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Overclocking the Stock 6502c: Is it Possible?

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Might be interesting to scope pin 34 and see if there is any output.

 

Yeah, I guess comparing pins 34 and 36 would be a good thing.  :)
 

So, I looked at the early CPU board schematic.   I see how the HALT works.  This won't be a problem implementing.  It's just a simple condition.

 

Edited by JimDrew
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On 6/30/2019 at 1:05 PM, CharlieChaplin said:

Bob's XL-7 was taking part in the Abbuc hardware contest 2008. Attached are the pics and other stuff which Abbuc got for the contest...

hw2008-65816cpu-speeder-bob-woolley.zip 10.98 MB · 9 downloads

 

Thanks for posting the info. Was there ever a schematic or the CPLD code released as part of this?

 

On 6/30/2019 at 1:13 PM, JimDrew said:

Yeah, I guess comparing pins 34 and 36 would be a good thing.  :)

If you look at the schematic I posted earlier, you'll see that I don't have any connection to pin 34, or even show it on the CPU component since I considered it a no-connect with anything on the die.

 

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Best Electronics has both the C014377 for $6.95. The C014806 is $8.00.

 

14377 = 6502B, 14806 = Sally.

 

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On 6/28/2019 at 9:22 AM, guus.assmann said:

Hello,

I have made a PCB, many years ago, that made it possible to use a 65C02 in the XL's or XE's.

And the XL7 is already in this forum, look at the attachments I put in.

Schematics and source code are there. Just needs some sorting out. There's "logic" in the file names.

 

BR/

Guus

 

For some reason I completely missed the schematics and the source code when you first posted this (my brain must have been stuck in a 'wait state'). Just now looking over what you uploaded, and it looks very thorough . Thanks for taking the time to upload all this great information 👍 .

 

LINK to that upload.

 

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