[NTLK] Wired article

[Jeff Sheldon]

Aside from serial implementation, one thing I was hoping to discover from these tech sheets is a hint at any test modes or data console pins revealing chip activity.  What I've seen so far isn't especially useful, but let me know if you spot anything promising as I have some disembodied chips and protoboards to probe them with. We might even be able to datalog chatter between chips. 


-Jeff

> On Feb 12, 2017, at 03:27, Matthias Melcher <mm at matthiasm.com> wrote:
> 
> 
>> On Feb 12, 2017, at 3:31 AM, Jeff Sheldon <jeffsheldon at gmail.com> wrote:
>> 
>> This might be a red herring, but I wonder if the CL-PS7110 datasheet might be helpful. 
>> 
>> http://pdf.datasheetcatalog.com/datasheet/Cirrus_Logic/mXqzxsy.pdf
>> 
>> It's a later revision (1997), sure, and an amalgamation of what was originally separated into separate chips, but I wouldn't be surprised if they used a similar design for serial I/O.  I believe the 7010 talked to a LTC1323 chip to handle RS-422.
> 
> Good catch, but it is missing many features of the Newton setup. I could not find any documentation of DMA for serial ports, which is what I am currently working on.
> 
> I did find the documentation for the ARM SA-1110, which is the successor of our SA-110 CPU, but designed with all the peripherals on the chip. Reading the docs, it feels like ARM used the Apple requirements for Cirrus to design the integrated peripherals. Maybe it was already in preparation of a MessagePad 3000?
> 
> And although it does not provide any useful addresses for the hardware registers, it does give a very complete overview of the registers that are needed to control most f the peripherals.
> 
> http://www.alldatasheet.com/datasheet-pdf/pdf/82534/INTEL/SA1110.html
> 
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