 | | Re: BCD
|
|
Mar, The half carry (H) bit in the CCR sets if there is a carry from bit 3 to bit 4: in other words when there is a carry from the low hex digit to the high hex digit. Only the DAA instruction is affected by the state of H. For example: LDAA #$5A (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Re: BCD
|
|
Yeah, it helps alot. Thanks. I guess the half-cary is for adding to the next significant 4 bit word. And the current word, including overflow, is then subtracted by ten (1010), if the half-carry is flaged, to yield the proper BCD word. Is this what (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | RE: LCD Panel Substitute
|
|
I recently got mine from Marshall (www.marshall.com). When I ordered mine about a month ago, they had a bunch of them in stock. .... Jim Montague ---...--- From: Bill Conroy Sent: Wednesday, April 02, 1997 3:19 PM To: handyboard@media.mit.edu (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | LCD Panel Substitute
|
|
I am having an extremely difficult time finding a source for the Hitachi 16x2 LCD panel. I am wondering what an appropriate substitute would be. I am looking at the following part from page 53 of the Mouser Electronics Purchasing Manual #58: Mouser (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Re: BCD [DAT]
|
|
(...) As far as BSD goes; every decimal digit is represented by four binary digits: decimal BCD 0 0000 1 0001 2 0010 3 0011 4 0100 5 0101 6 0110 7 0111 8 1000 9 1001 so that a number like 3725 would be represented by 0011 0111 0010 0101 I've never (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | BCD
|
|
Does anyone know the details of how a BCD number is stored? I'm unsure as to what a "half-carry" is in HC11 CCR. It would be great if someone can provide a little example. :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Shaft Encoders
|
|
One of the advantages of using a shaft encoder is: For you to get the same "resolution" as a shaft encoder with a potentiometer, you must have a very precise pot. Some optical encoders can have 500 "ticks". But... a normal encoder does not tell (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Robot classification
|
|
Katt, Good question, and I liked Tom's response. If I may I'll add my two cents. From Tom's list: (...) Definitely and its not the kind of software they teach these days. When's the last time a program crash in your CS-101 class put a hole in the (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Shaft Encoders
|
|
Does anyone see a problem with using the pot thats built in a RC servo as its shaft encoder. I have modified it so that it makes contact once every revolution. Would this mechanical contact create any "bounce" that would interfere with the enoding (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Robot classification
|
|
(...) Kat, That question is one that a LOT of schools are asking right now. At the present time (in my opinion) it is a blend of different kinds of engineering, which is very much determined by the type of project that your doing. For example, (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
|
