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====Disc Controller Signals==== | ====Disc Controller Signals==== | ||
Unlike the +3, the +2A and +2B have no floppy disc controller. Amstrad's original intention was to produce an external floppy controller addon which would have connected to the expansion port on these computers. Since the [[The Amstrad | Unlike the +3, the +2A and +2B have no floppy disc controller. Amstrad's original intention was to produce an external floppy controller addon which would have connected to the expansion port on these computers. Since the [[The Amstrad gate array|gate array]] is the same on all three machines, all the decoding logic is already present to generate the disk read/write and motor control signals. These three signals are therefore connected through to the expansion port. | ||
These signals occupy the pins which were originally used for the component video signals on the [[ZX Spectrum 16k/48k Edge Connector|16k/48k]] expansion port. | These signals occupy the pins which were originally used for the component video signals on the [[ZX Spectrum 16k/48k Edge Connector|16k/48k]] expansion port. | ||