16550UART        wr/R  1770FDC          wr/R  2681DUART        wr/R  6402UART         wr/R  6522VIA          wr/R
 6532RIOT         wr/R  6551/txt         wr/R  6551ACIA         wr/R  6581SID          wr/R  6818RTC          wr/R
 6821PIA          wr/R  6845CRTC         wr/R  6845Notes        wr/R  6850ACIA         wr/R  6854ADLC         wr/R
 8154PIO          wr/R  8251UART         wr/R  8279KDC          wr/R  9914IEEE         wr/R  ACIA             wr/R
 BytePorts        wr/R  IDEPorts         wr/R  ScrnSizes        wr/R  SCSIPorts        wr/R  Z80PIO           wr/R
 Z80SIO           wr/R