Ketsui ROM fix

SuperPang · Post by **SuperPang** » Mon Jan 21, 2008 12:46 pm

So, is it just a case of swapping a socketed bios, no soldering?

The freeplay bug never really bothered me but I got my PCB out for the first time in months and it doesn't save the test menu settings and now I get it freezing in attract mode with a list of yellow errors when its not in freeplay ?!?! Might I have touched teh switch of dooom?

thegreathopper · Post by **thegreathopper** » Mon Jan 21, 2008 12:52 pm

I have the fixed bios mod which is just a case of unplugging a IC and plugging the fixed IC in, no soldering needed.

Before I swapped the bios the only problem I had was the freeplay bug so maybe you have other problems, try turning freeplay off and you should have no bugs.

SuperPang · Post by **SuperPang** » Mon Jan 21, 2008 12:57 pm

That's just it, suddenly I do. I'm wondering if I knocked the switch putting it in the AT.

sven666 · Post by **sven666** » Mon Jan 21, 2008 1:35 pm

SuperPang wrote:That's just it, suddenly I do. I'm wondering if I knocked the switch putting it in the AT.

proboably, it shouldnt freeze in the attract mode anyways regardless of which revision you have.

what happens when you toggle the switch?

SuperPang · Post by **SuperPang** » Mon Jan 21, 2008 1:40 pm

I'll try it. I think its about time I upgraded teh rom too.

SuperPang · Post by **SuperPang** » Mon Jan 21, 2008 1:45 pm

Yeah, I must've hit the switch

First of all SW1 is a toggle switch. You can flip it but it will return to it's original position.

. Power up the game.
. Flip SW1. The brown switch to the right of the JAMMA connector.
. This will reset the game.
. Let the "Demonstration" start.
. The game will crash when it's writing "Demonstration" on screen.

Here is a video showing the crash: http://home.online.no/~an-tj/rtw/ketsui/ketsui.avi

This behaviour will persist even if you power cycle the PCB.

However if you start a game before it gets to run the "Demonstration" and let it end normally the issue will not occur unless you flip switch SW1 again!

To fix this behaviour do the following:
. Power up the PCB.
. Start a game before the "Demonstration" gets to run.
. Let the game end normally.
. Hit the test switch to activate Setup.
. Select "Restore Defaults".

thats exactly it

djvinc · Post by **djvinc** » Mon Jan 21, 2008 2:51 pm

You can reprogram the original 27C160 EPROM if you have access to a UV eraser and a programmer.
I'm doing it tonight.

Post by **Dave_K.** » Mon Jan 21, 2008 4:37 pm

Use real coins, and avoid the fix rom (with annoying new lockon laser sound) all together.

thegreathopper · Post by **thegreathopper** » Mon Jan 21, 2008 6:03 pm

Dave_K. wrote: (with annoying new lockon laser sound)

I know there was something different about Ketsui after swapping the bios, I could not work out what it was..

why do you think they did this?

Strider77 · Post by **Strider77** » Mon Jan 21, 2008 7:33 pm

to make fanboys argue over it and loose sleep...

thegreathopper · Post by **thegreathopper** » Mon Jan 21, 2008 8:24 pm

Strider77 wrote:to make fanboys argue over it and loose sleep...

Do you think?

I found the game to seem very different but could not pinpoint what had changed. It was the sound very different.

Post by **Dave_K.** » Mon Jan 21, 2008 8:26 pm

More like because in Japanese arcades its hard enough to hear anything. It must have become a particular concern for pro players.

Strider77 · Post by **Strider77** » Tue Jan 22, 2008 8:29 am

it was a joke.... kinda like the blue shadows/nick rox thing.

thegreathopper · Post by **thegreathopper** » Tue Jan 22, 2008 9:08 am

Strider77 wrote:it was a joke.... kinda like the blue shadows/nick rox thing.

I know it was a joke.

djvinc · Post by **djvinc** » Tue Jan 22, 2008 9:21 am

Damn. I may have to flash it back then

rtw · Post by **rtw** » Tue Jan 22, 2008 11:25 am

sven666 wrote:proboably, it shouldnt freeze in the attract mode anyways regardless of which revision you have.

what happens when you toggle the switch?

Actually it will freeze when the battery is dead

When you do a "default" in the setup menu the correct values
are written to NVRAM and the board will work OK as long
as the battery powers the NVRAM. When the battery is dead
the correct values are lost, causing the craash.

Look here for the reson why you should never touch the switch...

http://shmups.system11.org/viewtopic.ph ... &start=160

rtw

SuperPang · Post by **SuperPang** » Tue Jan 22, 2008 2:10 pm

I think I might leave the rom then.

So if my battery is dead does that effect the procedure I posted above?

rtw · Post by **rtw** » Tue Jan 22, 2008 4:57 pm

SuperPang wrote:I think I might leave the rom then.

So if my battery is dead does that effect the procedure I posted above?

Power on the PCB, enter setup, choose default and you'll
have no trouble at all.

Mind you, you have to do this every time you power up.

rtw

SuperPang · Post by **SuperPang** » Tue Jan 22, 2008 5:00 pm

No way.

Can I get the battery changed?

rtw · Post by **rtw** » Tue Jan 22, 2008 5:16 pm

SuperPang wrote:No way. Can I get the battery changed?

Of course it can be changed, however it might not be dead yet though.
Leave the PCB plugged in for a few hours and measure the voltage
across the battery.

If you want to change it just replace it with a compatible one as
outlined in the thread I linked to a few posts above.

rtw

SuperPang · Post by **SuperPang** » Tue Jan 22, 2008 5:22 pm

I shall leave it running tomorrow

SuperPang · Post by **SuperPang** » Tue Jan 22, 2008 5:31 pm

Out of interest, if I slap a revised rom on there while the switch/freeze bug is there and possibly with a dead battery, would there be any problem?

rtw · Post by **rtw** » Tue Jan 22, 2008 5:45 pm

SuperPang wrote:Out of interest, if I slap a revised rom on there while the switch/freeze bug is there and possibly with a dead battery, would there be any problem?

I don't believe you will have any issues. But I'm not 100% sure.

rtw

SuperPang · Post by **SuperPang** » Tue Jan 22, 2008 5:51 pm

If I decide to swap it I'll make sure to have it working first, I don't want to force a new error on a PCB thats worth 3x what I paid for it already

shmups.system11.org

Ketsui ROM fix

Ketsui ROM fix

Ketsui.

Ketsui.