Now what?

[JTesta1966 at aol.com]

In a message dated 5/25/99 5:19:57 PM Eastern Daylight Time, 
mpitts at netspeak.com writes:

<< Assuming the EPROM starts at 0x4000:
 
 XXXX: 00 0C 00 0D 40 00 40 02 01 1D 00 E0 00 01 
 
 The above data could be reformatted to read:
 
 000C <- A RAM address
 000D <- A RAM address
 4000 <- A ROM address
 4001 <- A ROM address 
 011D <- A RAM address
 00E0 <- A RAM address
 0001 <- A RAM address >>

Mike..how do you figure OUT that ones a ram addy, ones a ROM addy? Is it the 
address/value that hints it? or is it the range of addresses that you KNOW by 
having experience?

<<Then, if you know what the scan tool format is for the 
particular application, you can reverse it as follows: 

If the scan tool receives (FLAGS, FLAGS, CHIP ID, MAP, TPS, FLAGS, ...) 

Your table would be:
000C <- FLAGS
000D <- FLAGS
4000 <- CHIPID HI
4001 <- CHIPID LO
011D <- MAP
00E0 <- TPS
0001 <- FLAGS>>

If you know how a scan tool works? You mean as in authoring turbolink kind of 
know? Like spectrum analyser? or the actual programming part? Where can a 
dimwit like me find this info? And would it apply to broadening my horizons 
to different cars?

<<
You won't need to look at any asm code to do this kind 
of reversing work>>

Sheesh..you guys are WAY above my head. I'll go back and just read awhile ;-P

Jim