View source for CIO Usage in KC Compact

* [[CIO Overview]]
* [[CIO Usage in KC Compact]]
* [[CIO Registers (Summary)]]
* [[CIO Registers (Detailed)]]

The [[KC Compact]] contains a U82536 CIO chip (russian clone of Zilog Z8536 CIO). The CIO is used to emulate the CPCs [[Printer Port]], and to emulate timings that are normally produced by the CPCs [[Gate Array]].

== CIO I/O Ports in KC Compact ==

  EC00h - CIO Data Port B (video timer)
  ED00h - CIO Data Port C (interrupt timer)
  EE00h - CIO Control Port
  EF00h - CIO Data Port A (bi-directional printer port) (and TEST remote boot)

== CIO Connection in KC Compact ==

  CIO_Pin_____________KC_Compact_Signal______________________________________
  D0..D7,A1,A0        D0..D7, A9, Inverted A8
  /RD,/WR,/CE,PCLK    /IORD, /IOWR, A12, CLK 4MHz
  /INT,IEO,IEI,/IACK  NC (not /INT?), NC, 5V, 5V
  PA0..PA6            Printer Data Bits 0-6 (some also used for TEST feature)
  PA7                 Printer /Strobe (internally inverted via CIOs Polarity)
  PB0,PB1,PB2,PB3     TPAL/3231, TPAL/9, 5V, 5V
  PB4,PB5,PB6,PB7     T16/5830, T16/10, 5V, 5V
  PC0,PC1,PC2,PC3     A/C, HSYNC, VSYV, 5V