coinopper Well-known member Donor 2012 Joined Oct 26, 2008 Messages 3,659 Reaction score 1,156 Location Kingston, Pennsylvania Jan 17, 2010 #1 I have 2 Ms. Pac boards here, one original and one with the Two-Bit Score daughter board. Both have the speed-up chip on them. I'd like to change them back to normal speed. Can someone tell me which chips I have to change?
I have 2 Ms. Pac boards here, one original and one with the Two-Bit Score daughter board. Both have the speed-up chip on them. I'd like to change them back to normal speed. Can someone tell me which chips I have to change?
Michael Roma Active member VAPS Joined May 17, 2008 Messages 1,404 Reaction score 18 Location Woodbridge, Virginia Jan 17, 2010 #2 That would be chip 6F. - Mike
Riptor Well-known member VAPS Joined Jul 10, 2007 Messages 12,078 Reaction score 144 Location Leonartown, Maryland Jan 17, 2010 #3 You cant slow down the ABC board without someone hacking the code. The program is all on one rom that resides on the daughterboard.
You cant slow down the ABC board without someone hacking the code. The program is all on one rom that resides on the daughterboard.
OP OP coinopper Well-known member Donor 2012 Joined Oct 26, 2008 Messages 3,659 Reaction score 1,156 Location Kingston, Pennsylvania Feb 26, 2012 #4 .. or emailing Two-Bit Score and having them send you the correct ROM version to program a new 27C512 EPROM with, which is what I ended up doing
.. or emailing Two-Bit Score and having them send you the correct ROM version to program a new 27C512 EPROM with, which is what I ended up doing