UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

SiriusHardware · 24th Oct 2020, 6:15 pm

Tim, as a matter of interest what is the EXACT numbering on your non-A 877s?

Just been looking around with a view to ordering a couple of non-A variants through work and I'm surprised to see the non-A version seems to be available in 4MHz DIP (PIC16F877-04/P) and 20MHz DIP (PIC16F877-20/P). I was never aware before that they were available in 'two speeds'.

This one instance that you have found where the project code works OK in non-A but not quite OK in 'A' variants probably means that we have to test any future code revisions in both types from now on, unless Karen decides that the project has to use a non-A variant.

24th Oct 2020, 6:15 pm	#559
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,583	Re: Mk14 vdu Tim, as a matter of interest what is the EXACT numbering on your non-A 877s? Just been looking around with a view to ordering a couple of non-A variants through work and I'm surprised to see the non-A version seems to be available in 4MHz DIP (PIC16F877-04/P) and 20MHz DIP (PIC16F877-20/P). I was never aware before that they were available in 'two speeds'. This one instance that you have found where the project code works OK in non-A but not quite OK in 'A' variants probably means that we have to test any future code revisions in both types from now on, unless Karen decides that the project has to use a non-A variant.