Engine RAM Mapping

[Mark DiVecchio]

With the help of a few of you, I've been able to figure out how to access the RAM memory in the engine and what some of those memory locations mean.

Some words on my web page and a link to the current version of a document that writing.

http://www.silogic.com/trains/RTC_Running.html#RAM

Mark

[Paul Reynolds]

>>> “I figured this out just by looking at the RS-232 stream over the radio. No code disassembly, no logic analyzers, no opening up of Remotes or TIU's. ”

I'd say this disclaimer will keep you in good stead.

Paul R.

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[Eric Linz]

Mark,

I have dumped the TIU firmware S record data and looked through the .text data before the code sections and found a couple extra q commands.  I have included some other text strings found around the q codes, it could be related, or it could be part of data needed by another function.  Stuff in ( ) is the converted code to ram address and position using your description for the format.

Following the text "Attempting recovery":

q7F88 (addr/pos=0x11/1)

q1F88 (addr/pos=0x10/0; this and the one above used together?)

q7F89 (addr/pos=0x13/1)

q1F89 (addr/pos=0x12/0; this and the one above used together?)

Following the text "LASH-UP ENGINE"

q3E10 (addr/pos=0x321/0; used by itself?)

q3E11 (addr/pos=0x323/0; used by itself?)

Followed by text:

EXTERNAL MIC OFF

EXTERNAL MIC ON

It also looks like your addr->q conversion can go up to 14bit addresses. Have you tried reading 16K, or does it return errors for those? Did you notice a copy of the Ixxx softkey data in there too?

Eric

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Eric Linz
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