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Update README.md
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naoto64 authored Dec 24, 2023
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Expand Up @@ -12,13 +12,13 @@ You can make a CPU using the 74HC series logic IC.
Left switch: Controls MUX to choose whether to update Reg A or PC
Right switch: Controls second XOR operand or sets destination PC address

'''
```
LR
00: MUX=0, RA=RA^0=RA, PC=!PC
01: MUX=0, RA=RA^1=!RA, PC=!PC
10: MUX=1, RA=RA, PC=0
11: MUX=1, RA=RA, PC=1
'''
```

In regular words:
OFF, OFF will preserve the value of A and advance PC (0->1, 1->0)
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