CIO Registers (Summary)

• CIO Overview
• CIO Usage in KC Compact
• CIO Registers (Summary)
• CIO Registers (Detailed)

Summary of CIO Registers (Index 00h..2Fh)

 00h - Master Interrupt Control Register (R/W)
 01h - Master Configuration Control Register (R/W)
 02h - Interrupt Vector Register Port A (R/W)
 03h - Interrupt Vector Register Port B (R/W)
 04h - Interrupt Vector Register Counter/Timers (R/W)
 05h - Data Path Polarity Register Port C (4 LSBs only) (R/W)
 06h - Data Direction Register Port C (4 LSBs only) (R/W)
 07h - Special I/O Control Register Port C (4 LSBs only)(R/W)
 08h - Port A Command and Status Register (Parts R/W)
 09h - Port B Command and Status Register (Parts R/W)
 0Ah - Counter/Timer 1 Command and Status (Parts R/W)
 0Bh - Counter/Timer 2 Command and Status (Parts R/W)
 0Ch - Counter/Timer 3 Command and Status (Parts R/W)
 0Dh - Port Data Register Port A (R/W) (directly addressable)
 0Eh - Port Data Register Port B (R/W) (directly addressable)
 0Fh - Port Data Register Port C (R/W) (directly addressable)
 10h - Counter/Timer 1 Current Count Register MSB (R)
 11h - Counter/Timer 1 Current Count Register LSB (R)
 12h - Counter/Timer 2 Current Count Register MSB (R)
 13h - Counter/Timer 2 Current Count Register LSB (R)
 14h - Counter/Timer 3 Current Count Register MSB (R)
 15h - Counter/Timer 3 Current Count Register LSB (R)
 16h - Counter/Timer 1 Time Constant Register MSB (R/W)
 17h - Counter/Timer 1 Time Constant Register LSB (R/W)
 18h - Counter/Timer 2 Time Constant Register MSB (R/W)
 19h - Counter/Timer 2 Time Constant Register LSB (R/W)
 1Ah - Counter/Timer 3 Time Constant Register MSB (R/W)
 1Bh - Counter/Timer 3 Time Constant Register LSB (R/W)
 1Ch - Counter/Timer 1 Mode Specification (R/W)
 1Dh - Counter/Timer 2 Mode Specification (R/W)
 1Eh - Counter/Timer 3 Mode Specification (R/W)
 1Fh - Current Vector Register (R)
 20h - Port A Mode Specification Register (R/W)
 21h - Port A Handshake Specification Register (R/W)
 22h - Data Path Polarity Register Port A (R/W)
 23h - Data Direction Register Port A (R/W)
 24h - Special I/O Control Register Port A (R/W)
 25h - Port A Pattern Polarity (PP) Register (R/W)
 26h - Port A Pattern Transition (PT) Register (R/W)
 27h - Port A Pattern Mask (PM) Register (R/W)
 28h - Port B Mode Specification Register (R/W)
 29h - Port B Handshake Specification Register (R/W)
 2Ah - Data Path Polarity Register Port B (R/W)
 2Bh - Data Direction Register Port B (R/W)
 2Ch - Special I/O Control Register Port B (R/W)
 2Dh - Port B Pattern Polarity (PP) Register (R/W)
 2Eh - Port B Pattern Transition (PT) Register (R/W)
 2Fh - Port B Pattern Mask (PM) Register (R/W)
 30h..3Fh - Reserved