I am using RTX51-Tiny with Code banking function. Two banks are used and switched by PORT 1 bit 7. When I run my program on simulator, I found all PORT 1 bits are clear to zero except the bit 7. Banking function is still working, but I need the rest bits working, too. Not only my program, but also the example of RTX51 for banking has the same situation. Did any body notice this before? Is this a bug in RTX51 when code banking or just I miss something? Thanks for answer.