Dav
-
Content Count
353 -
Joined
-
Last visited
Posts posted by Dav
-
-
I haven't really noticed much difference in the bug in puc/pac vs ms pac. But I would think the speed could affect the odds some. BTW the pucman in mame is actually a bootleg, they don't have the correct roms for pucman.
You are right the safespot isn't very safe and the reduced movement areas are only part of the reason for the safe spot.
Here is the difference in the pacman harder roms, it's not much.
Comparing files pacman.6e and PACMANH.6E 00000843: 14 0F ;unused data; 00000844: 1E 14 00000845: 46 37 00000846: 00 04 ;level 1 ;for when ghosts start out of box 00000847: 1E 18 00000848: 3C 34 00000849: 00 02 ;level 2 0000084A: 00 06 0000084B: 32 28 0000084D: 00 04 ;level 3 0000084E: 00 08 00000FFF: 36 54 ;checksum Comparing files pacman.6h and PACMANH.6H 00000795: 29 00 ;pink ghost ai, cuts leadtime targeting in half. 0000081F: 40 24 ;orange ai, cuts distance to pac for stupid behavior 00000FFF: 4C 91 ;checksum Comparing files pacman.6j and PACMANH.6J 000007F8: 30 31 copywrite 1980 1981 00000D28: 30 31 00000D43: 30 31 ;the checksum is unused on midway's 6j
I also have the pacplus power pellet timing table if you want it, but I've posted enough useless trivia for one day.
-
The collision detection bug is the same in all the pacs. The problem is the locations for collision detection are stored as tile positions not pixel locations. So if you step off of one tile in the same frame as a ghost comes onto the tile you just left you are never on the same tile. Some sample code below.
------------------------------------------ red ghost collision 1753 3aac4d ld a,(#4dac);red ghost mode;1=eyes 2=in box 0= out 1756 a7 and a 1757 2009 jr nz,#1762 ;skip if not dangerous 1759 2a314d ld hl,(#4d31);red ghost tile position 175c a7 and a 175d ed52 sbc hl,de ;de=pacman tile position 175f ca6317 jp z,#1763 1762 05 dec b ;dec ghost counter ------------------------------------------ collision routine----------------------- 1763 78 ld a,b ; b= 0 none, or ghost number 1-4 1764 32a44d ld (#4da4),a; store number of ghost. 1767 32a54d ld (#4da5),a 176a a7 and a 176b c8 ret z ; no colision, return
If you change byte $68 of prom 4a to 01 from 00 you will see all the limited movement areas as red. That code is completely different from pac to ms pac. Pac uses spare color pallets to flag the areas, ms pac uses the extra high bits in the color to store this and the slowdown areas.
Dave
-
Not too much left to complete in this game' date=' except a routine to keep monsters from travelling up the small passages above the center box.Because collisions are only checked once every 4 frames, there is a slight chance of passing right through a monster. This should only happen occasionally during head-on collisions.
[/quote']
Very nice. On the arcade if you charge a monster there's aproximately a 1 in 8 chance of going through it so that is correct. It's due to the way positions are stored though, not for lack of checking.
The no traveling up applies to the lower area where pac starts out too. That's part of what creates the "safe" spot.
Dave
-
It only uses the lowest 2 bits for direction, so I suppose you could chop it by 1/4 right off the top. It resets every level so you could probably cut that down. Or you could trap the significant attract mode reads. During the game no one will know the difference unless they run their pattern with a tolerance to match the frame rate. But as long as you have the space...
Thanks, Nukey I need to write that down.
Dave
-
But passing it off as an original!
now thats what I call a rip off!Yes, the other thing that bothers me is they're aimed primarily at operators. The last auction I went to had 1 real galaga/mspac and 4 of these games with boards running mspac/galaga/donkey kong. So they are competing directly with Namco. It's just a matter of time before Namco comes down hard on these guys. Hopefully it won't drag down emulation in general.
-
With a pizza arcade the investment suddenly gets much larger as do the hassles. And I'm then required to be there a lot for it to be open. I wouldn't mind being there for 2 hours a day after school though.
-
---------------random number generator------------------------
4dc9,4dca is the seed number out 4dc9 is new seed, a=rnd(0-ff)
2a23 2ac94d ld hl,(#4dc9) ;load seed number
2a26 54 ld d,h
2a27 5d ld e,l
2a28 29 add hl,hl
2a29 29 add hl,hl
2a2a 19 add hl,de
2a2b 23 inc hl ;hl=5 x seed +1
2a2c 7c ld a,h
2a2d e61f and #1f ;drop bits larger than $1fff
2a2f 67 ld h,a
2a30 7e ld a,(hl) ;read byte from 0 to $1fff
2a31 22c94d ld (#4dc9),hl ;store new seed number
2a34 c9 ret
The Roms are the lookup table. Many changes and the attract mode is different. The ghosts aren't random all the time just some of the time.
Dave
I can never remember how to keep the columns straight
-
Very nice. Just curious, how are you handling the random number generation for pacman? Will you be able to duplicate the arcade version? I'm guessing you probably don't have an extra 8k to build a table.
You could do it in a lot less if you rewrote the routine, though. But still, it would take a lot of space relatively. -
I thought about it. I live in a small town and the rent on one of the buildings downtown is fairly cheap. Definately less than storage units equal to that size. Of course there's still the electricity, and who knows what kind of hoops the city would make me jump through. The liability insurance would probably kill the deal.
-
Anti-AircraftBreakout
Circus (MAME samples came from this machine)
Kung-Fu Master (soon to be Defender again, anyone want to buy the kit?)
