      > Visit the COSMAC ELF website at http://www.cosmacelf.com
      > Yahoo! Groups Links
      >
      >
      >
      >
      >
      >
      >
    • Robert Armstrong
      ... No, a CDP1823 was only 128 (bytes!) x8. BTW, the CDP1824 was only 32x8. Not 32K; just 32! Those were the days ... Bob [Non-text portions of this message
      Message 2 of 7 , Mar 1 4:56 AM
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        > Too small, right?

        No, a CDP1823 was only 128 (bytes!) x8. BTW, the CDP1824 was only 32x8.
        Not 32K; just 32!

        Those were the days ...

        Bob


        [Non-text portions of this message have been removed]
      • Bill Rowe
        so let me look. seems to me i had an 1823 ram and an 1821 i/o port. I forget what it did - I know i built a total homebrew 1802 pre the elf. I know where it
        Message 3 of 7 , Mar 1 1:22 PM
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          so let me look. seems to me i had an 1823 ram and an 1821 i/o port. I
          forget what it did - I know i built a total homebrew 1802 pre the elf. I
          know where it is.
          ----- Original Message -----
          From: "Robert Armstrong" <bob@...>
          To: <cosmacelf@yahoogroups.com>
          Sent: Wednesday, March 01, 2006 7:56 AM
          Subject: RE: [cosmacelf] Anybody have a CDP18U42 or CDP1823 SRAM?


          >> Too small, right?
          >
          > No, a CDP1823 was only 128 (bytes!) x8. BTW, the CDP1824 was only 32x8.
          > Not 32K; just 32!
          >
          > Those were the days ...
          >
          > Bob
          >
          >
          > [Non-text portions of this message have been removed]
          >
          >
          >
          > ========================================================
          > Visit the COSMAC ELF website at http://www.cosmacelf.com
          > Yahoo! Groups Links
          >
          >
          >
          >
          >
          >
          >
          >
        • Bill Rowe
          oops. I think the memory part I had in mind was a motorola piece (6810?) and the i/o chip was an 1852. ... From: Bill Rowe To:
          Message 4 of 7 , Mar 1 4:48 PM
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            oops. I think the memory part I had in mind was a motorola piece (6810?)
            and the i/o chip was an 1852.
            ----- Original Message -----
            From: "Bill Rowe" <bill_rowe@...>
            To: <cosmacelf@yahoogroups.com>
            Sent: Wednesday, March 01, 2006 4:22 PM
            Subject: Re: [cosmacelf] Anybody have a CDP18U42 or CDP1823 SRAM?


            > so let me look. seems to me i had an 1823 ram and an 1821 i/o port. I
            > forget what it did - I know i built a total homebrew 1802 pre the elf. I
            > know where it is.
            > ----- Original Message -----
            > From: "Robert Armstrong" <bob@...>
            > To: <cosmacelf@yahoogroups.com>
            > Sent: Wednesday, March 01, 2006 7:56 AM
            > Subject: RE: [cosmacelf] Anybody have a CDP18U42 or CDP1823 SRAM?
            >
            >
            >>> Too small, right?
            >>
            >> No, a CDP1823 was only 128 (bytes!) x8. BTW, the CDP1824 was only 32x8.
            >> Not 32K; just 32!
            >>
            >> Those were the days ...
            >>
            >> Bob
            >>
            >>
            >> [Non-text portions of this message have been removed]
            >>
            >>
            >>
            >> ========================================================
            >> Visit the COSMAC ELF website at http://www.cosmacelf.com
            >> Yahoo! Groups Links
            >>
            >>
            >>
            >>
            >>
            >>
            >>
            >>
            >
            >
            >
            > ========================================================
            > Visit the COSMAC ELF website at http://www.cosmacelf.com
            > Yahoo! Groups Links
            >
            >
            >
            >
            >
            >
            >
          • Gemeny, Steve
            Bill, I can help you out with the 1854. Actually CDP1852CE or CEX, RCA with datacodes in the range 001, 236 & 336, new old stock, still in black foam, never
            Message 5 of 7 , Mar 2 6:46 AM
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              Bill,

              I can help you out with the 1854.

              Actually CDP1852CE or CEX, RCA with datacodes in the range 001, 236 &
              336, new old stock, still in black foam, never taken out to my
              knowledge.

              Contact me directly for details beyond that.

              aa3nm [at} amsat.org will be fine.

              Steve

              -----Original Message-----
              From: cosmacelf@yahoogroups.com
              [mailto:cosmacelf@yahoogroups.com] On Behalf Of Bill Rowe
              Sent: Wednesday, March 01, 2006 7:48 PM
              To: cosmacelf@yahoogroups.com
              Subject: Re: [cosmacelf] Anybody have a CDP18U42 or CDP1823
              SRAM?


              oops. I think the memory part I had in mind was a motorola
              piece (6810?)
              and the i/o chip was an 1852.
              ----- Original Message -----
              From: "Bill Rowe" <bill_rowe@...>
              To: <cosmacelf@yahoogroups.com>
              Sent: Wednesday, March 01, 2006 4:22 PM
              Subject: Re: [cosmacelf] Anybody have a CDP18U42 or CDP1823
              SRAM?


              > so let me look. seems to me i had an 1823 ram and an 1821 i/o
              port. I
              > forget what it did - I know i built a total homebrew 1802 pre
              the elf. I
              > know where it is.
              > ----- Original Message -----
              > From: "Robert Armstrong" <bob@...>
              > To: <cosmacelf@yahoogroups.com>
              > Sent: Wednesday, March 01, 2006 7:56 AM
              > Subject: RE: [cosmacelf] Anybody have a CDP18U42 or CDP1823
              SRAM?
              >
              >
              >>> Too small, right?
              >>
              >> No, a CDP1823 was only 128 (bytes!) x8. BTW, the CDP1824
              was only 32x8.
              >> Not 32K; just 32!
              >>
              >> Those were the days ...
              >>
              >> Bob
              >>
              >>
              >> [Non-text portions of this message have been removed]
              >>
              >>
              >>
              >> ========================================================
              >> Visit the COSMAC ELF website at http://www.cosmacelf.com
              >> Yahoo! Groups Links
              >>
              >>
              >>
              >>
              >>
              >>
              >>
              >>
              >
              >
              >
              > ========================================================
              > Visit the COSMAC ELF website at http://www.cosmacelf.com
              > Yahoo! Groups Links
              >
              >
              >
              >
              >
              >
              >



              ========================================================
              Visit the COSMAC ELF website at http://www.cosmacelf.com



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              [Non-text portions of this message have been removed]
            • AA3NM
              Bill, I can help you out with the 1852. Actually CDP1852CE or CEX, RCA with datacodes in the range 001, 236 & 336, new old stock, still in black foam, never
              Message 6 of 7 , Mar 3 6:33 AM
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                Bill,

                I can help you out with the 1852.

                Actually CDP1852CE or CEX, RCA with datacodes in the range 001, 236 &
                336, new old stock, still in black foam, never taken out to my
                knowledge.

                Contact me directly for details beyond that.

                aa3nm [at} amsat.org will be fine.

                Steve
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