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  • register organization within the IOCC

    From Louis Ohland@21:1/5 to Christian Holzapfel on Fri Jan 13 08:33:05 2023
    Special Facilities page 177
    Figure 77 shows the register organization within the IOCC.

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration
    choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8
    slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended input/output) modules with their own IOCC (I/O channel control unit), each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical Information - General Architectures, section 1-8, Figure 3 "Fourth Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf

    My guess is that each IOCC has its own NVRAM.


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  • From Louis Ohland@21:1/5 to Christian Holzapfel on Fri Jan 13 08:24:50 2023
    Bus Time Out page 124

    A number of conditions can result in a hung bus or in grossly extended
    I/0 bus cycles. These errors can result in overrun conditions to other
    devices on the I/O bus and are checked by the IOCC using a bus timeout mechanism. Although the minimum architected bus timeout value is 7.8 microseconds, the IOCC does not attempt to check that finely and should Implement a timeout that varies between 15 and 120 microseconds. See "Implementation Details" on page 2-86.

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration
    choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8
    slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended input/output) modules with their own IOCC (I/O channel control unit), each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical Information - General Architectures, section 1-8, Figure 3 "Fourth Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf

    My guess is that each IOCC has its own NVRAM.


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  • From Louis Ohland@21:1/5 to Louis Ohland on Fri Jan 13 08:45:04 2023
    Chapter 3. Vital Product Data page 199

    I am konfuzed. VPD stores POS?

    Louis Ohland wrote:
    IOCC = CACP ?

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration >>> choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8 >>> slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended
    input/output) modules with their own IOCC (I/O channel control unit),
    each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical
    Information - General Architectures, section 1-8, Figure 3 "Fourth
    Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf


    My guess is that each IOCC has its own NVRAM.


    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to Christian Holzapfel on Fri Jan 13 08:50:10 2023
    • •co L = board ID (adapter board ID) page 203
    The board ID field is supplied by software after reading the board ID
    from POS 0 and POS 1 registers. (Programmable Option Select (POS),
    replaces switches on feature boards. It is defined under •Micro Channel Adapter Requirements• on page 3-16.) This descriptor only applies to
    Micro Channel adapters. This descriptor is not present within the machine-readable VPD field contained within an adapter or channel. It Is
    added by software to the configuration and VPD file or the NVRAM area
    for VPD.

    Following the two bytes of the board ID Is a field generated and used by software, which contains mask bytes and POS data used to initialize the adapter. It also contains a flag byte to Indicate whether this adapter
    was successfully configured. The detailed specification of this field Is defined by the software operating system.

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration
    choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8
    slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended input/output) modules with their own IOCC (I/O channel control unit), each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical Information - General Architectures, section 1-8, Figure 3 "Fourth Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf

    My guess is that each IOCC has its own NVRAM.


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  • From Louis Ohland@21:1/5 to Christian Holzapfel on Fri Jan 13 08:56:07 2023
    Micro Channel Adapter Requirements page 214

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration
    choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8
    slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended input/output) modules with their own IOCC (I/O channel control unit), each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical Information - General Architectures, section 1-8, Figure 3 "Fourth Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf

    My guess is that each IOCC has its own NVRAM.


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Fri Jan 13 08:59:42 2023
    R/W Port for Ext Config Data (VPD) page 215

    POS[3]

    Louis Ohland wrote:
    Micro Channel Adapter Requirements page 214

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration >>> choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8 >>> slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots
    and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended
    input/output) modules with their own IOCC (I/O channel control unit),
    each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical
    Information - General Architectures, section 1-8, Figure 3 "Fourth
    Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf


    My guess is that each IOCC has its own NVRAM.


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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From KP2 KP2@21:1/5 to Louis Ohland on Mon Mar 20 18:19:42 2023
    On Friday, January 13, 2023 at 6:59:31 AM UTC-8, Louis Ohland wrote:
    R/W Port for Ext Config Data (VPD) page 215

    POS[3]
    Louis Ohland wrote:
    Micro Channel Adapter Requirements page 214

    Christian Holzapfel wrote:
    Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:
    One fact overlooked when considering the plentiful RS/6000 configuration >>> choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8 >>> slots.

    Ever consider why the Server 195 / 295 has two sets of slots, 8 slots >>> and 4 slots?

    RS/6000 systems *may* have many IOU (input/output) or XIO (extended
    input/output) modules with their own IOCC (I/O channel control unit),
    each controlling up to 8 Micro Channel slots.
    See SA23-2647-00 POWERstation and POWERserver - Hardware Technical
    Information - General Architectures, section 1-8, Figure 3 "Fourth
    Processor Chip Set".
    https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000_Hardware_Technical_Information_General_Architectures_1993.pdf


    My guess is that each IOCC has its own NVRAM.

    Chet Heath

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  • From Louis Ohland@21:1/5 to All on Mon Mar 20 23:16:20 2023
    Blessed be his name!

    Other than praising the creator [VGER ?] what's up with Chet Heath?

    KP2 KP2 wrote:
    Chet Heath

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