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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Thu May 11, 2017 3:45 pm Post subject: Double Pro Fighter Q+ CDROM version? |
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Hi all,
I was wondering if anyone can help me here, I recently repaired an old Double Pro Fighter unit that I've had laying around for 15+ years (The unit was acquired in a non working state).
After replacing all of the caps & voltage regulator the unit now boots up into the main menu. Can someone tell me if this bios is common? I thought I read on here somewhere that no CDROM bios exists for the DPF?
It also has a couple of other issues, Only shows 8M of dram & 0K sram, Also game carts booted from the cart slot do not work.
Any advise would be greatly appreciated
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Mystic_Merlin
Joined: 15 Oct 2007 Posts: 508 Location: Bangkok
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Posted: Thu May 11, 2017 4:44 pm Post subject: Re: Double Pro Fighter Q+ CDROM version? |
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BigJohnnyM wrote: | Hi all,
I was wondering if anyone can help me here, I recently repaired an old Double Pro Fighter unit that I've had laying around for 15+ years (The unit was acquired in a non working state).
After replacing all of the caps & voltage regulator the unit now boots up into the main menu. Can someone tell me if this bios is common? I thought I read on here somewhere that no CDROM bios exists for the DPF?
It also has a couple of other issues, Only shows 8M of dram & 0K sram, Also game carts booted from the cart slot do not work.
Any advise would be greatly appreciated |
Hello BigJohn,
Interesting BIOS indeed, you could dump it and compare it with the original DPF.
AFAIK no bios apart from the FX64 I posted here some time ago has built-in CD-ROM support. As for the GB Smart Card, you had to run the software from a disk.
Regarding your RAM issue, is it an original DPF Ram board board? Do you get different readings when you reseat it?
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Thu May 11, 2017 6:34 pm Post subject: Re: Double Pro Fighter Q+ CDROM version? |
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Mystic_Merlin wrote: |
Hello BigJohn,
Interesting BIOS indeed, you could dump it and compare it with the original DPF.
AFAIK no bios apart from the FX64 I posted here some time ago has built-in CD-ROM support. As for the GB Smart Card, you had to run the software from a disk.
Regarding your RAM issue, is it an original DPF Ram board board? Do you get different readings when you reseat it? |
Hi Merlin,
I don't have a copy of the original DPF bios, If you can point me to where I can find it that would be great. I have a rom burner & can dump/burn my own roms so no issue there.
I've posted a pic of my ram board here & it always reads as 8M no matter how many times I reseat it.
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MottZilla
Joined: 08 Sep 2004 Posts: 765
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Posted: Fri May 12, 2017 4:06 am Post subject: |
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Something else may be wrong if it's detecting no internal SRAM. The issue causing that may be related to only detecting 8M of DRAM and the cart slot not running games.
After you backup the BIOS you might want to try using a fresh EPROM with a known good BIOS and see if that changes anything, incase bitrot in the BIOS is causing issues.
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Mystic_Merlin
Joined: 15 Oct 2007 Posts: 508 Location: Bangkok
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Posted: Fri May 12, 2017 5:17 am Post subject: Re: Double Pro Fighter Q+ CDROM version? |
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BigJohnnyM wrote: |
Hi Merlin,
I don't have a copy of the original DPF bios, If you can point me to where I can find it that would be great. I have a rom burner & can dump/burn my own roms so no issue there.
I've posted a pic of my ram board here & it always reads as 8M no matter how many times I reseat it. |
Your RAM board is the original one. You can find the bios here:
https://randomsonicnet.org/workshop/
Also if you suspect your SRAM is faulty you could switch it with a SPPFQ one or even start the DPF without one.
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Fri May 12, 2017 2:00 pm Post subject: Re: Double Pro Fighter Q+ CDROM version? |
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Mystic_Merlin wrote: |
Your RAM board is the original one. You can find the bios here:
https://randomsonicnet.org/workshop/
Also if you suspect your SRAM is faulty you could switch it with a SPPFQ one or even start the DPF without one. |
That site is 403 forbidden unfortunately.
I've backed up the rom & will use another eprom if a can obtain the regular DPF bios.
