Changes
renamed OS to firmware; OS is confusing too, implies sth like msdos/cpm/windows, bios or firmware should be clearer
=== 8 bit Printer Port in KC Compact ===
The [[KC Compact]] uses the bit 5 of [[8255|PPI]] Port C as 8th printer bit (this is same as the Happy Computer mod, see above). Although the 8th bit is a built-in feature, the KC Compact OS Firmware doesn't support it. But it's supported by [[FutureOS]].
=== 8 bit Printer Port in Aleste 520EX ===
=== 8 bit Printer Port in CPC Plus ===
In the CPC Plus, Bit 3 of [[CRTC]] Register 0Ch can be used as eighth printer bit. For compatibility to normal CPCs, this feature can be disabled by removing the 10 kOhm resistor R30 on the mainboard (aka R130 in the schematic). See [[LK Links]] for more info. Although the 8th bit is a built-in feature, the CPC Plus BASIC/OS Firmware doesn't support it. However the 8 bit printer port of the CPC Plus is supported by [[FutureOS]].
== External Printer Ports ==
