Re: Die shot of the 8500R4 CPU

From: Segher Boessenkool <*segher_at_kernel.crashing.org*> Date: Tue, 27 Dec 2016 13:00:42 -0600 Message-ID: <20161227190042.GB28613@gate.crashing.org> · segher_at_kernel.crashing.org

On Tue, Dec 27, 2016 at 07:14:47PM +0100, Gerrit Heitsch wrote:
> Anyone wants to compare the 8500 and the 8501? Now you can...
> 
> https://siliconpr0n.org/map/mos/8500r4
> 
> 
> I would really like to know why they removed port bit 5 from the 8501 
> while the 8500 has all 8 port bits them.

Because they needed the space for the control circuitry for the GATE pin,
I think.

Segher

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