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Any PGM Conversion info out there?

It's a 14 years old Supergun with a standard scart cable. I don't know the model but in one side appears 2004 Christoph Zengel

One of the TV is a Sony Wega with 100hz and the other is an old Daewoo.


I have an original Sunset Riders PCB with the same problem in both TV's.

Asure said:
Trembling image usually means your tv/monitor can't handle the resolution/signal.. :(
Click to expand...
Yes, I was think in something like this.
 
I'd suggest that there's resistors in your cable attenuating the signal below what your TV can use

Paging @Frank_fjs to see if he can confirm

You may need a signal amplifier or a different cable
 
Not sure without having more details.

That name rings a bell, isn't Christoph the Vogatek supergun maker?
 
Can someone explain what exactly the function of DIP switch 8 does? On my DDPDOJ cart the game crashes after the warning screen with an address error when I flip DIP 8. Ketsui and Espgaluda seem to save settings but DDPDOJ does not. I wish DDPDOJ would be able to save the free play setting in the test menu.

Also I dislike the PGM BIOS screen on the DDPDOJ cart. I wish it would go straight into the game like Ketsui and Espgaluda.

I hope that the Black/white label program ROM becomes available soon.
 
andynumbers said:
Can someone explain what exactly the function of DIP switch 8 does? On my DDPDOJ cart the game crashes after the warning screen with an address error when I flip DIP 8. Ketsui and Espgaluda seem to save settings but DDPDOJ does not. I wish DDPDOJ would be able to save the free play setting in the test menu.

Also I dislike the PGM BIOS screen on the DDPDOJ cart. I wish it would go straight into the game like Ketsui and Espgaluda.

I hope that the Black/white label program ROM becomes available soon.
Click to expand...
On my carts, DIP 8 is used to save high scores.
 
xodaraP said:
I'd suggest that there's resistors in your cable attenuating the signal below what your TV can use

Paging @Frank_fjs to see if he can confirm

You may need a signal amplifier or a different cable
Click to expand...
I tried 3 different scart cables and the problem is the same.
 
This is probably the last version of the schematic for this year. I traced a handful of ASIC connections and missing connections on the program board, and I traced the OE pins of the sound and tile ROMs on the motherboard to the connector. I think the OE pin from the BIOS must go to the connector as well so that the cartridge can disable that, but so far I haven't seen where it goes.
The first page contains the circuit to connect a 16 bit ROM to the 8 bit sound chip connection.
 

Attachments

  • schematic.pdf
    639.3 KB · Views: 226
Asure said:
Pros: New type of sound pot instead of the old dial, 2032 battery holder, board works in tests. No real cart to check with yet. No leaky battery.



Cons: A little notch was broken of to make room for the sound pot on the side.
Click to expand...
I forgot where I bought mine from, but it's exactly the same as yours, notch and all.

:D
 
nam9 said:
Black IcE said:
Figured this is a good thread to ask in... Is it possible to get stereo out of a PGM 1 motherboard ? From what I have seen, I would guess not but I wanted to ask.
Click to expand...
Short answer, yes...
IMG_3545.JPG

(Just google UPD6379 Datasheet).

Burning question... do any games support Stereo?
Click to expand...
Sorry to dig out an old post... Is that the NeoGeo stereo mod board with the centre channel not connected?
 
DDP DOJ from Sheep came in today. The Eprom for U1 / Prog matches with the MAME version that's out there.
DDPDOJBLKBL.zip
My cart shows the original PGM bios screen. I'm not good enough to get a high score to see if it saves.
It mismatches with Yosai's version (Which is said to bypass the PGM bios screens and 100% sure save with dip #1)

Turns out i have no spare 27C322 but i'm recycling the one that was on the cart in the UV eraser as we speak.

Guess i'll need to figure out the xor process to make a black/white selectable version :)
 
I haven't dumped the AMB cart I've got. The file hosted on my site was made by Apocalypse.
 
