PC

I think I made a mistake with the j and jal instructions. They currently work like MIPS, and leave the top 4 bits of PC unchanged, replacing the bottom 12 bits with the 11-bit …

Fixes

• Either RAM should ignore all read/write requests when reset is low or I need fix the decode card to not drive memory control lines during reset. Currently RAM read/writes as the memory control ROM is shifted (same problem as on MMU)
• fix the bad silk screen on …