legOS : 2947

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Subject:	Re: Motor Control Register (0xf000)
Newsgroups:	lugnet.robotics.rcx, lugnet.robotics.rcx.legos
Date:	Wed, 13 Nov 2002 22:37:55 GMT
Viewed:	322 times

Mark Riley <markril@hotmail.com> wrote: > So, I wrote a little test program that wrote a unique > pattern to all memory in the range 0xf000-0xfb7f. > I then inspected the memory, and sure enough the > entire pattern was intact. It turns out that the entire > range is RAM, even the address 0xf000! This is interesting. It makes sense that the memory backing these locations still works, but I never would have thought to try to use it. I will make a note of this on my pages. -Kekoa

Message has 2 Replies:

		Re: Motor Control Register (0xf000)
It also turns out that there are 8 bytes of external RAM that peek through at addresses 0xff80-0xff87. Writes to these locations also affect the motor control register. I suppose there's a small advantage in using these registers to control the (...) (24 years ago, 14-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)

		Re: Motor Control Register (0xf000)
(...) While you are at it you could also make a remark near the explanation of the f000 motor control register, and make it clear that this is a hardware function. When I started to use this extra memory in leJOS I missed the remark at the very end (...) (24 years ago, 14-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)

Message is in Reply To:

		Motor Control Register (0xf000)
Seeing as how there's been little traffic here recently, I thought I'd post about something I found that's cleared up a little mystery (for me at least). It concerns the RCX register that is used to control the motors. This register lives at 0xf000. (...) (24 years ago, 13-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)

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