Programs 5b and 5c require a 16k RAM expansion pack, which I do not have.

On the real machine, both programs give OM error, which indicates a lack of RAM,
 and that at least the first part of the recording is ok.

In MESS, 
5b gives IO error so is a bad dump when copied from the tape.
5c gives OM error so it might be ok.

This was downloaded from The MESSUI Place.