Asure said:
DDP DOJ from Sheep came in today. The Eprom for U1 / Prog matches with the MAME version that's out there.
DDPDOJBLKBL.zip
My cart shows the original PGM bios screen. I'm not good enough to get a high score to see if it saves.
It mismatches with Yosai's version (Which is said to bypass the PGM bios screens and 100% sure save with dip #1)

Turns out i have no spare 27C322 but i'm recycling the one that was on the cart in the UV eraser as we speak.

Guess i'll need to figure out the xor process to make a black/white selectable version :)
Click to expand...
iirc since the encryption is xor based, decryption is the exact same logic. So you can just throw decrypted code in a rom, run it in Mame with debugger enabled, open memory window to get your freshly encrypted code, then put that in your rom. If you need a large chunk mame can dump it for you directly too

Obviously the game won't run correctly or at all when doing this, but it is easy to get the code out of Mame.
 
@kuze For some reason this is not working correctly for me.

I take the 'conversion plus' black label rom. This has white/black selectable on boot.
It doesn't care about the magic nvram content, and looks like ideal candidate.

I replace the program rom with it in ddpdojblk (original romset) and i can run it.
I can mutilate the nvram and boot it up and it will allow me to select each time. Rom error appears patched as well.

Ok, so i dump the code (save bank1,0x100000,0x3fffff,0) and inspect it.
It's decrypted code, but it's not swapped, so i use UCON64 to swap it to the proper byte order :)

I replace the kovsh main program rom with this new swapped result (copy /b to make it .322 sized)
I boot up kovsh. It loads the input i give it from my rom folder (unzipped for easy access)
I expect it to xor the data. But, i see repeating data at 0x100000 so this goes wrong for some reason?

Anyway i dump that to disk, swap it back and try to run it as ddpdojblkbl (bootleg kov sh) and it fails.
Something is up with kovsh xor/init'ing this data :(
 
Have you grounded the high/low address pin on the 27C322 since in this case you're using it as a 27C160?
 
Does it work if you don't double the ROM size? Since it requires additional hardware modification you would have to modify the MAME driver to tell it that's what you've done
 
Fluffy said:
nam9 said:
Black IcE said:
Figured this is a good thread to ask in... Is it possible to get stereo out of a PGM 1 motherboard ? From what I have seen, I would guess not but I wanted to ask.
Click to expand...
Short answer, yes...IMG_3545.JPG

(Just google UPD6379 Datasheet).

Burning question... do any games support Stereo?
Click to expand...
Sorry to dig out an old post... Is that the NeoGeo stereo mod board with the centre channel not connected?
Click to expand...
Yes. 100% that.
 
kuze said:
iirc since the encryption is xor based, decryption is the exact same logic. So you can just throw decrypted code in a rom, run it in Mame with debugger enabled, open memory window to get your freshly encrypted code, then put that in your rom. If you need a large chunk mame can dump it for you directly too
Click to expand...
It's not 'only' xor. I'm building a mame which would simply do the reverse of this:

Code: 
void pgm_kovsh_decrypt(running_machine &machine)
{
int i;
uint16_t *src = (uint16_t *) (machine.root_device().memregion("maincpu")->base()+0x100000);

int rom_size = 0x400000;

for(i=0; i<rom_size/2; i++) {
uint16_t x = src[i];

IGS27_CRYPT1_ALT
IGS27_CRYPT2_ALT2
IGS27_CRYPT3_ALT2
IGS27_CRYPT4
IGS27_CRYPT5
IGS27_CRYPT6
IGS27_CRYPT7
IGS27_CRYPT8_ALT

x ^= kovsh_tab[i & 0xff] << 8;

src[i] = x;
}
}
It would be nice to understand C some better so i could cobble together a little program to do this from the command line.
 
Right it's xor'ed against a key, anyways to decrypt or encrypt works the same way.
 
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