If I could get this connected and understand the communication method then I could probably just send it ASCII over a serial terminal program. Looking at the data sheet, I found that it used a ASCII code for characters and some additional codes for enabling different functions on the unit. I suspected the this was a 12 Volt model but there was really only one way to verify that. Other models were designed to connect directly to some bus (computer bus?) and ran at 12 volts. The newer models would run on 5 volts and some even sport a USB interface. Through the Futaba web site I was able to register and download similar data sheets, but not the exact data sheet for this unit. Doing a little online searching I found that Futaba makes quite a few models of displays and this model was a bit dated. Later, after disassembling the case, I was able to pull the full raw display PCB out and find the make and model. Since I had time, I also was able to unwind the wiring harnesses from the registers. I decided to harvest all three of the displays and see if I could put them to some future use.
Although they had been damaged when hoisted into the bins, I noticed that the register displays were intact. On this occasion, the bins contained three fully functional IBM cash registers. I sometimes pass by these bins and things catch my eye. Although the electronics are not longer needed, that does not mean that they are not functional. The company I work for has electronic recycling bin that is a grave yard of discarded electronics.
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