Hans OttenNice to see my white 6502 CPU is OK, and is indeed missing the ROR instruction.
The first LED from the right is telling the ROR is missing, the second the jump page bug is there, the third is telling it is NMOS.
Irenes (many)@hansotten ooo pretty :3
0x10f/kalle/qalle@hansotten Here's a workaround for missing ROR A by the way (8 bytes, up to 8 cycles):
BCS set
LSR A
BPL done ; always
set:
LSR A
ORA #$80
done:
Eight ROL A instructions will also do the job in the same number of bytes but twice as slow.
Source: https://www.pagetable.com/?p=406#comment-2037