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|#FADC||?||[[Amstrad Serial Interface]] Z80-SIO / DART port A Data Register||Read||Write
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|#FADC||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8251 USART data|| Read || Write
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|#FADD||?||[[Amstrad Serial Interface]] Z80-SIO / DART port A Control Reg.||Read||Write
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|#FADD||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8251 USART control/status|| Read || Write
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|#FADE||?||[[Amstrad Serial Interface]] Z80-SIO / DART port B Data Register||Read||Write
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|#FBDC||?||[[Amstrad Serial Interface]] 8253 Timer counter 0||Read||Write
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|#FBDC||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8253 timer 0 (transmit baudrate)|| Read || Write
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|#FBDD||?||[[Amstrad Serial Interface]] 8253 Timer counter 1||Read||Write
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|#FBDD||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8253 timer 1 (receive baudrate)|| Read || Write
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|#FBDE||?||[[Amstrad Serial Interface]] 8253 Timer counter 2||Read||Write
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|#FBDE||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8253 timer 2 (used as 1ms timer)|| Read || Write
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|#FBDF||?||[[Amstrad Serial Interface]] 8253 Timer Modus Select|| - ||Write
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|#FBDF||?||[[RS-232 para Amstrad|MHT Ingenieros RS232 para Amstrad]] 8253 timer 0-2 control|| - || Write
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|#FBDF||?||[[Cirkit serial interface]] 8251 UART status/control register||Read||Write