[Simh] MOP header specs?

[Paul Koning]

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 <fsword007 at gmail.com> 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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