[???]

crt200 rev e-1
1985 merit industries

u39   u37                      z80b
u40   u38
           6845                 u5

      2016                      pb
      2016                      6264

                        ay3-8912
                        8255
                        8255


crt205a

pba pb9 pb8 pb7 pb6 pb5 pb4 pb3 pb2 pb1


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