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  • Meditations on 4-4 era SCSI controllers

    From Louis Ohland@21:1/5 to All on Sat Jan 7 18:51:57 2023
    While penetrating restricted airspace, I mulled over the positioning of
    the SE 4-4 with the WD33C93B controller. Name ONE other IBM made SCSI controller that does not use the C60/C68 external port.

    Remember the Patriot? Price reduced SCSI controller with an HPDB50
    external port.

    Maybe... the 4-4 is a reduced price SE controller for external CDs or tapes.

    Maybe... the 4-6 is a short version of an early version of a Fast/Wide controller. Remember the short SCSI/A?

    What RS/6000 _MCA_ F/W SCSI controller used a full length adapter?

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  • From Christian Holzapfel@21:1/5 to Louis Ohland on Sat Jan 7 20:03:38 2023
    Louis Ohland schrieb am Sonntag, 8. Januar 2023 um 01:51:45 UTC+1:
    What RS/6000 _MCA_ F/W SCSI controller used a full length adapter?

    The 4-C?

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  • From Louis Ohland@21:1/5 to Christian Holzapfel on Sun Jan 8 07:57:33 2023
    Let me be more klar. SE.

    How many IBM MCA SCSI controllers used a short PCB?

    IBM SCSI/A (short)
    IBM Fast SCSI/A (Patriot, NOT made by IBM)
    IBM F/W SCSI (Corvette)

    One raisin, possumbly, for the differential SCSI to use a Type 3 card
    (full length, but not Passplay) is the need for the jumper header for
    the high availability function.

    There is one other adapter that uses the HPDB50 external connector, the
    FC (2420) SCSI-2 Differential High-Performance External I/O Controller
    (Type 4-2).

    One issue I have findting out more on RS/6000 adapters is that the
    announcement letters are usually for a system. So you have to wade
    through a lot of announcements to findt the earliest availability of a
    specific adapter.

    You can search for the FC, but...



    Christian Holzapfel wrote:
    Louis Ohland schrieb am Sonntag, 8. Januar 2023 um 01:51:45 UTC+1:
    What RS/6000 _MCA_ F/W SCSI controller used a full length adapter?

    The 4-C?


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    * Origin: fsxNet Usenet Gateway (21:1/5)