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Darksoft CPS-1 Multi: Preview / Sneak Peek / Information - FINALLY!

GeorgeSpinner said:
I apologize if this has been stated clearly already, but I'm still in doubt about something.

I only have cheap CPS-1 conversions. They all have 92641C-1 with the wire soldered, and the battery removed.

I believe I read that this is no-good for encrypted ROMs; Maybe no-good at all for DarkSoft CPS-1.

Is that the case?

Can I use unencrypted ROMs with DarkSoft CPS-1? Are they readily available?

Can I restore the functionality of my 92641C-1 to make it fully functional; or functional enough?

Thanks.
Click to expand...
You can use that C board. You just need to undo the patch. It's exactly the same procedure as if you were going to use it for infinikeys.
 
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Darksoft said:
You can use that C board. You just need to undo the patch. It's exactly the same procedure as if you were going to use it for infinikeys.
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So decrypt roms is not an option? And is it not possible to have the B21 locked / z80 standard and run everything as normal?
 
Please tell me how did you reach that conclussion? If it can run encrypted roms, it can of course run decrypted roms.

If you dont undo the patch, then the B21 will always run as B21 in default mode and it cant be configured to run as another Bxx. People want to run untouched original code.

Each game folder has several configuration files where you can choose the type of B file used or the type of PAL graphic that is being used, the name displayed in the LCD, etc.

So if you want to run a game patched for B21, just change the config file to B21 and it will run with that type of C board that has B21 running in default mode.
 
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Darksoft said:
Please tell me how did you reach that conclussion? If it can run encrypted roms, it can of course run decrypted roms.
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That's a question, not a conclusion ;)

Darksoft said:
If you dont undo the patch, then the B21 will always run as B21 in default mode and it cant be configured to run as another Bxx.
Click to expand...
Correct, so it IS possible to keep it locked and skip the config file and run decrypted only?
 
Darksoft said:
Please tell me how did you reach that conclussion? If it can run encrypted roms, it can of course run decrypted roms.

If you dont undo the patch, then the B21 will always run as B21 in default mode and it cant be configured to run as another Bxx. People want to run untouched original code.

Each game folder has several configuration files where you can choose the type of B file used or the type of PAL graphic that is being used, the name displayed in the LCD, etc.

So if you want to run a game patched for B21, just change the config file to B21 and it will run with that type of C board that has B21 running in default mode.
Click to expand...
Thanks for the reply. This is good news for me, because I've been looking forward to this multi.

Based on your reply, it seems like I have 2 options.

1. Undo the C board patch and run all games with untouched original code.

2. Don't undo the C board patch and ALL (really?? All???) games can be automatically patched (based on config) to run in B21 mode? That sounds pretty amazing, if I understand you correctly.

Regarding the undoing of the patch, is there documentation somewhere? My recollection (which is probably not correct) is that I have to remove the wire and repair a cut trace? Or was that just some type of weird CPS-1 based dream I had (I've really had them)?
 
GeorgeSpinner said:
2. Don't undo the C board patch and ALL (really?? All???) games can be automatically patched (based on config) to run in B21 mode? That sounds pretty amazing, if I understand you correctly.
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It won't auto-patch that's for sure..
But will it run already patched games... with a locked C board.. as normal... that is the question :)
 
Hammy said:
But will it run already patched games... with a locked C board.. as normal... that is the question
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I believe I'm with @Hammy on this... My desire is to run B21 patched ROMs with a battery-less B21 C-board (same used by SF2:CE and basically every conversion I've ever had).
That way a perfect doner IS SF2:CE, as it also has the 12mhz dash A-board default/factory (basically the best motherboard for this multi).

I can tell you as someone who loved/played the shit out of SF2:HF it plays differently (ie the additional slowdown both prevents and enables some unusual combos) if run on a 10mhz A-board/crystal.
 
jassin000 said:
I believe I'm with @Hammy on this... My desire is to run B21 patched ROMs with a battery-less B21 C-board (same used by SF2:CE and basically every conversion I've ever had).
That way a perfect doner IS SF2:CE, as it also has the 12mhz dash A-board default/factory (basically the best motherboard for this multi).

I can tell you as someone who loved/played the shit out of SF2:HF it plays differently (ie the slowdown both prevents and enables some unusual combos) if run on a 10mhz A-boards/crystal.
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I have heard the same, regarding HF.

