[Simh] RP/RM differences in header commands (for ITS, salvager)

[Lars Brinkhoff]

SALV actually writes data for an entire track all in one go.  I tried
something which skips the headers in the middie.  But there must be
something else wrong with my code, because when reading back the sector
data I just get zeroes.

Anway, I agree something like that would go most of the way to make SALV
happy.  There's another part of SALV that reads the header information
go access the pack number written there, but I'm not sure how that
number is used later.


Bob Supnik wrote:
> I don't think it's that straightforward. The write header and data
> command must include the proper Massbus word count for header and
> data. The Unibus side of the RH11 is doing 18b transfers, and so is
> the disk side, so the word count ought to be 260 for an RP and 258 for
> an RM.
>
> If the simulator doesn't "skip" the right number of header words, SALV
> is going to fail on its block data check.
>
> /Bob
>
> Johnny Billquist wrote:
>> I would vote for someone doing just the naive write as a starting
>> point.  I think much software will be happy enough with just that,
>> and then we can look at specific when we locate software that really
>> do care about what is written into the headers.