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WPC ROM Changing, High Score Retention
- Thread starter DRD
- Start date
I don't think this is possible as the checksum on the ROM will be different which causes a reset. The best you can do really is write down the scores before changing it, at least you'll know if you've beaten them yourself then.
He's asking about WPC roms Paul, not Stern SAM ones 
FYI I just applied the non-ghosting patch to The Shadow ROM version LX-5 and it retained all high scores and audits (to much relief!) even though the checksum was different. YMMV
The ROM is of course READ ONLY MEMORY, the RAM on the board
RAM where high scores etc are stored are in U4. not the eprom.
In all the years I have changed eproms over in games I have never had the high scores saved or the settings.
Think @woz was incredibly lucky - or it could of been the fact the ROM name was the same.....
Some ROM patches for ghosting etc do not change the checksum, this is needed in WPC95 games or the later WPC security CPU boards.
RAM where high scores etc are stored are in U4. not the eprom.
In all the years I have changed eproms over in games I have never had the high scores saved or the settings.
Think @woz was incredibly lucky - or it could of been the fact the ROM name was the same.....
Some ROM patches for ghosting etc do not change the checksum, this is needed in WPC95 games or the later WPC security CPU boards.
ROM name was changed to MX-5
I wasn't expecting the high scores/audits to be saved either (I made a note of the important ones before the swap - didn't want to lose my 15 year high score!). I wonder if there is something in the patch that tricks the game into thinking its the same ROM even though the checksums were different.
LX-5 Checksum: x02D1A205
MX-5 Checksum: x02D1A505
BTW the patched worked successfully. There wasn't much ghosting before (really had to look for it) but now it's been eliminated completely.
I wasn't expecting the high scores/audits to be saved either (I made a note of the important ones before the swap - didn't want to lose my 15 year high score!). I wonder if there is something in the patch that tricks the game into thinking its the same ROM even though the checksums were different.
LX-5 Checksum: x02D1A205
MX-5 Checksum: x02D1A505
BTW the patched worked successfully. There wasn't much ghosting before (really had to look for it) but now it's been eliminated completely.
When I converted all my games to NVRAM I had the same idea how nice it would be to keep my highscores on all my games (I´m a bad player and it would take me forever to reach them again)
So I came up with a procedure how to recreate/write your highscores (or even some fake ones to impress your mates if desired) into the the NVRam chip.
Described the procedure here: https://pinside.com/pinball/forum/topic/restoring-writing-own-highscores-to-nvram#post-6623549
prerequisite: One needs a (Eprom)programmer and the CPU converted to NVRAM
So I came up with a procedure how to recreate/write your highscores (or even some fake ones to impress your mates if desired
) into the the NVRam chip.Described the procedure here: https://pinside.com/pinball/forum/topic/restoring-writing-own-highscores-to-nvram#post-6623549
prerequisite: One needs a (Eprom)programmer and the CPU converted to NVRAM
@woz = your checksums are the same on here.
Dont think it matters what the eprom name is - whenever I alter any roms you have to get the checksum the same as what it was before. The only games I have done this with was Theatre of Magic and another WPC security cpu era. You can have fun with the WINNERS DONT USE DRUGS frames......
If you are really worried about the high scores - note them down.
Then play a game with the 'glass off' and get a score close to your previous games.
Very curious to see if you do keep your scores etc.
Dont think it matters what the eprom name is - whenever I alter any roms you have to get the checksum the same as what it was before. The only games I have done this with was Theatre of Magic and another WPC security cpu era. You can have fun with the WINNERS DONT USE DRUGS frames......
If you are really worried about the high scores - note them down.
Then play a game with the 'glass off' and get a score close to your previous games.
Very curious to see if you do keep your scores etc.