Monaco GP cockpit
Paddle Battle PCB (1973 Pong clone)
LeMans PCB
Space Invaders
Steeplechase
Super Bug PCB
Tank
Tempest
Chicago Coin Motorcycle (electromechanical racing game)
Hi Brian, didn't you have your own website at one time(other than www.orubin.com), with quite a bit of content? Is it gone or am I missing it or am I mis-remembering?
Dave
Here's some old pics of my stuff.
http://members.tripod.com/d_widel/pics/index.htm
you can almost see an inch of the death race side art in the very back of shed 2. BTW I had to give $25 for that death race.
-
Awesome, list and I love Crossbow! I was looking for one of those for a bit, then kinda gave up.Daniel
Yes, I can't wait to start playing it. I'm planning on converting it to play 8 different exidy games. I have the roms already patched so that they'll all play on a combat board, I just have to actually build it. I've been putting it off because there's a ton of roms to install.
-
Currently working and in the house
Term 2
stun runner
turbo cockpit
zaxxon cab w/ jamma harness
ms pac
midway's sea rescue
High Speed pinball
Pacman
omega race mame cab
27" cocktail mame cab
eggs in a mr do cab.
waiting to get moved in:
Drakton
2 japanese sit down jamma cabs
formula k
crossbow
In the garage waiting for repair
Death Race
vanguard
pacman
breakout
cosmic guerilla cocktail
sea raiders
waiting for mame
race drivin
super tank
asteroids dlx cocktail
astrofighter cocktail
-
How is this loading the games? It's not a Mame-modified machine, is it? I mean it loads actual PCB's right?It's emulation. I wouldn't mind them so much if they'd just tell people it's not the real thing. It's a single board computer, possibly a bootleg playstation type board, running mame or something similar. It comes with a jamma adaptor, or possibly the adaptor is built in now on the newer models. They run around $300. The early models had really poor emulation, I hear they're a little better now. Regardless, I'd stay far away.
-
This multi is better than the 2bit, and it's cheaper as well.
-
I have a pacman with the 500+ multigame and hi score kit in it for $600, near KC.
-
I have a Space Duel upright, killer condition cosmetically minus a few scratches here and there. Nice monitor, PCB, works great and everything all nice. What I'm debating is.. I want to build a JAMMA cabinet so I can play JAMMA and Neo Geo games. I've heard you can actually make more money, selling the parts. If that's true.. should I use this cab to make my Jamma? Or sell it complete? Also.. any one interested in it? I'll be taking some pictures as soon as I have the coin doors painted and such.thanks for the help!
I'd sell it and buy a neo, be a lot less work than jammatizing. Space Duels are usually worth about what the monitor is worth, so it's up to you if you want to part it or not.
-
No...it was pointed out before that not all are available for d/l (like Alien Vs. Predator)Why...I dunno (?) Other CPS2 games are up, and it's certianly not the largest (not by a longshot).
The rights aren't owned by capcom. The owner requested it's removal.
-
I have an upright in Kansas City for $150.
Dave
-
Once you find out what amp it is you should be able to order one from Jameco, Mouser or even your local Radio Shack. There are some amps that were used on arcade games that are no longer made but there are instructions for modifying your board to use a newer style. It's just a matter of swapping pins to where they are supposed to be.
Dave
-
The heat sink will have 2 bolt holes, but the amp should have more holes if it's missing. They're often a single row of pins. Maybe 8 pins? Does it look like a chip has been broken off?
If it is mising you might be able to figure out what it is by following the traces. If you can follow the speaker wires to the edge of the board and then follow them across the board to the holes. You could figure out the output pins, you should be able to trace 12v and ground to the holes as well. Then you could look at the common amps and maybe figure out one that would work with the pinouts you need.
You might ask on Rec.games.video.arcade.collecting as well. Somebody there could probably tell you. I don't have that board myself.
Dave
-
It looks like the heatsink for a sound amp. I have no idea what the amp would would be. Are you missing the amp or just the heat sink that bolts to it?
Dave
-
Not a console, but pacman hardware.
Dave
www.widel.com
-
I acquired about 10 boards that I think go to at least 2 boardsets for this game in a recent warehouse cleaning at a local amusement company. Unfortunately I have yet to find someone that has a full manual that they will scan so I can see if I have a whole set. I'm missing the card cage also but I think I can get around that problem. I just don't want to risk frying my boards to test them without more information. If anyone has a lead on a manual scan or original, I'll gradly see if I have a complete boardset and see about getting it dumped. Possibly then it can be emulated in MAME.AlanD
It looks like you need 6 boards.
cpu
screen ram
super game memory
game i/o
640k eprom
pattern mover
plus the seperate audio amp but you can get that anywhere
It doesn't look to fun to dump, 40 eproms on just that 1 board! I wouldn't be suprised if someone stole some/all of them for another game.
Dave
-
quote:
Originally posted by Nukey Shay:The faster one should be included as an option, then...but it's not.New Puck One is not just a graphic hack, as Ken described the game..."When you get caught, the monsters appear to chew the frog."The maze layout is the same as New Puck X in Mame...but in that game, the characters are unchanged (same goes for getting caught).
The chewing thing is just a graphics hack and not as interesting as it sounds. After pacman is eaten by the ghosts the ghosts sit on top of him for a second. They changed it so the ghosts have teeth and the teeth are moving.
There are a lot of good pac bootlegs that aren't in mame. Check out this one http://www.klov.com/N/NewPuc2.html
A slot machine between levels and the ghosts are named "Smokey the Bandito","kermit is froggy","Charlie the tuna", "tony the tiger"
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
New (sorta) hack
in Atari 2600 Hacks
Posted
These are the difficulty settings for pac and pacplus. Column 4 of the main table is an index into the second table that iirc is frame counts. Pacplus difficulty table is similar and indexes the same table. There is an extra column for the blue time for the bonus.