Nonpareil status

[brouhaha]

I went back to Nonpareil 0.78 and verified that the 12C self-test passed without showing extra segments and without changing the BEGIN and D.MY indicators. Particularly interesting is that the old code appears to have had the low six bits of both LCD bitmap registers as read/write, with the low 6 bits not having been dealt with in any special way, and that the C<>G operation does not seem to occur with a pointer value of 13. Clearly I need to do further analysis of what's going on. I reopened the issue on Github.