There were at least two versions of the LC ROM and there was multiple revisions of the Apple][ Motherboards. Some had a socketed dip chip.
If you used the wrong LC ROM, you got garbled font display as the data alignment/interleave was wrong. One version of the ROM required piggy-backing a line to the IC so it could address the char values range for lowercase.
About the graphical text environment that allowed you, lowercase text and mixed text and graphic. It was brought by a software suit named like Mibbit.