Lpc2000

> Well, you could read it into Philps SW and have calculate the 
checksum and 
> write in back out again.  I think that works anyway.  I'm not sure 
I see 
> the point though.

Well the IAP updater that I'm working on reads the hex file and 
reprograms the lpc with the new code. 

If u look at the hex file example...
:1000000018F09FE5FEFFFFEAFEFFFFEAFEFFFFEAB2
:10001000FEFFFFEAFFFFFFFFF0FF1FE500F09FE597 <---0x0014 is "FFFFFFFF"
:10002000A48C000028950000FFFFFFFFFFFFFFFFEB

...my concern is that the vector checksum in the hex file isn't 
generated. I'd rather have the IAP updater do a vector check (before 
programming the reset block) instead of just calculating & storing 
the vector sum. The latter seems to assume that there are valid jump 
commands in the reset block.

Leighton