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Gradius II dump?
https://forums.nesdev.com/viewtopic.php?f=9&t=15247
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Author:  Zepper [ Wed Dec 14, 2016 12:53 pm ]
Post subject:  Gradius II dump?

Board pictures. A pirate cart with cheating.

Attachments:
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IMG_20161214_174807078.jpg [ 333.91 KiB | Viewed 2007 times ]

Author:  lidnariq [ Wed Dec 14, 2016 12:54 pm ]
Post subject:  Re: Gradius II dump?

It's a VRC2 with a pirate IRQ.

... Wait, that looks really familiar.

'cuz it is...

Author:  Zepper [ Wed Dec 14, 2016 3:45 pm ]
Post subject:  Re: Gradius II dump?

Fine. How could I dump it with kazzo? Is possible to do it?

Author:  lidnariq [ Wed Dec 14, 2016 3:49 pm ]
Post subject:  Re: Gradius II dump?

Dump it as though it were the ordinary licensed VRC4 Gradius 2. CHR is identical and PRG will only differ in the last 2 KiB.

Sorry, I should have actually looked at my traces from when Fisher asked; it's actually VRC2b layout.

However, it won't work in any emulator. There's no mapper allocated to this board.

Author:  zxbdragon [ Wed Dec 14, 2016 7:16 pm ]
Post subject:  Re: Gradius II dump?

lidnariq wrote:
Dump it as though it were the ordinary licensed VRC4 Gradius 2. CHR is identical and PRG will only differ in the last 2 KiB.

Sorry, I should have actually looked at my traces from when Fisher asked; it's actually VRC2b layout.

However, it won't work in any emulator. There's no mapper allocated to this board.


dumper and read eeprom,The data is different.
dumper:data is 2k patch to PRG, ROM size :128+128
eeprom:ROM size :2k patch+128+128

all G2 pirate working my build nestopia plus! r314

Author:  Fisher [ Sun Dec 25, 2016 6:06 am ]
Post subject:  Re: Gradius II dump?

First of all, MERRY CHRISTMAS!!!

I have a pirate "Kid Dracula" (Akumajou Special: Boku Dracula-kun) that runs on similar hardware.
Is ROM dumping / PAL dumping / scanning worth the effort?
I mean, can this really help documenting and further understanding the hardware?

Does your cartridge have the same bug as mine?

Author:  zxbdragon [ Sun Dec 25, 2016 8:21 am ]
Post subject:  Re: Gradius II dump?

Fisher wrote:
First of all, MERRY CHRISTMAS!!!

I have a pirate "Kid Dracula" (Akumajou Special: Boku Dracula-kun) that runs on similar hardware.
Is ROM dumping / PAL dumping / scanning worth the effort?
I mean, can this really help documenting and further understanding the hardware?

Does your cartridge have the same bug as mine?


Akumajou Special: Boku Dracula-kun..... I DUMPED,but IRQ not emu

you can dumped 16L8AN?

Author:  Fisher [ Sun Dec 25, 2016 9:18 am ]
Post subject:  Re: Gradius II dump?

With Lidnariq's help, I have read the PAL chip as an EPROM.
Later he figured out the logic on the IC based on the data.
I see no reason this could not be made again with this other PAL.

Should I? I think I will!!

Author:  lidnariq [ Sun Dec 25, 2016 11:15 am ]
Post subject:  Re: Gradius II dump?

If you want to build a generic harness for dumping PAL16L8, connect pins 13-18 to your ROM reader data lines, but also put ≈4.7kΩ resistors from your ROM reader address lines to those six pins.
This will let the address line drive the pin if the PAL is configured to have the pin be an input, but will let the data line be read if it's an output.

Author:  Fisher [ Sun Dec 25, 2016 3:19 pm ]
Post subject:  Re: Gradius II dump?

Do you mean like this?

Author:  zxbdragon [ Sun Dec 25, 2016 3:52 pm ]
Post subject:  Re: Gradius II dump?

Akumajou Special: Boku Dracula-kun

Attachments:
QQ图片20161220215809.jpg
QQ图片20161220215809.jpg [ 2.1 MiB | Viewed 1782 times ]

Author:  Zepper [ Sun Dec 25, 2016 3:54 pm ]
Post subject:  Re: Gradius II dump?

Back to the subject... :| :|

So, it's NOT possible to dump it with Kazzo because of this extra chip/data?

Author:  zxbdragon [ Sun Dec 25, 2016 4:02 pm ]
Post subject:  Re: Gradius II dump?

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Author:  zxbdragon [ Sun Dec 25, 2016 4:03 pm ]
Post subject:  Re: Gradius II dump?

lidnariq wrote:
If you want to build a generic harness for dumping PAL16L8, connect pins 13-18 to your ROM reader data lines, but also put ≈4.7kΩ resistors from your ROM reader address lines to those six pins.
This will let the address line drive the pin if the PAL is configured to have the pin be an input, but will let the data line be read if it's an output.

this cart 16l8an+ax580c ,VRC4 +IRQ?

Author:  Joe [ Sun Dec 25, 2016 4:30 pm ]
Post subject:  Re: Gradius II dump?

Zepper wrote:
So, it's NOT possible to dump it with Kazzo because of this extra chip/data?

It is possible. Use VRC2b.

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