hi there all! i have a super cobra pcb made by stern which i have nearly finished the repair, there are 2 graphic roms at 5f and 5h which are faulty.from the websites these roms are not there?only the konami is there but i need the stern version,is there anyone who can help please.
super cobra
- Thread starter sukhbir
- Start date
Looking @ the romset (stern version) the gfx roms @5f & 5h are the same as the original version...
http://img20.imageshack.us/img20/3342/scobra.jpg
give it a try....
http://img20.imageshack.us/img20/3342/scobra.jpg
give it a try....
yes i mean konami version.
if you look at the mame driver you'll find that 5f and 5h eproms are always used.
but in "superheli" they are put in inverted order:
[/code]try to invert those chips and see what happens.
if you look at the mame driver you'll find that 5f and 5h eproms are always used.
but in "superheli" they are put in inverted order:
Code:
[code]ROM_REGION( 0x1000, "gfx1", 0 )
[IMG]http://www.progettoemma.net/img/spacer.gif[/IMG]ROM_LOAD( "epr1274.5h", 0x0000, 0x0800, CRC(64d113b4) SHA1(7b439bb74d5ecc792e0ca8964bcca8c6b7a51262) ) [i]/* labeled "7" and is at position 5F, not H */[/i]
[IMG]http://www.progettoemma.net/img/spacer.gif[/IMG]ROM_LOAD( "epr1273.5f", 0x0800, 0x0800, CRC(a96316d3) SHA1(9de0e94932e91dc34aea7c81880bde6a486d103b) ) [i]/* labeled "8" and is at position 5H, not F */[/i]thanks for your help but still no luck,i have done a romident check on all the other roms and they are good but bad on 5f and 5h?the game runs fine with sound all works well apart from certain sprites which have sections of pixels missing and no fuel tanks visible.
from memory fuel tanks missing is a protection thing - certainly used to happen on scramble, and I guess super cobra uses the same (or maybe a different) protection chip.
sections of pixels missing could be a dodgy connection to one of the eproms on an error in the parallel to serial circuit.
you would need to post some pics so we can see if it's a regular or random problem.
memory map would not affect graphics roms in any way, they are not actually mapped in to the processors view of the world (on most PCB's anyway, but definately not on scramble hardware)
sections of pixels missing could be a dodgy connection to one of the eproms on an error in the parallel to serial circuit.
you would need to post some pics so we can see if it's a regular or random problem.
memory map would not affect graphics roms in any way, they are not actually mapped in to the processors view of the world (on most PCB's anyway, but definately not on scramble hardware)