 | | Re: Drive R/C Servos with the RCX and pbForth (long)
|
|
(...) If you're using a custom motor driver in pbForth, why use the inverter circuit at all? Why not just generate the desired waveform directly? Is there not enough current to drive the servo that way? --Ben (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
|
| |
| | Drive R/C Servos with the RCX and pbForth (long)
|
|
Hi again everyone! A few days ago I announced that I had developed a nice little circuit using easily available parts that would let you connect servos to the RCX - with no external batteries or microprocessors or anything! At that time, I said that (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
|
| |
| | Re: How much memory finally?
|
|
Here's the latest update. Hope we will get a clear picture of this #@$@ memory after all. The point is that the RCX processor can address 64k of memory, so let's divide this range into 4 equal area of 16k. (note:16k or 16384, in hex is 0x4000). (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | Re: How much memory finally? ADDENDUM
|
|
I have seen some systems that have RAM set up this way: The first area is for the system, the second area is user programs and is allocated from the bottom up. The third area is user (and system) data, allocated from the top down. They "meet in the (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | Re: How much memory finally? ADDENDUM
|
|
Hey, that's a pretty nice idea! Any volunteer? D. (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | Re: How much memory finally? ADDENDUM
|
|
I haven't seen anyone talk about hacking a memory expansion (hardware) yet. Dennis (...) -- Dennis Williamson - Certified Y2K Complacent Bad News: The next millenium starts on a Monday. Good News: You get the day off. (remove .NO and SPAM. to reply) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | Re: infrared communication
|
|
(...) I dont know what the max distance for two RCXs is. But i have had the infared transmitter as far as 40 feet from the RCX, with no obstructions in the way and they still communicate. I would bet they have a pretty good range. Jeff (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | RE: How much memory finally? ADDENDUM
|
|
(...) There is no user memory from 0x4000 to 0x8000 - It's all ROM space but it might not be used. I look at things in terms of replacement firmware, and the RCX is very flexible in this regard. The RAM for replacement firmware starts at 0x8000. (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | infrared communication
|
|
What is the maximum distance for infrared communication between two RCXs (say with new batteries)? Do the RCXs have to 'face' each other? Thanks, Michael (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
| |
| | Re: How much memory finally? ADDENDUM
|
|
Well, I checked with Kekoa's memory map, and indeed, thinks are not as simple. And Dave was right (Why did I doubt is sacred words?) Memory is divided into three main area of 16k. The first is ROM, containing the base programs. The two other (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
|
