MOP is a protocol, not a storage spec. The protocol is defined in detail, in
the MOP architecture spec, which can be found in various collections of DECnet
architecture specs.
I assume a SYS file is a file meant to be downloaded by a MOP server on some
host. What the file contents means depends on what the sender and/or receiver
do with that data; the MOP protocol spec has no opinion about it. So the
question actually becomes: what do the MOP server on OS x, and/or the MOP
client on hardware or OS y, expect to see in the header of the file used for
MOP request z?
paul
> On Feb 20, 2018, at 10:13 PM, Tim Stark <[email protected]> wrote:
>
> Folks,
>
> Does anyone know any documentation provides some information about MOP header
> in SYS files?
>
> Look at first 256 bytes of SYS files:
>
> 00000000: A8 00 30 00 44 00 58 00-00 00 00 00 30 32 30 35 |..0.D.X.....0205|
> 00000010: 01 01 00 00 FF FF FF FF-FF FF FF FF 00 00 00 00 |................|
> 00000020: 20 00 00 01 00 00 00 00-00 00 00 00 00 00 00 00 | ...............|
> 00000030: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
> 00000040: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
> 00000050: 00 00 00 00 00 00 00 00-03 4D 4F 50 00 00 00 00 |.........MOP....|
> 00000060: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
> 00000070: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 |................|
> 00000080: 04 56 31 2E 30 00 00 00-00 00 00 00 00 00 00 00 |.V1.0...........|
> 00000090: 00 00 00 00 00 00 00 00-05 30 35 2D 30 35 00 00 |.........05-05..|
> 000000A0: 00 00 00 00 00 00 00 00-10 00 87 15 00 00 00 00 |................|
> 000000B0: 80 00 00 00 02 00 00 00-00 00 FF FF FF FF FF FF |................|
> 000000C0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF |................|
> 000000D0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF |................|
> 000000E0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF |................|
> 000000F0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF |................|
>
> Thanks,
> Tim
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