[NTLK] Designing an Internal WiFi Board for MP2x00

Jake Bordens jake at allaboutjake.com
Tue Mar 31 20:04:37 EDT 2015

>I have a feeling that there is something slightly wrong on the MessagePad hardware side. I have seen the domino modem line and I wonder if even Apple knew that something is not working. Was the internal modem ever released? If not, maybe that's exactly why it could not be released?

I hadn't seen that video.  Funny and sad at the same time.

I was excited today to rediscover a constant in the DDK headers:

#define kHWLocBuiltInExtra			'tblt'

I say "rediscovered" because Simon mentions it in a post in 2010.  Sadly, though it doesn't do what I want it to.  Based on some scope probing, this is the hardware location of the 
Serial2.  I guess that's useful information to know.  Serial 2 is exposed on the internal connector.

I don't know why, but I have it in my head that Serial Port 2 is used for the keyboard.  I don't know why, so <citation needed>

Its one more piece of info about the internal serial slot, but doesn't get me closer to keeping the SerialPortSel3 high on open.

My latest thinking is that the SerPortSel pins may be configured in VoyagerPlatform::PowerOnSubsystem().  This function does call SerialPort0LineDriverConfig and SerialPort3LineDriverConfig.  I haven't reverse engineered the entire function though to see what it is actually doing.  Nor can I find anyhwere that it is actually called... But my disassembly is pretty incomplete.

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