The 6502 CPU's overflow flag explained at the silicon level
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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zima
Member since:
2005-07-06

Such absolute domination of Z80 is not really the case any more - a lot of Chinese media players (especially those with more processing power requirements; like, when needed for emulation, or software decoding of various media formats) come with RockChip SoCs. And that's ARM.
http://en.wikipedia.org/wiki/Rockchip
http://www.rockbox.org/wiki/RockChip

I suppose in the simplest devices Z80 is still a fairly safe bet - like in S1 MP3 players: http://en.wikipedia.org/wiki/S1_MP3_player

Edited 2013-01-16 19:20 UTC

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