Main thread: 6509 dissected
Another dissection brought to you by ttlworks and Frank Wolf.
While we did the first 6509 dissection, we had focused on what makes the 6509 different from the 6502.
That's why he had ignored the pins\pads: RES#, NMI#, IRQ#, RDY, SYNC,
since the logic attached to these pins is supposed to be more or less identical to what's in the 6502.
And that's why we do them now.
For consistence with Frank's notation, low_active signals are named foo#, not /foo.
Orientation for all the chip pictures: PHI1(in) is North.