The CIC of this DPF is a ST10198P. I swapped it out with a ST10198S from a non working SPFQ I have spare. Now SRAM reads as 256K but I still get only 8M DRAM.
Any game cart I try run thru the top slot seems to not work (Black screen except for a PAL copy of Super Mario AllStars which shows the country error screen (I'm running it on a US snes).
Other odd behaviour is that even with no cart in the top slot it reads the cart rom size as 6M?
I do not have the megadrive adapter either so I can't test it on one.
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Mystic_Merlin
Joined: 15 Oct 2007 Posts: 508 Location: Bangkok
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Posted: Fri May 12, 2017 2:13 pm Post subject: |
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Forbidden? That's weird, I have no problem accessing it. Here's the bios.
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Fri May 12, 2017 2:21 pm Post subject: |
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Mystic_Merlin wrote: | Forbidden? That's weird, I have no problem accessing it. Here's the bios. |
Thanks Merlin, I'll burn it to a fresh 27c512 & see how it goes.
The sram reading went back to 0M again so I took out the sram chip & noticed that the pins are tarnished. Cleaned the sram up & now it's back to reporting as 256K sram installed.
I've just noticed with any cart in the top slot larger than 12M it just shows it as 12M. It accurately shows the correct rom size of any cart 12M or smaller.
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Mystic_Merlin
Joined: 15 Oct 2007 Posts: 508 Location: Bangkok
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Posted: Fri May 12, 2017 2:45 pm Post subject: |
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BigJohnnyM wrote: |
Thanks Merlin, I'll burn it to a fresh 27c512 & see how it goes.
The sram reading went back to 0M again so I took out the sram chip & noticed that the pins are tarnished. Cleaned the sram up & now it's back to reporting as 256K sram installed.
I've just noticed with any cart in the top slot larger than 12M it just shows it as 12M. It accurately shows the correct rom size of any cart 12M or smaller. |
Mmm that's weird, can you check or swap the 3 74LS245 left of the BIOS/SRAM.
Also check there's no corrosion or cut traces in this area.
I haven't heard of PAL DPF before but I doubt BIOS would need to be altered in any way.
Here's a large shot of the DPF PCB from randomsonic I reuploaded since you can't access the site:
http://imgur.com/a/WAFvY
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Fri May 12, 2017 4:39 pm Post subject: |
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Mystic_Merlin wrote: |
Mmm that's weird, can you check or swap the 3 74LS245 left of the BIOS/SRAM.
Also check there's no corrosion or cut traces in this area.
I haven't heard of PAL DPF before but I doubt BIOS would need to be altered in any way.
Here's a large shot of the DPF PCB from randomsonic I reuploaded since you can't access the site:
http://imgur.com/a/WAFvY |
Ok have burnt & tested all 3x DPF bios that you provided.
All 3x display the "DB. FIGHTER Q+ CD-ROM VERSION" menu screen.
I data compared all 3x bios against my bios dump & it is identical to your DPF 27512 bios.
I removed all 3x 74LS245 ICs. They were all clean but the IC sockets look a little tarnished. I cleaned the ICs & sockets but no change.
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Mario64
Joined: 01 Sep 2011 Posts: 88
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Posted: Sat May 20, 2017 5:01 am Post subject: |
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What CDROM drive does this support?
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Mon May 22, 2017 1:38 pm Post subject: |
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I've ordered a bunch a new IC sockets & will replace them all on the board with the hope of getting this unit fully working.
So with my bios being the same why does it show as a cd-rom version?
Would it be due to different PAL/GAL chips on the board?
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BigJohnnyM
Joined: 10 May 2017 Posts: 8
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Posted: Mon May 29, 2017 9:44 am Post subject: |
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I replaced all of the IC sockets but my DPF has the same issues.
I removed all 3x 74LS245 chips at U5/U6/U7 & powered up.
It reports 0 DRAM. I place a 74LS245 into U5 only & now it reports 8M DRAM.
Placing a 74LS245 into U6 & U7 does nothing (Still 8M DRAM).
All 3x 74LS245 are new replacements, So I should assume a bad trace around U6 & U7?
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Mystic_Merlin
Joined: 15 Oct 2007 Posts: 508 Location: Bangkok
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