NQC ("Not Quite C") : 1796


Robotics / RCX / NQC / 1796	1795 \| 1797

Subject:	direct manipulation of bits in RCX registers using NQC
Newsgroups:	lugnet.robotics.rcx.nqc
Date:	Mon, 12 Sep 2005 22:58:48 GMT
Viewed:	5283 times

Hi all, Can anyone tell me if it is possible to use NQC to directly set bits in RCX registers? And if so, how does one do it? I've seen C code examples of this in a few places, but no NQC examples. Specifically, I want to turn on and off the red LED in a LEGO light sensor brick, *without* disabling the light sensor itself. Apparently, the power for this LED is mapped to bits 0-2 of "port 6" (an RCX register). Thanks, Matt Jones

Message has 1 Reply:

		Re: direct manipulation of bits in RCX registers using NQC
(...) Perhaps - but the standard firmware implements a "virtual machine", and so you don't generally have access to physical registers. But... (...) You can configure the input port that the light sensor is connected to as a "passive" sensor (so (...) (19 years ago, 13-Sep-05, to lugnet.robotics.rcx.nqc)

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