* [[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