4 Jan
2005
4 Jan
'05
4:07 p.m.
On Mon, 3 Jan 2005, John Foust wrote:
If the program binary sent over the serial line
didn't include
any characters that were eaten or rejected by COPY, and it
ended with a CTRL/Z and COPY stopped there, it would work,
wouldn't it?
This reminds me of the constraints on today's exploits and code
injection techniques: "write a series of three progressive
exploits and loaders that fit in 64, 256 and 512 bytes,
respectively, and do not contain any zeroes."
That sounds a bit much for the task at hand... !
At 02:37 PM 1/3/2005, Tom Jennings wrote:
debug will assemble for you! It jsut won't do symbols.
I am surprised that no one pointed out that the input, store, incremnt
could more easily be done by:
mov dx, DATAPORT
...
es:insb
djnz label
Hell, with debug you could WRITE the program to
input the file
in binary! We're talking MSDOS, right? Not Windows?
You can type this crap directly into debug, "aXXXX".
Go for it, Skippy! When it's debugged and tested, ship it! :-)
As the hex to enter into DEBUG.
You're right - the program for this would be small enough to
fit in the margin of a FAQ. "Load and run from the serial port."
- John