Shifting the night away

After making a small change which could easily have killed all the instructions I'd gotten working so far [but didn't], I now have the shift instructions [immediate or register shift amount, left or right, logical or arithmetic] working.

I'm not sure which instructions I'll work on next. There's a bunch of design work that's going to have to be done for either the memory or PC stuff, and I want to see if I can possibly reuse the ALU state machines.

However, before I do that I want to add to the code that lets me load in tests and helps me visualize data within the simulator. Currently I have to enter tests bit-by-bit, and I'd like to be able to simplify my input files such that I can just input bytes. Similarly, I need to mark up my design files a bit in order to see more of what's going on inside the simulator. The code for that part's already in, but I should add a bunch of annotations to the XML source of the design to make use of it.

Further down the line, I'll be building on that to have self-verifying tests. I'm not sure I'll get that far before getting back to logic design, though.

Down:

• addc
• addci
• add
• addi
• subc
• subci
• sub
• subi
• or
• ori
• xor
• xori
• and
• andi
• sh
• shi

To Go:

• lbr
• lba
• lsbr
• lsba
• sbr
• sba
• ssbr
• ssba
• b
• bc
• bal
• jal
• jmp
• li