Solved

Motorola 68000 Processor (CCR:V)

Posted on 2009-04-14
3
484 Views
Last Modified: 2013-12-10
Hi,
I do not quite understand the V(overflow) in the CCR of the motorola 68K processor.
I hope someone can explain to me in details of it.
Thanks in advance.
04/15/09 Added Programming Languages and Assembly Zones - Callandor, Hardware Zone Advisor

Open in new window

0
Comment
Question by:csharp_learner
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 26

Accepted Solution

by:
PCBONEZ earned 500 total points
ID: 24136402
I'm not a programmer but I'll try.
The V-bit is set when the most significant digit changes.

[imaginary counter]
000 - initial condition
001 - not set
010 - not set
011 - not set
100 - set
101 - not set
110 - not set
111 - not set
000 - set
0
 

Author Comment

by:csharp_learner
ID: 24144511
If there is an Add or Sub(Byte/Word/Longword) involved is the above concecept still applicable?
0
 
LVL 26

Expert Comment

by:PCBONEZ
ID: 24146188
I was just trying to add another brain to this as no one else tried.
But, you are already getting beyond the programming capacity of this non-programmer's brain.

I think what you are looking for begins on page 149.
http://books.google.com/books?id=JPi9zrjFzMEC&pg=PA151&lpg=PA151&dq=Motorola+68000+overflow+ccr+v&source=bl&ots=K_S4Q1WaaH&sig=owt9L9VTfQ1YkrgSLbi4hoeqff0&hl=en&ei=M57lSfKQBKGCtgPd1OWWBA&sa=X&oi=book_result&ct=result&resnum=9#PPA150,M1

You might wanna ask a mod to move this into a programming zone. Us hardware guys lurk in "CPU Processors" and your question is a programming question. You'd get a better response in another zone.
- Use the "Request Attention" Link.
0

Featured Post

Enroll in June's Course of the Month

June's Course of the Month is now available! Every 10 seconds, a consumer gets hit with ransomware. Refresh your knowledge of ransomware best practices by enrolling in this month's complimentary course for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The purpose of this article is to demonstrate how we can use conditional statements using Python.
On Beyond Tools A conversation I recently had with the DevOps manager of a major online retailer really made me think about DevOps monitoring tools (https://www.onpage.com/devops-incident-management-tool/). The manager and I discussed how sever…
This video teaches viewers about errors in exception handling.
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question