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  • Re: segments and architectural experimentation (was Re: segments, was S

    From David Schultz@3:633/10 to All on Fri Sep 11 13:06:38 2026
    Subject: Re: segments and architectural experimentation (was Re: segments, was Self-hosting and the 6502)

    On 9/11/26 9:55 AM, john larkin wrote:
    He has designed an IC CMOS opamp and is having some fabbed. Even kids
    can do that nowadays.

    They could do it in the 90's. You couldn't fit a lot onto a MOSIS
    Tinychip in 2 micron but you could get stuff done. Without paying for it yourself as the professor usually had a budget for that sort of thing.

    --
    https://davesrocketworks.com
    David Schultz
    "It's just this little chromium switch here..."

    --- PyGate Linux v1.5.19
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)
  • From someone@3:633/10 to All on Mon Sep 14 16:45:02 2026
    Subject: Re: segments and architectural experimentation (was Re: segments, was Self-hosting and the 6502)

    A one million bit address space means 2^20 or 20 bits. Partitioning memory into blocks has been around since the days of magnetic core memory. All those old machines used base registers, offset, registers, index registers or some other means to form addresses. It certainly simplified the opcode designation and address formation for memory access. Looks like it later eveloved into cache memory speedup which was premised on the assumption the code was working on data in reasonabe proximity in the memory. Magnetic core was slow, dynamic RAM was quick, and they were just getting used to the idea of static versus "volatile" memory.

    --
    For full context, visit https://www.electrondepot.com/electrodesign/segments-and-architectural-experimentation-was-re-segments-4410551-.htm


    --- PyGate Linux v1.5.19
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)