Using the Debugger on Other Games
From: email@example.com (Ed Federmeyer)
Subject: Activision's 2600 Development Station!
Date: 21 Mar 1995 20:56:16 -0600
Organization: Illinois Institute of Technology, Chicago
In article <firstname.lastname@example.org> email@example.com (Glenn Saunders) writes:
>The mortal Scott Butler wrote:
>: It'd be interesting to try to use the emulator as the basis for a new,
>: PC-based development platform for the 2600. I'd be very interested in
>: developing 2600 games, if there were a good PC-based development
>: environment around....
>You could use a 6502 cross compiler and download code to the Starpath
>Supercharger. That's what I'll encourage when the Starpath CD is released.
>And you'll have 6K RAM to work with rather than just the standard 4K ROM
>and you can write multiloaders that way ;)
I finally found a copy of the 2600 action pack in the Chicagoland
area: Babages in the North Riverside Mall to be exact. This is a
seriously cool program!
After playing with it a bit I've found the following:
1) You can copy 2600emu.exe to debug_x.exe (for example). Use a HEX
editor on debug.exe to change "PITFALL.BIN" to "DEBUG_X.BIN" (again,
for example) Create a new program icon in Windows to run the new
Now, when you run the debug_x.exe, It will give you the "debug"
pulldown menu, and load DEBUG_X.BIN instead of PITFALL.BIN.
Note: If there is an easier way to load your own binary image instead
of PITFALL.BIN, please let me know! My Debug/Open Cart Image...
pulldown menu doesn't do anything!
2) To create debug_x.bin, use your favorite 6502 cross assembler to
assemble your test-2600 code. You might need a utility of some kind
to convert the OBJECT file produced by the assembler into a raw BINARY
image, suitable for burning into a 4K EPROM. (This kind of utility
would probably come with an EPROM burner, but maybe there is something
out there you can use???) Once you have a 4Kb EPROM image, copy it
four times!!! Ie: COPY /B test.bin + test.bin + test.bin + test.bin
debug_x.bin (Notice that all the .BIN files that come with the program
Now you can step through your code, set breakpoints, etc.
When you run your debug_x.exe, it will create a debug_x.ini with some
minimal default values. You can look at the other *.ini files to get
an idea of the other setup values you can play with.
I sure wish I had this when I was developing SoundX and Edtris 2600!!!
Good Luck, and have fun!
Atari 2600 Action Pack information.
Moved to HiWAAY: 2 Jul 1996; Last Modified: 2 Jul 1996