Any idea how to patch the roms? Can all roms be patched?

It might end up actually being less of a pain in the ass for me to undo the C board hardware patch than to patch all the games.

I'm sure at some point a pack will be released with all the games already patched, but I know I'm gonna wanna hit the ground running on day 1.
 
jassin000 said:
That way a perfect doner IS SF2:CE, as it also has the 12mhz dash A-board (basically the best motherboard for this multi).
Click to expand...
Agree, already have a few of these as donors, and had one fitted with the HDMI mod. SF2:CE seems to be the best donor boardset.
 
Darksoft said:
You can use that C board. You just need to undo the patch. It's exactly the same procedure as if you were going to use it for infinikeys.
Click to expand...

twistedsymphony said:
I just wanted to comment that I recently de-de-suicided two 92641C-1 C-Boards

normally the B-21 chip has 3 pins in a row tied to ground on this chip, the de-suicide mod cuts the traces to two of these pins and ties them to +5V. with the 3rd pin still tied to ground.

to de-de-suicide I simply removed the wire, then soldered the 3 pins together; such that the two pins with the cut traces were now using the 3rd pin's connection to ground.

After doing this I was able to install a fresh battery, revive the keys and use the board as it was originally intended.
Click to expand...

Just to clarify. I own a 92641c-1 obtained from @sheep_nova that has the battery removed. In order to use this board I would need to de-de-suicide as @twistedsymphony has outlined here. Do you need to install a battery as well?

Otherwise as is, I would have to edit the config files for each game to accept the b-21 chip, correct?
 
GeorgeSpinner said:
Any idea how to patch the roms? Can all roms be patched?
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Well I'm not sure how the @Darksoft multi will differ from "normal" conversions...
But yea MOST B21 patched CPS1 games already exist as we've been using them for conversions for YEARS now. ;)

I personally sold B21 conversions (as conversions not OG) of Captain Commando, Knights of the Round and GnG on this very forum.
 
The patched sets offload multiplication functions of the C chip to the CPU , along with NOT key-writing (saving r/w cycles there)

For me, it's an old chip and dies often, no point speeding up the process when there's these ways to cut the action down :)
 
Hammy said:
The patched sets offload multiplication functions of the C chip to the CPU , along with NOT key-writing (saving r/w cycles there)

For me, it's an old chip and dies often, no point speeding up the process when there's these ways to cut the action down :)
Click to expand...
Interesting, had not considered this. Really haven't heard this mentioned before either. Maybe using patched roms is the best way.
 
What about a game like MERCS which was originally designed for 10mhz, how will it run on the dash 12mhz? Will you notice a difference?

I have a broken MERCS long board, (with a presumably good 10mhz crystal) could you somehow desolder both crystals and interchange them with some kind of socket on the dash board?
 
Wraith said:
What about a game like MERCS which was originally designed for 10mhz, how will it run on the dash 12mhz? Will you notice a difference?

I have a broken MERCS long board, (with a presumably good 10mhz crystal) could you somehow desolder both crystals and interchange them with some kind of socket on the dash board?
Click to expand...
Despite their appearance, the crystals have a standard DIL14 footprint. So you can install a standard DIL14 socket, you just have to remove/trim the inner 10 pins to just leave the four at the corners as there won't be any matching holes on the PCB for them.
 
jassin000 said:
Well I'm not sure how the @Darksoft multi will differ from "normal" conversions...
But yea MOST B21 patched CPS1 games already exist as we've been using them for conversions for YEARS now. ;)

I personally sold B21 conversions (as conversions not OG) of Captain Commando, Knights of the Round and GnG on this very forum.
Click to expand...
I don't know why I hadn't considered this. Thanks for pointing it out. My only CPS1 games are conversions.

Perhaps I overlooked them, but I have never seen a repository of the patched roms.

If there isn't one, we should probably start assembling it. It's going to be in demand.
 
bodgit said:
Despite their appearance, the crystals have a standard DIL14 footprint. So you can install a standard DIL14 socket, you just have to remove/trim the inner 10 pins to just leave the four at the corners as there won't be any matching holes on the PCB for them.
Click to expand...

Anyone done this before? Would it be sacrilege to do this to a dash board?
 
So is the new A/B/C stack still compatible with a CPS2 Digital Interface?
 
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