« previous next »
Pages: [1]

Author Topic: Gaplus graphic error  (Read 3917 times)

Belike

  • ArcadeLifeStyler'
  • ***
  • Posts: 4781
  • Budapest, Hungary
    • View Profile
Gaplus graphic error
« on: January 07, 2016, 09:34:08 AM »
Found an interesting Gaplus pcb, it has the original japanese Namco customs, but there is also a Sidam sign on solder side.Made a jamma adapter, the game works, but the spaceship, the rockets and the alien bombs are stripped.It has two 2148 rams, that might be the problem, but I'm not sure.
Any ideas?






Logged

ajhippel

  • Member
  • **
  • Posts: 147
    • View Profile
Re: Gaplus graphic error
« Reply #1 on: January 07, 2016, 11:17:04 AM »
just a guess without knowing the schematics:

a contact problem with the graphic-roms? try to check the sockets and clean the legs of the graphic-Eproms

Logged
there is too much butter on those trays

Belike

  • ArcadeLifeStyler'
  • ***
  • Posts: 4781
  • Budapest, Hungary
    • View Profile
Re: Gaplus graphic error
« Reply #2 on: January 07, 2016, 12:59:56 PM »
Thanks, will check those. ;)
Logged

neocps1

  • Jr. Member
  • *
  • Posts: 93
    • View Profile
Re: Gaplus graphic error
« Reply #3 on: January 08, 2016, 01:22:10 PM »
most likely a sprite buffer ram problem
Logged

Belike

  • ArcadeLifeStyler'
  • ***
  • Posts: 4781
  • Budapest, Hungary
    • View Profile
Re: Gaplus graphic error
« Reply #4 on: January 08, 2016, 01:49:15 PM »
Quote from: neocps1 on January 08, 2016, 01:22:10 PM
most likely a sprite buffer ram problem
Thanks for the input. :)
The 2148 is a spirte buffer ram?
Logged
Pages: [1]
« previous next »