that
I only found two out of over 100 6510 that would run his program. he contacted the software company abut it, and they admitted that it was written on a developer's pre production computer, but that they would not give him the current version, or even a discount, so RObert disassembled the software and re wrote the bad parts to work on any
6510.
Try running Basic programs written for the PET on either. They were stripped down so their business software won't run on the cheaper 'home' models.
I used to visit there, but there was very little traffic that wasn't cross posted from British Sinclair users. It had more trolls than regulars, so I gave up.