5 Nov
2012
5 Nov
'12
5:56 p.m.
On Nov 5, 2012, at 8:50 PM, Jules Richardson wrote:
Just looking at some 6502 stuff, and the program counter notes at
http://www.6502.org/tutorials/6502opcodes.html#PC say:
"When the 6502 is ready for the next instruction it increments the program counter
before fetching the instruction."
If you're curious about ALL the internal workings of the
NMOS 6502, you may find the Visual 6502 project quite
instructive:
http://visual6502.org/JSSim/index.html
You can see what every transistor is doing at every
half-clock, along with somewhat more human-readable
annotated traces.
- Dave