Linked by Thom Holwerda on Tue 15th Jan 2013 22:29 UTC
Hardware, Embedded Systems "In this article, I show at the transistor and silicon level. I've discussed the mathematics of the 6502 overflow flag earlier and thought it would be interesting to look at the actual chip-level implementation. Even though the overflow flag is a slightly obscure feature, its circuit is simple enough that it can be explained at the silicon level."
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Comment by Kroc
by Kroc on Wed 16th Jan 2013 13:56 UTC
Kroc
Member since:
2005-11-10

Yes, 6502s are still in use today in the embedded space. Search for "65C02", there's also the 16-bit version "65C816".

Edit: That was supposed to be a reply to above, I got confused with the silly interstitial log in form.

Edited 2013-01-16 13:57 UTC

Reply Score: 3

RE: Comment by Kroc
by Thom_Holwerda on Wed 16th Jan 2013 14:41 in reply to "Comment by Kroc"
Thom_Holwerda Member since:
2005-06-29

Edit: That was supposed to be a reply to above, I got confused with the silly interstitial log in form.


Yay Kroc, you just justified all our efforts for OSNews 5 ;) .

Reply Parent Score: 2

RE[2]: Comment by Kroc
by Kochise on Wed 16th Jan 2013 16:29 in reply to "RE: Comment by Kroc"
Kochise Member since:
2006-03-03

So, disable the "mobile" version alltogether, it's just plain silly on my Google Nexus 7 using Opera. When I scroll at the bottom of the page, the text disapears and it's hard to select "desktop version" at random.

Kochise

Reply Parent Score: 2

RE: Comment by Kroc
by Valhalla on Wed 16th Jan 2013 16:30 in reply to "Comment by Kroc"
Valhalla Member since:
2006-01-24

I did some brief programming on the 65816 back in the day (it was used in the Super Nintendo amongst others).

I remember going like 'yay, a 6502 with 16-bit registers!', unfortunately as I recall there were no separate opcodes for using 8 or 16 bit registers so instead you had to switch between 8/16-bit by setting a 'mode' bit in the status register with rep,sep instructions which quickly became tedious.

Reply Parent Score: 2