Re: Hardware emulation of 6509 using 6502?

From: Segher Boessenkool <*segher_at_kernel.crashing.org*> Date: Wed, 28 Feb 2018 02:16:21 -0600 Message-ID: <20180228081621.GZ21977@gate.crashing.org> · segher_at_kernel.crashing.org

On Wed, Feb 28, 2018 at 01:35:18AM -0600, Jim Brain wrote:
> Thus, it appears the official datasheet is wrong, and has been wrong for 
> 40 years.

Wow.  I have no other words; just wow :-)

> But it does boot.  And, I removed the synthesized clock and just used 
> !PHI2_6509 and all works, as does PHI1_6509 (as defined by the 
> datasheet).  I also removed the '245 buffer on the data pins, and it 
> continues to boot.

Congratulations!

Segher

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