Hi, it is simple a) C64 keyboard was not only c64 keyboard , but also vic 20 and 4032 (monochrome c64) and b) there were few different pcb-s, space was needed for pcb (edge above) and also space to bend cable (notch bellow) Wider on top: rubber dome(no spring) keyboard, round rubber like in remotes -pcb with an edge above: - so you can use connector with a wires -pcb with an edge above: - to save one connector they soldered wires directly to pcb Narrow notch on bottom: Mostly Mitsumi with spring single sided pcb ( and latter double sides ) -pcb with soldering holes for wires instead edge on the bottom of singleside pcb, notch is there in order to have room to bend cable and return it,soldering blob is inside keyboard -pcb with soldering holes for wires instead edge on the bottom of doublesided pcb, notch is there in order to have room to bend cable, and return it,soldering blob for wire is bellow keyboard. No notch at all: Mostly Mitsumi with spring double sides pcb -pcb with soldering holes for wires at the top of doublesided pcb, soldering blob is inside keyboard, there is no need to bend cable Regards, Zoran On 7/18/23 18:01, silverdr_at_srebrnysen.com wrote: > Nobody? Nothing? > >> On 16 Jul 2023, at 19:52, silverdr_at_srebrnysen.com wrote: >> >> […] keyboards may have frames with either relatively narrow notch on the bottom OR a much wider one on the top of the frame (any other variations out there?), does anyone know "why?" and "what for?" those notches were designed-in in the first place? I don't recall any incompatibilities and always believed all 64 keyboards (plus VC-20 ones) were fully interchangeable, weren't they? >> >> -- >> SD! >Received on 2023-07-19 00:00:02
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