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Recent content by yuhong

  1. Y

    I am thinking of the AMD Am486 and Energy Star right now

    (I am well aware that some chipsets had support for routing them to interrupts other than SMI)
  2. Y

    I am thinking of the AMD Am486 and Energy Star right now

    Yes, I am well aware the chipset also needed SMI support. The problem is that it also needed a supported CPU as well. Intel added this early on, AMD on the other hand... (and how many APM implementations worked without it?)
  3. Y

    I am thinking of the AMD Am486 and Energy Star right now

    It is supposely a software spec, but I am talking about the implementation which often requires SMI
  4. Y

    I am thinking of the AMD Am486 and Energy Star right now

    Interestingly even reviews didn't mention this at the time: https://books.google.com/books?id=ajgEAAAAMBAJ&pg=PA124&dq=compaq+prolinea+amd+processor&hl=en&sa=X&ved=2ahUKEwji7uKImMiGAxWJGDQIHZcFDmIQ6AF6BAgJEAI#v=onepage&q=compaq%20prolinea%20amd%20processor&f=false
  5. Y

    I wonder why the 80387DX used a 68-pin PGA and not PLCC package

    The 286 already had a CLCC/PLCC package.
  6. Y

    I wonder if part of why EGA had write only registers...

    Interestingly it seems like the initial price for C&T's EGA chipset were also $84.5
  7. Y

    I wonder why the 80387DX used a 68-pin PGA and not PLCC package

    I wonder why the 80387DX used a 68-pin PGA and not PLCC package
  8. Y

    I wonder if part of why EGA had write only registers...

    Hercules itself was designed as an extension of MDA to use the same monitors.
  9. Y

    I wonder if part of why EGA had write only registers...

    Heck I suspect this is the real reason why PC's Limited only offered Hercules and EGA at one point.
  10. Y

    I wonder if part of why EGA had write only registers...

    What I mean is look at https://upload.wikimedia.org/wikipedia/commons/4/47/KL_Genoa_EGA.jpg and compare it with a VGA card.
  11. Y

    I wonder if part of why EGA had write only registers...

    Though I found out that the EGA and PGA displays used the same tubes.
  12. Y

    I wonder if part of why EGA had write only registers...

    I mean the register compatible ones.
  13. Y

    I wonder if part of why EGA had write only registers...

    Thinking about it, I assume by the time of VGA ASIC fabrication improved, making VGA clones cheaper than EGA.
  14. Y

    Parallel port ethernet adapters?

    AFAIK it predates EPP and ECP.
  15. Y

    Parallel port ethernet adapters?

    AFAIK the PS/2 was one of the first to provide a bidirectional one.
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