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Thread: C64 Socketed Chips

  1. #1

    Default C64 Socketed Chips

    Is it normal for a C64 to have a lot of socketed chips? I always thought that most of them were soldered directly to the board and that it was common practice to socket them if replacing.

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  2. #2

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    I have an early one with mostly all of the chips socketed. The story I’ve heard is that if there was a shortage of a certain chip when the board was being assembled, they’d stick a socket in place of the missing chip. That way the soldering could happen and when the chips came in they could just pop one in.

  3. #3

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    That is a nice explanation but I have seen a lot of boards and AFAIR the DRAMs always have been soldered. So I'm curious how the soldering looks at the back of the board.
    With kind regards / met vriendelijke groet, Ruud Baltissen

    www.baltissen.org

  4. #4

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    That would make sense, since the RAM chips weren’t custom MOStek parts, there was probably more supply of them. But the story still could be fiction.

  5. #5

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    CSG/MOS ≠ Mostek.

  6. #6

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    Quote Originally Posted by KC9UDX View Post
    CSG/MOS ≠ Mostek.
    I stand corrected.

  7. #7

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    Quote Originally Posted by KC9UDX View Post
    CSG/MOS ≠ Mostek.
    And also, MOS/CSG never succeeded in making working DRAMs.

    Frank

  8. #8

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    Quote Originally Posted by iz8dwf View Post
    And also, MOS/CSG never succeeded in making working DRAMs.
    If only Commodore hadn't taken that as a clue to not use DRAM.

  9. #9

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    Quote Originally Posted by KC9UDX View Post
    If only Commodore hadn't taken that as a clue to not use DRAM.
    DRAM was cheaper but still had a high rate of failure, as did early static.
    Socketing DRAM made sense. I suspect the other reason made sense for other parts, like the TTL.
    Dwight

  10. #10

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    Recently I have been working on some Matrox S100 graphics cards. The chips appear more or less randomly socketed. In their manual they state it's because there is a shortage of 74LS IC's and they had to fit 74 types and then socketed them, so they could be replaced later, that was around 1976 that the shortage happened.

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