6502.org Forum  Projects  Code  Documents  Tools  Forum
It is currently Mon Oct 07, 2024 6:22 am

All times are UTC




Post new topic Reply to topic  [ 3 posts ] 

Is the attached file worthy of inclusion at 6502.org?
Poll ended at Sat Apr 28, 2018 12:15 am
yes 0%  0%  [ 0 ]
no 0%  0%  [ 0 ]
maybe 100%  100%  [ 1 ]
Total votes : 1
Author Message
PostPosted: Sun Jan 28, 2018 12:15 am 
Offline

Joined: Sat Jan 27, 2018 11:55 pm
Posts: 2
Hello. As a 6502 newbie, one of the first things I have done is study the op-codes. As a result, I have an op-code chart that I would like to share. How do I do that?


Attachments:
File comment: This is the chart I would like to share.
65xx-op-codes-periodic.pdf [52.46 KiB]
Downloaded 191 times
Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 28, 2018 2:17 am 
Offline
User avatar

Joined: Fri Aug 30, 2002 1:09 am
Posts: 8522
Location: Southern California
Hi, and welcome! This kind of thing might be helpful, and the page is quite attractively done. Can I encourage you to add the CMOS instructions and addressing modes. The old limited NMOS 6502 has been out of production for decades, but the CMOS continues on with no end in sight, with a lot of benefits. The many improvements are summarized at http://wilsonminesco.com/NMOS-CMOSdif/ . You could put their text in a different color if you want to show that they're not in the old NMOS set.

I did not proofread the whole thing, but as I was trying an example of how to use it, I looked at op code $64 which is STZ ZP, but occupying its spot is ADC ZP which should be $65 instead. As I was trying to figure it out further, I see ASL ZP is at 05 which should be ORA ZP, and ASL ZP,X is $15 which should be ORA ZP,X. The ones with lsn=6 are missing, even though they're in the NMOS, unlike the ones with lsn=7, B, and F.

Thanks.

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?


Top
 Profile  
Reply with quote  
PostPosted: Sat Feb 10, 2018 3:49 am 
Offline

Joined: Sat Jan 27, 2018 11:55 pm
Posts: 2
Thank you for taking an interest. Looking at the chart again and comparing it to my reference document, I do see some flaws---e.g., incorrect op-codes---(that's what I get for working on this in the wee hours of the morning!)---thank you for pointing that out.

Consider the original file post a draft, then.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: