[Tech] Super Pac high score save

[guddler]

[ukvac] [Tech] Super Pac high score save
Am after a little help with one of Jroks high score saves, namely Super
Pac.

I have a Namco Super Pac board as opposed to the Bally / Midway one. The
new high score save enabled rom works a treat in the game but I then get
the Bally / Midway copyright rather than the proper Namco one.

So, since the man himself doesn't seem at all interested in replying to
emails on the subject, whould anyone else be able to help with changing
the copyright message in the new rom for me please? OR can anyone work
out what code has been added or changed and apply that to the Namco rom
instead?

Ta for any help on this one...

Guddler.

________________________

Guddler's Arcade
http://www.guddler.co.uk

 

[LukeWells]

Re: [ukvac] [Tech] Super Pac high score save
I would _assume_ that you could probably just load the rom image up into a
hex editor, do an ascii search for "Bally Midway" and then edit it to say
Namco, placing spaces over the excess characters. Some boards have the text
muddled up at different rom locations though to stop H3xx0r kiddies copying
them with and changing the copyright name.

Luke

 

[pobtastic]

RE: [ukvac] [Tech] Super Pac high score save
Bugger... Yeah I was gonna do that wasn't I??? Sorry... Needed a bit of
prodding...

It looks easy enough, I'll have a go at it on Sunday.

Pobster

 

[guddler]

RE: [ukvac] [Tech] Super Pac high score save
Apologies there, I've had people eamiling me about this and I got caught
up with a work problem )

Anyway, I think that we already looked at a straight text replacment
jobbie, but the issue is that the Bally/Midway copyright consists of
text, but the Namco copyright contains the Namco graphic...

I'll look again tonight, and obviously if it IS a straight text swap
then I will be able to do it myself, failing that, Paul, Gav, Luke - I
will come back to you )

Cheers,
Gud.

________________________

Guddler's Arcade
http://www.guddler.co.uk

>

 

[pobtastic]

RE: [ukvac] [Tech] Super Pac high score save
Problem with it is that one of them has one more byte than the other. Can't
remember which ROM it is offhand that has the modified code in it, but the
VERY first instruction is a CALL command to code right at the end of the
program code (the bit written by jrok which is quite easy to follow) but
some of his address locations *may* need to be changed here if they are
pointing at addresses contained within this memory block (cos obviously when
you change the code over there will be that one byte difference in memory
locations). THIS is why I troubled over it somewhat... I wanted to make
sure it would work! Probably should have just changed it and tried it
anyway to see what happens, suppose the worst that will happen is that it'll
crash and not work...

Pobster

 

[LukeWells]

Re: [ukvac] [Tech] Super Pac high score save
for this example we will say the text is "Bally Midway" and you want it to
say "Namco"

Bally Midway is 12 chars
Namco is 5 chars

Change the text to " Namco " so you have 3 spaces at the beginning and
4 at the end, therefore the program size doesn't change

Luke

 

[pobtastic]

RE: [ukvac] [Tech] Super Pac high score save
No, no, no! You're not reading what's been written...

...One IS text, but the other is a graphic - And the code is ALREADY one
byte different, a quarter or so is the same and then the rest is advanced
one byte.

If it was simple I wouldn't have just lost interest in it!!! )

Pobster

 

[pobtastic]

RE: [ukvac] [Tech] Super Pac high score save
Oho... *ahem* advanced forward one memory location, not byte obviously!

Pobster