In Search of 15C+ ROM image

[Divasson]

For some unknown reason, after clearing the matrices with MATRIX 0 the calculator has reverted to old memory size (from 30-163 to 30-35: it kept my register allocation). It had not happened before. On and off or playing the self test did not work to restore the full memory.

I have reprogrammed it again and it works. I have tried to reproduce the error again to no avail: it still keeps the memory allocation as expected.

Has it happened to anyone of you?