[Simh] Problem with reading tape with PDP-11 SIMH

[Timothe Litt]

On 21-May-15 15:54, Alan Frisbie wrote:
> On 05/21/2015 12:47 PM, Mark Pizzolato - Info Comm wrote:
>>  > sim> set ts0 format=tpc
>>  > sim> show ts0
>>  > TS0     not attached, write enabled, TPC format
>>  >         unlimited capacity
>>  > sim> attach -n ts0 newrsx11s.tpc
>>  > File open error
>>  > sim>
>>
>> Simh does not support writing tapes in TPC format.
>
> Darn. 
Write in the preferred SimH format.  Convert to tpc only if necessary.

tpc is supported by SImH mainly for reading tapes from other sources. 
Most emulators will read SimH, but you can convert with external tools
if necessary.

Actually, it's better to convert TPC to TAP even for reading; SImH has to
create an in-memory map of where all the records are when it attaches
a TPC tape.  This is required for backspacing and read reverse...  It's
cheaper to convert the file once.



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