This is a DOS emulator for the game Pitfall II by Sega. It is still unfinished:and it won't be completed soon,as I am leaving for a one month holiday right NOW. As usual this emulator isn't to be distributed with rom images from the original coin op. The emulator requires the following ROMS in directory PITFALL2 to run: ^^^^^^^^ epr6454a epr6455 epr6462 epr6469a epr6470a epr6471a epr6472a epr6623 epr6624a epr6625 epr6473 epr6474a (sound rom epr6462 is not required,since sound isn't emulated at all) FEATURES Pitfall II isn't playable now,the reason being the emulator being largely unfinished. The original game uses hardware collisions,and so far I haven't written any emulation code to handle this.Pitfall II uses a combination of hardware and software to control which sprites have undergone collisions...as a general rule the game code checks the collision registers,and then looks at the sprites' coordinates to guess which object Pitfall has stumbled into.Problem is that in some screens the coordinate check is always positive,or isn't performed at all: as a result Pitfall dies as soon as the scroll stops.Further problems arise from bonuses being picked up even if Pitfall isn't touching them (watch your score really explode!).Look for screens with swinging ropes...Pitfall will cling to them as soon as he jumps,no matter where he is! I think none of the game sections can be played to the end due to collision problems...with some fiddling you can get through the pond with TWO ropes,but I doubt the pond with moving trunks can be succesfully tackled.As for the section with flying ballons,Pitfall simply can't catch them. I provided a rough way to let you roam peeking at the game:pressing the TAB key will clear the collision tables,so that any collision won't be detected...this will allow Pitfall to not die istantanously on some screens.Moreover Pitfall II can be set to start off in different stages via dip switches settings:so you can even finish the game by walking in a passage next to the game's end,and activating collisions to grab the crown without touching it (how sad...). I guess I'm missing the game's color proms too,so the game palette isn't arcade perfect:I made some tentative colorscheme,and stored it in the palette.bbm file,you can edit it if you wish (it's a DPAINT brush file). Graphics rendering isn't complete:the game logo isn't displayed (the sprite format it uses differs from the others' sprites),and tile updating for color cycling isn't implemented yet (this means ill colored lava-ponds and strange stripes in the sky). Emulator has no sound,no joystick support,no frameskip and I think it's also slow...but it's not meant to be played:when I'll make a playable version I'll optimize the code. KEYBOARD CONTROL 1....................player one start 3....................insert one credit 5....................test switch 6....................service switch ARROW KEYS,ALT.......joystick and firebutton emulation TAB..................collision table on/off F1...................reset game to start at beginning of section 1 F2...................reset game to start at beginning of section 2 F3...................reset game to start at beginning of section 3 F4...................reset game to start at beginning of section 4 ESC..................quit emulator TROUBLESHOOTING On my computer it works ;> If on yours it doesn't,please consider checking if all of the required roms are in the correct directory (i.e. PITFALL2),and have the correct names. This emulator is DOS based.This means that it will run better under DOS than that in a W95 DOS box:on the contrary I can't guarantee it will function at all...someone sent me an e-mail addressing the G&G emulator I wrote as "very W95 hostile",but it worked quite happily under my PC's W95 installation! Has anyone got any information on the following SEGA games? Choplifter Flicky Spatter Teddy Boy Wonderboy II I believe their hardware is similar to Pitfall's,but I don't own their romsets,so this is nothing more than a guess. Roberto jdoe@micronet.it ACKNOWLEDGEMENTS I wish to thank: Ishmair,for a great Z80 engine. Adam Seychell,for a great DOS extender package. Dave Spicer,for a great emulator(Starforce...hmm...source of inspiration!) And anyone who appreciated my work with Ghosts'n Goblins!