What IR hardware does the Newton use?
According the the Newton Q&A document from Apple … In the Apple MessagePad 100, 110, and 120, the Sharp ExpertPad, and the Motorola Marco, the IR transmitter/receiver is a Sharp Infrared Data Communication Unit model RY5BD11 connected to channel B of a Zilog 85C30 SCC. Data is communicated along a 500 KHz carrier frequency at 9600 or 19200 baud, 8 data bits, 1 stop bit, odd parity. The IR hardware requires a minimum of 5 milliseconds settling time when transitioning between sending and receiving. Sharp’s CE-IR2 wireless interface unit may be used to connect the Newton to MacOS or DOS machines, with the appropriate software. The Newton supports four IR software data modes: Sharp encoding, NewtIR protocol (specifications are NOT releaseable) Sharp encoding, SharpIR protocol Plain Serial 38 KHz encoding (“TV Remote Control”) Two interesting items emerge from this answer: • this claims a maximum speed of 19200 baud (presumably for the later models) while specification sheets state that t
