here are the fruits of spending a few days dinking around in hex editing snes simcity...


an interesting land-value altering range in RAM, geiger's snes9x debugger version:

7fab74 to 7fae61     fill this range with 20's or 30's or 40's or whatever floats your boat (22 is nice) and then freeze it and play a map. go click on the landvalue icon (the bag of money) in the mapping window.

some of these other ones I'm not too sure about (actually im not too sure the first one isn't harmless as I haven't played a whole game on it yet)

7f76b8 to 7f826f - fill this range with zeros or other low numbers.. as it is map-wide crime rate. if it acts how it looks, you could play a crimeless city.

7f8270 - 7f8e27 - fill this range with low zeros or low numbers and play pollutionless. (I think!)

7f0200 - 7f5fbf - the range for an entire map (at least on detroit where I tested it..) if you fill the range here with all zeros it will turn your map into basically freeland, but without the mario face, causing every tile to be open land. if you fill it with other numbers, beware... as there are 255 different things to possibly fit in a tile.

if someone expanded and studied on the last range, I bet someone could make a nifty map-editor or map creator for this game. it would take some hefty programming though, for sure. not a skill I have.

lastly, I haven't played a long city with some of these codes and am not sure if they will allow you to play and not crash, or cause other memory problems. I recall editing a game in such ways and permanently disabled it's multi-player feature, which doesn't work to this day. one should be wary of editing out-of-range memory because it can permanently alter your computer! none of these values here are out of geiger's snes9x debugger ram range though.

i'd love to talk with other simcity enthusiasts.... I am still seeking a ROM based address in this game to alter landvalues, to alter the landvalue diamond and not just the overlying landvalue. let me know if you are interested in looking for it!

well, I don't know. it happened when I was editing sierra's hellfiire .exe file, to make a mod. I accessed a range of memory and it crashed, then after it crashed it never worked in multiplayer again. i'll have to reinstall XP if it is ever to work again multiplayer. (there are hacks and stuff which allow hellfire to have 6 char classes and work multi)

but anyway..


a map editor for simcity would be awesome. I wonder if anyone wants to even try that.


can anyone tell me how I might permanently add a fix to the simcity ROM to allow ram addresses 7fab74 through 7fae61 to be permanently set to a desired value? I -think- its possible, isnt it?

Well, if they're RAM addresses, you can't edit the ROM at those adresses. So you'd have to find the routines that set and modify those areas and alter them. Alternatively, you could modify a save state. While it wouldn't be permant, it would be easier.