• It's not the size, but the frequency [TMC-18C50 performance]

    From Louis Ohland@21:1/5 to All on Tue Jan 11 10:40:55 2022
    My intrigue has been piqued. The historical lore is that the Patriot
    does 3MB/s over the MCA bus.

    No tech ref at hand.

    Maybe... since the MCS-700 is PIO, this "3MB/s" comes from using it on a
    386 class system. Maybe. The 18C50 is always referred to as "SCSI-2" and
    you see references to 10MB/s...

    I am kontuzed.

    The Patriot hooked up a CD-ROM in a Lacuna. So let's mathicate [sordid
    like medicate] and look at the quad-speed transfer rate [600KB/s?].

    What Patriot-connected CD-ROM was offered in the 77s?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Tue Jan 11 11:15:20 2022
    Reading the announcement letter for the 77s, it was offered with a
    double speed CD-ROM.

    300KB/s.

    Patriot has U1 40.0000 MHz osc.

    Functions of Late Adapter Oscillators
    20 MHz oscillator is for the SCSI-Line interface processor.
    25 MHz drives the cache controller.
    32 MHz clock for 80C186-16, which supplies the busmaster functions.

    Well, the 18C50 has an 8KB buffer.

    On 1/11/2022 10:40, Louis Ohland wrote:
    My intrigue has been piqued. The historical lore is that the Patriot
    does 3MB/s over the MCA bus.

    No tech ref at hand.

    Maybe... since the MCS-700 is PIO, this "3MB/s" comes from using it on a
    386 class system. Maybe. The 18C50 is always referred to as "SCSI-2" and
    you see references to 10MB/s...

    I am kontuzed.

    The Patriot hooked up a CD-ROM in a Lacuna. So let's mathicate [sordid
    like medicate] and look at the quad-speed transfer rate [600KB/s?].

    What Patriot-connected CD-ROM was offered in the 77s?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)