RJP1138

Things like the Wico sticks and the masterplay (clone) have tuning potentiometers because different games on the 5200 have different voltage values for the center position. Is this an issue for this new controller? Does it just take the median best fit values for center so that it works "well enough" for most games? Isn't there also a potentiometer in the console itself that affects controller behavior depending on how it is turned?

Phil, I would also like to get a complete set of overlays please!

I will take two please!

Nukey, using the -pafs command line argument did the trick! Look at that. "My" first hack. Thanks guys! Now, at this pace I wonder how long it's gonna take to figure out how to make those berzerk robots fire diagonally in an intelligent manner?

My source file is just the space war rom run through DiStella v3.01a. command line: distella spacewar.bin

It just says complete.

Still 240 bytes. DASM v2.20.11 unofficial 20140202a

Command line: dasm spacewar.asm -ospacewar.bin -v1 Original ROM size: 2KB Distella disassembled file size: 24.8KB Input source file size: 24.8KB Output bin file size: 240 bytes ????

Fantastic guys!!! Thank you for the quick and detailed responses. I was searching for COLUBK but didn't find it, so I figured it had to be something indirect like this. I wanted to go brute force and just change each mention of $D0 to $00 one at a time until it worked and feel gifted, but none of the compiles loaded. The closest match to COLUBK by word search was COLUP0. It's an array? What follows is my approach to this like a kindergartener calling natural phenomena Mr. this and Mrs. that. So if I got this straight, COLUP0 is the color array, whose 10th slot is the background color, which is loaded from a vector named LF7C3, whose values are defined in a backwards counting do-while loop named LF02B? Rybags, by offset, is that like in Fortran where the position of the start of the text in each line can be important? And the vectors? You know what, I think I need to go through Andrew Davies' guide in its entirety. This stuff should be in there right?

I am trying to hack Space War to have a black background instead of green. I found a sparsely commented code, but it isn't verbose enough to clue me in on what to change. I have programming experience in languages like C and basic, but I don't know assembly. Also, when I try to recompile the unaltered code with dasm, either with or without vcs.h and macro.h, I can't get the resulting bin file to run in an emulator. Could someone please help?

Thank you Nukey. Time to learn about hacking roms......