* CIO Port A could be reprogrammed by software (for example: making it an Input, or disabling the bit7 inversion)
* The 8th Printer bit connects to Bit5 of PIO Port C (same as the Happy Computer [[8bit Printer Ports|8bit Printer Port]] mod)
* The "TEST" Feature of the KC Compact BIOS allows to boot the computer remotely via some kind of "network" connection, which connects to some of the CIO Port A signals
[[Category:CPC Internal Components]][[Category:Hardware]][[Category:Programming]]