When RAMDIS="1" the internal RAM of the CPC/CPC+/KC Compact is forced inactive.
e.g. a ram-expansion device would use this signal to override the internal RAM selection with the ram RAM on the device. The internal RAM would be forced inactive, and the ram RAM on the ram-expansion would be actived.
=== /RAMRD ===
(Ram RAM Read; Output from Gate-Array)
When /RAMRD="0" a ram read operation is active. This signal is generated by the Gate-Array. This signal will be "0" when:
* A15=A14="0" and bit 2 of the Gate-Array rom configuration register is set to 1. (lower rom ROM disable)* A15=A14="1" and bit 3 of the Gate-Array rom configuration register is set to 1. (upper rom ROM disable)
* A15 is not equal to A14.