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 Robotics / RCX / 1845
    Re: Motor Control Register (0xf000) —Juergen Stuber
   (...) In that case, why didn't the RCX designers use an 8 input NAND to decode their addresses, to leave more of the RAM usable? Maybe there werent aware of this possibility? Jürgen (22 years ago, 14-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
   
        Re: Motor Control Register (0xf000) —Mark Riley
   (...) As it is, it seems[1] that two of the three NAND gates in the 74HC10 are being used as a driver for speaker output (it's odd that it's two, not one though). So, this leaves one three input NAND gate to do the decoding. Now that I think about (...) (22 years ago, 14-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
 

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