|#FAEE||?||[[Amstrad SSA-1 Speech Synthesizer]] (faulty mirror used by included RSX driver)||Read||Write
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|#FAEF||?%xxxxx0x0 xxx0xxxx||[[Kempston Mouse]] - Mouse Buttons||Read||-
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|#FAF5||?||[[ARA Video Digitizer]] - Read Capture Data||Read|| -
|#FBEE||?||[[Amstrad SSA-1 Speech Synthesizer]]||Read||Write
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|#FBEE||?%xxxxx0x1 xxx0xxx0||[[Kempston Mouse]] - 8bit X position||Read||-
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|#FBEE||?||[[KDS_Electronics_Serial_Interface|KDS RS232]] 6850 (reversed bit-order) Status||Read||-
|#FBEF||?||[[PDS development system]] Z80 PIO Port B Control||?||Write
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|#FBEF||?%xxxxx0x1 xxx0xxx1||[[Kempston Mouse]] - 8bit Y position||Read||-
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|#FBEF||?||[[KDS_Electronics_Serial_Interface|KDS RS232]] 6850 (reversed bit-order) RX Data||Read||-