1. Forum
  2. Usenet
  3. COMP.SYS.IBM.PS2.HARDWARE

  • Re: 53C90 datasheet

    From Louis Ohland@21:1/5 to Louis Ohland on Wed Jun 8 11:10:24 2022
    "The original 53C90 lacked direct memory access (DMA) capability"

    Lazy damn cut 'n pasters.

    So the PC4 ADF says:

    "DMA Level Select"
    The PC4 supports the DMA mode of data transfer. The lower the DMA level,
    the higher the priority. DMA level 5 is recommended.

    "DMA Level 5", 6, 7

    So... Way to The Future?

    On 6/8/2022 10:44, Louis Ohland wrote:
    http://bitsavers.trailing-edge.com/components/ncr_symbios/1988_NCR_Standard_Products_Data_Book.pdf


    pages 28-78 physical

    On 6/8/2022 10:25, Louis Ohland wrote:
    http://ps-2.kev009.com/ohland/SCSI/Iomega.html

    Went to the deep end of the digital swimming pool. Foundt WinNT
    3.51/4.0, Win9x, Win3.1/DOS, OS/2 drivers.

    Added images of PC4, PC4B/50.


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Wed Jun 8 10:44:56 2022
    http://bitsavers.trailing-edge.com/components/ncr_symbios/1988_NCR_Standard_Products_Data_Book.pdf

    pages 28-78 physical

    On 6/8/2022 10:25, Louis Ohland wrote:
    http://ps-2.kev009.com/ohland/SCSI/Iomega.html

    Went to the deep end of the digital swimming pool. Foundt WinNT
    3.51/4.0, Win9x, Win3.1/DOS, OS/2 drivers.

    Added images of PC4, PC4B/50.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Wed Jun 8 11:31:19 2022
    5390, no DMA
    53C90, DMA

    ???

    On 6/8/2022 11:10, Louis Ohland wrote:
    "The original 53C90 lacked direct memory access (DMA) capability"

    Lazy damn cut 'n pasters.

    So the PC4 ADF says:

    "DMA Level Select"
    The PC4 supports the DMA mode of data transfer. The lower the DMA level,
    the higher the  priority. DMA level 5 is recommended.

       "DMA Level 5", 6, 7

    So... Way to The Future?

    On 6/8/2022 10:44, Louis Ohland wrote:
    http://bitsavers.trailing-edge.com/components/ncr_symbios/1988_NCR_Standard_Products_Data_Book.pdf


    pages 28-78 physical

    On 6/8/2022 10:25, Louis Ohland wrote:
    http://ps-2.kev009.com/ohland/SCSI/Iomega.html

    Went to the deep end of the digital swimming pool. Foundt WinNT
    3.51/4.0, Win9x, Win3.1/DOS, OS/2 drivers.

    Added images of PC4, PC4B/50.



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