[NTLK] Newton ROM card circuit board files reverse engineered

[Jeff Sheldon]

Matthias,

This is exemplary work.  I was taking a very similar approach with the 2100 mainboard (stripped, sliced, duplicated traces), but stopped abruptly some years ago. I was actually considering starting up again with the ROM board this week, so I'm glad you announced this.  Custom ROM deployment has some pretty major implications. 

Congrats on the successful reversing, PCB design and unexpected solid write-up.  Documentation is a lost art. 


-Jeff

> On Feb 19, 2017, at 16:53, Matthias Melcher <mm at matthiasm.com> wrote:
> 
> 
> Not much happened in hardware in a while? Well, here is the complete ROM circuit board reverse engineered and put into an Eagle PCB and (still to be cleaned up) schematics file. Some additional findings in the text.
> 
> http://www.matthiasm.com/romCard.html
> 
> 
> This is the card I am talking about:
> 
> http://www.matthiasm.com/img/mp2x00_rom_slot_fl.jpeg
> 
> 
> Starting the reverse engineering:
> 
> http://www.matthiasm.com/img/0E2098C9-649F-4E84-ADB0-1036A36F2568_fl.jpg
> 
> 
> The PCB, ready to send to manufacturing (if anyone ever wanted to)
> 
> http://www.matthiasm.com/img/87A89BE1-1F21-47EC-A5DC-C7A5D3489A16_fl.jpg
> 
> 
> What is the practical application? Well, we can add 8MB of internal flash with this board, and create new and improved ROM images that include the Y10k fix, for example, or just have fun understanding PCBs ;-)
> 
> - Matthias
> 
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