TravistyOJ
Another Striker
- Joined
- Oct 15, 2005
- Posts
- 326
What does it mean if all tests pass, and I still can't get past the crosshatch. I've checked multiple carts and multiple slots and I don't see any broken traces.
If possible, please make the NDR work with larger eproms.
Would like to stack the image and put it on a larger rom and toss that on the neo.
Last time I tried: No go. Black screen.
What does it mean if all tests pass, and I still can't get past the crosshatch. I've checked multiple carts and multiple slots and I don't see any broken traces.
Just wanted to say thanks for creating the diag ROMS - awesome piece of work and they helped me fix my MV-1FZ. I will send a donation when I get next paid. Very grateful, you are a smart helpful guy =)
Got another FZ, non responsive SM1. All connections are good and swapped the SM1 with same results. If I press start after the results I get crunchy sound and it says YM2610 IRQ error.
I've added a lot more documentation on the home page for the new error codes. I've been meaning to do this a lot earlier but never got around to it. Most of the specific errors have been explained with relevant chips and traces to test and investigate.
This sort of info can also used as a reference on why a board isn't working after you've tested the obvious address/data connections to RAMs etc.. A lot of the 'glue' logic that supplements all of that and how it actually affects a system doesn't seem to be well documented. I'll try to keep it updated as more info gets put on the dev wiki or when I have time to probe my own boards.
What causes the Diag bios to say it fails the CRC check when running a test?
A bad EPROM burn is the simplest cause. If it verifies OK or it's the only system it happens on, then it's possibly a lower address line to the BIOS but it's not as likely. It'll probably be A12 or A11 if any for the 68k side. If it's an upper address line (A13~A15), it should catch that as a separate error.
Hey Dan, is it possible to add some Z80 type loop tests for RAM, SM1, YM2610 and Z80? Is there any that can be made/added?
A future version could just add a few of those in the sub menu but I'd need to update the SM1 for the first time. Only the SP1 ROM has changed up until now. Have you had to replace a YM2610 that had audio/muting issues when running for a while after power on?
Why would you change the G0 and the C1? Since only the first bit is off, check the Neo-B1.
Hey guys, I get this consistently on an MV-1:
WRAM DATA (0000)
ADDRESS: 10100C
ACTUAL: 0080
EXPECTED: 0000
No variance if I cycle power. Does this mean I need to replace a RAM, and if so, which one? Thanks!
New board, new problem.
I have no sound, so threw in the diagnostic ROM and I get this error report.
Z80 Reported Error Code: 14
M1 Bank Error (16K)
NEO-D0 SDRD0 (45) → CHA SDRD0 (MVS: B47)
Z80 A15 (5) → CHA SDA15 (MVS: A58)