[Black Swirl of the Dead] Problem after change regionfree bios

[dragoncity]

Hello !

The first time I use region changer..no problem..but second time...Black Swirl of the Dead...


So For repare that..I put this bios "jc-bootROM-devkit-v1.031.bin".

So it's ok...but not PERFECT !

The 1rst problem,many games can't stay in 60hz,so I have just "Half the screen" like Resident Evil Code Veronica.

The 2nd problem,many games don't boot..Shenmue 1&2 for exemple.

The 3rd problem,I need to put 01/01/1950..

So there is an other solution to have a Dreamcast who works perfectly with an other bios..or anything else?

Thank you !

[SWAT]

Seems your flashrom chip is dead...

[dragoncity]

Yes I know...no possibility to fix?

If I put bios dreamshell,in RGB, I must preset Y for have 60hz at the beginning...possibility to FORCE 60hz and no press Y?

[megavolt85]

(24.11.2016 12:53)dragoncity писал(а):  Yes I know...no possibility to fix?

no, only replace Flash Rom (IC502)

[dragoncity]

Ok thank you.

Sorry for the double post,I delete the other.

So for that have you a solution:

If I put bios dreamshell,in RGB, I must press Y for have 60hz at the beginning...possibility to FORCE 60hz and no press Y?



If I don't press Y for 60Hz,I have half screen like this :

[megavolt85]

test
Settings->Display Settings->480i NTSC->back to main page->save to VMU

[dragoncity]

Ok I tested
480i NTSC + Reboot : Same problem
480i NTSC + Save VMU + Reboot : Same problem
480iPAL + Reboot : Same problem
480i PAL + Save VMU + Reboot : Same problem

The only solution is to Press Y after boot... (like my last pictures)

I tested Shenmue 2 on this Dreamcast...doesn't work ! Black screen

So... Dreamcast (Black Swirl of the Dead) + Dreamshell...many games doesn't work..

It's the same result for Dreamcast (Black Swirl of the Dead) + Freebios...many games doesn't work..

[megavolt85]

many games use Flash Rom (IC502)
this games can't work with damaged Flash Rom

[dragoncity]

Yes only solution..change IC502..my next step !

So Region changer IS VERY DANGEROUS...NOT SURE..and it can make unusable your Dreamcast!!

[megavolt85]

bad idea solder +12V to RESET IC502
need unsolder D503, rotate and solder
+12V need solder to D503

[dragoncity]

And after no problem?? I can change every day? :-)

Unsolder d501... so S5?

But you said , rotate...but if you rotate it's impossible to solder after...

Have you photo?

[megavolt85]

  regchange.png (Размер: 295.51 Кб / Загрузок: 173)

[dragoncity]

Ok if I understand..I desolder S6.

After I solder just 1 pin and the 2 others no solder on the motherboard

After I solder 12V at the left pin of S6.

Correct?

[megavolt85]

to motherboard need solder one pin
to red point on S6 need solder +12V
WARNING!!!! Don't solder two pins S6 to motherboard

[dragoncity]

Yes I said the same thing...1 pin motherboard..1 pin 12v.

And after no problem,no black swirl of death? Never?

[megavolt85]

yes

[SWAT]

(24.11.2016 17:53)dragoncity писал(а):  Never?

Any flash chips have write cycles limits

[dragoncity]

(25.11.2016 07:58)SWAT писал(а):  

(24.11.2016 17:53)dragoncity писал(а):  Never?

Any flash chips have write cycles limits

Sure,but If you said me you can more 20 times..it's ok !

Because my last experience..not with this schema,it's 2 times...

[SWAT]

(24.11.2016 16:08)dragoncity писал(а):  Ok I tested
480i NTSC + Reboot : Same problem
480i NTSC + Save VMU + Reboot : Same problem
480iPAL + Reboot : Same problem
480i PAL + Save VMU + Reboot : Same problem

The only solution is to Press Y after boot... (like my last pictures)

I tested Shenmue 2 on this Dreamcast...doesn't work ! Black screen

So... Dreamcast (Black Swirl of the Dead) + Dreamshell...many games doesn't work..

It's the same result for Dreamcast (Black Swirl of the Dead) + Freebios...many games doesn't work..

Settings saved to VMU A1, need attached VMU on this port.
Without save to VMU settings doesn't apply at startup.

Also you can use VGA cable, it's forced this mode without check region code in flashrom.

[dragoncity]

Also you can use VGA cable, it's forced this mode without check region code in flashrom.
Yes I know
But I would like always find all the solution ^^

But not good solution,the best is to replace this flashrom ,next step !