All three top bidders had high feedback, so I suspect they're legit.And perhaps two of those were seller alt accounts. so all it takes is one sucker.
All three top bidders had high feedback, so I suspect they're legit.And perhaps two of those were seller alt accounts. so all it takes is one sucker.
27c800 are “-100F1” ones , the 4002 one is -12f1verifying the audio EPROMs would be my first step check the speed too.
try a 100ns chip replacementthe 4002 one is -12f1
I put a -10f1 and didnt change something ... remain that 800 to rewrite again maybe from there is the problem . I suspect 13h who keeps the okisfx file must be replaced . I powered the board without 12f inserted (oki music file) and is no sound at all with perfect image and movements . Without 13h inserted not perfect image but sounds like before without that samples when you hit enemiestry a 100ns chip replacementthe 4002 one is -12f1
I cut only on pin 5 . To be sure i didnt cut other connection i put multimeter to be sure its not nothing lost near and all good siryour wire mod looks correct but are you sure you fully cut the trace? have you checked for accidental bridged pins?
I don't know what this meansOn the solder side the cut was much light to cut in comparation with what i did on the componeny side
I mean when i cut the trace at pin 5 from was little bit harder than traces from pins 32 from the 13A & 14A socketsI don't know what this meansOn the solder side the cut was much light to cut in comparation with what i did on the componeny side
It’s been a while but I think you need to write the eeprom (93c46). If you use the file in mame you need to byteswap it first @playero
It’s been a while but I think you need to write the eeprom (93c46). If you use the file in mame you need to byteswap it first @playero
And here we go much further : https://shmups.system11.org/viewtopic.php?f=20&t=10566&start=210Thanks!!!
And here we go much further : https://shmups.system11.org/viewtopic.php?f=20&t=10566&start=210
Cut the traces (on the back of pcb - solder side) to Pin 32 on the EEPROM sockets at 13A and 14A, wire these together then Wire them to Pin 9 of the 74LS373 at11AI think I have something to do to join there.
Pictures as I attached, problems left.
Actually I don't know that I cut the trace right. I cut printed pattern of pcb near 13A, 14A 32 pin.
And wire 11A 9PIN to 13A 14A 32PIN,
11A 8PIN to 13A 30PIN.
Please let me know
Where to cut! And I did right or not.
Thanks!
Cut the traces (on the back of pcb - solder side) to Pin 32 on the EEPROM sockets at 13A and 14A, wire these together then Wire them to Pin 9 of the 74LS373 at11A
Run another wire from Pin 8 of the 72LS373 at 11A to Pin 30 of the EEPROM at 13A
You are very close sir
ps : solder of you wires seems to be good