Recent content by ragefan

Hello, I tested the diag rom cps1 on a faulty A Board but could not find abnormal things. The logo street fighter 2 is displayed wrongly. I can also get same thing in game. Any clue Thanks

@ack, it is kind of magic... I unsoldered 1 ram, put a socket , changed the ram with another model and ... now I can see your memory viewer working on BG1 (BG2 failing). Changed again to the original BG1 ram ... Still working... Did the same with the BG2, now the whole test is working ... with...

Yes when it's changing from word to byte read at the screen.(Button 1). I see 1 pulse (only one) with my logic probe everytime I push the button.

I unsoldered one of the ram... And tested it off circuit. It is correct. So, the problem comes from the custom chip as the OE is directly connected to it. What is weird is that I do see a pulse when the test starts. Maybe the signal is not "clean" enough to enable the ram ? Or could it be only...

I will try to change one by this week end and see what happens, moving from UM62 to sony one.

No, it remains low all time

Sorry if was unclear. Button 1 changes from word to byte read. I see a pulse on WE everytime I push it but no change on screen. CE1 is low on both chip. CE2 is high on both chip.

Tried it :) 3 buttons on memory viewer : - 1 does nothing - 1 switches between word/byte. I see WE pulse when pressing with my probe. -1 is back to previous screen. I see WE pulse when pressing with my probe. Scope shows a signal. Is that expected ? I cannot read anything new in the ram...

Indeed only video dac test actually triggers watchdog. BG1 Ram in memory viewer is total garbage. (Not 0 at all !). Same for BG2. What to conclude ?

Now it is working ! I occasionally had some resets but I could run all tests without issue. They all passed except bg. Well, it seems i have this bg issue to fix. I do see a pulse on the WE pin of the bg ram when the test is started but I get the error. Do you think I can use the ram model I...

This thread seems to state there is a watchdog (comment from porchy) : https://jammarcade.net/wwf-wrestlefest-repair-log/ His code here seems to implement some sort of it : https://www.jammarcade.net/files/ROMs/Diagnostic/wwf_test.zip

Yes, I can do that and will tell you. (The board does not reset with original roms) I remember having done it already and the romident found a valid romset. What do you think about the bg ram test ? Is it valid ?

Just tried. Well... The menu appears but the board resets also after a very short while. I just tried to launch bg ram test before it resets and I could briefly see an read error both 0x8000. I piggybacked the rams with another model but could not define they are faulty. I checked the pin with...

Hi, I've got a relatively clean Konami board for "run and gun" that does not boot. Unfortunately, I'am finding little info on this one. Program rom and sound rom has been tested ok. I looked at the reset signal which seems to to through a pair of ls04 and Konami 53252. I cannot find yet where...

Thanks ! Now working but it says : Testing Mad crc 32 then testing work ram then testing palette ram. The palette ram starts with puzzles on the screen and then the board resets. Then back to this crc/work/palette loop. I cannot enter any menu. Is it normal ?