Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: AE35 on May 21, 2017, 12:37:01 pm
-
Hi all
I just got a MS Pac-man bootleg PCB. It has some slight graphics problems on the main screen, and
upon maze attract mode the ghosts and the player are just colored blocks. I have tried reseating the
eight EPROMS on the board. Any advice would be great :)
https://www.youtube.com/watch?v=FZhdlkCI4iY&feature=youtu.be (https://www.youtube.com/watch?v=FZhdlkCI4iY&feature=youtu.be)
-
Bad 5E? Make sure all legs are clean and none are folded over.
-
look for the video rams
what u are seeing is called sprites
it comes from a bad seated ram/eprom
ed
-
Thanks! How do I know which eprom are equal to 5E? or the others, for that matter. I have attached a picture of my Falcon bootleg below.
The row closest to the edge connector are 2732's the row behind is 2716's. If I burn new eproms, what should I use - and where should they
go?
It seems that only the eproms are in socket. I can't even find the ram on the picture :banghead:
Thanks!
-
it is labled 9
look at the side of your board
it is printed 1-9
go to 5 this is your row
e=5th chip over
as from the bottom of the row counting up it is a 74ls style
come in the other way
wala a eprom marked 9
your rams are on row 0 and 1 or 1 and 2
ede
-
Thanks! I wasn't sure that the bootleg used the same placement of the eproms.
Eprom 9 is a 2716, which can hold 2kb. The 5E data (obtained from a mame-set of pac-man) is 4kb.
Which makes be doubt if this bootleg is using the exact same roms as an original board? I just want to
burn a new eprom and see if it works :)
Thanks for your time!