Re: RS-232 and RS-465 Emco Keyboard X9A000, protocol reverse engineering


I think you are correct in your assumptions that it will be the same communication taking place on both electrical interfaces RS485 and RS232. Without being an electronics expert it looks like they are almost wired in parallell (I assume they are not since there is a specific keyboard sequence to switch in between). In the keyboard X9A000 the interface for RS232 is built up around LT1080CN and RS485 is driven from LTC485CN8. In the picture of the inside the left hand connector is the RS232 and the right hand (with white lettering) is RS485.

It will be very interesting to see what Calmissile/Doug can record when he starts collecting some data !

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