Your board has an "under-clocked" 68000 then
Reviewed a few PCB photos on the net (I'm not near my arcade bench) and I couldn't find any differences except the CPU and the oscillator.
- Thread starter Derick2k
- Start date
Reviewed a few PCB photos on the net (I'm not near my arcade bench) and I couldn't find any differences except the CPU and the oscillator.
A
Apocalypse
You just have to replace then 10Mhz crystal by a 12Mhz. The 68k supports quite well overclocking.
Also there are many wrong beliefs regarding the CPU speed. The 12Mhz just gives extra CPU "power" when needed.
In other terms:
- playing a 10Mhz game on a 12Mhz motherboard won't make the game faster. However it may suppress eventual slowdows.
- playing a 12Mhz game on a 10Mhz motherboard can cause slowdowns.
xodaraP
Legendary
I don't see why not, I'll have a look this weekend or if I get some spare time during the week. The only issue is SMD stuff is not my forte
I've got a Dash A board that's dead (liquid spill) that the oscillator is probably still good on, but yeah they're certainly not common
xodaraP
Legendary
Even easier, if that's the case I can really easily do that. Is the only difference with the Dash board really the 12mhz upgrade?
It seems strange people aren't converting 10mhz boards to 12mhz everywhere, aside from the potential damage in the future to the CPU from being overclocked, which can be solved with a small heatsink/fan on the CPU
Then again, SNK and Capcom loved to do this and the boards have mostly lasted really well. MVS and CPS1 boards (and possibly CPS2) are notorious for underrated Z80s instead of Z80As
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A
Apocalypse
It's available at Jaycar, Element14, Radiospares, etc.
Even on alieexpress or ebay for $1 a pop delivered if you want to go the cheap route and can wait 4 weeks before you get it.
xodaraP
Legendary
Oh I know you can buy them readily enough, but they're not common on scrap boards 
though nowhere near as rare as the oscillators on 16A hardware (I forget the frequency off the top of my head) - the only place I could find those was on eBay out of Israel
though nowhere near as rare as the oscillators on 16A hardware (I forget the frequency off the top of my head) - the only place I could find those was on eBay out of Israel
J
jassin000
That ^
I believe as time progressed it actually became harder/more expensive for Capcom to source the 10mhz rated CPUs.
Does anyone have any hires scans of all these different boardtypes ?
Stefan Lindberg quality would be nice
http://arcade.ym2149.com/pcb/capcom.html
Still missing a picture of a DASH board and one from Punisher or C&D
If you look at the pictures on his site you can see that the 3 motherboards are all different:
89626A-4 : Carrier Air Wing
88617A-7 : Magical Sword (Components missing)
88617A-5 : Daimakaimura
Stefan Lindberg quality would be nice
http://arcade.ym2149.com/pcb/capcom.html
Still missing a picture of a DASH board and one from Punisher or C&D
If you look at the pictures on his site you can see that the 3 motherboards are all different:
89626A-4 : Carrier Air Wing
88617A-7 : Magical Sword (Components missing)
88617A-5 : Daimakaimura
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ShootTheCore
Legendary
I’d be interested in a photo of all 4.
The heatsink sounds like a very good idea, I am tempted to add it to my PCBs.I fitted that heat sink on top of the CPS-A-01 asic. Infact it is probably just my "superstition"
As you know that asic is famous for going bad in time. I just thought, if heat contributes to that degradation, even just a little, that heat sink might as well help just a little.
Do you have the type / part number of the one you used ?
Here is a heatsink comparison test I did a while back
https://shmups.system11.org/viewtopic.php?f=5&t=42649&p=904808#p904808
Same here, all 4 please
I bought a few of those heat sinks from local electronics parts store here. It is aluminum and has a 3M sticky tape on the back and the size is 2.7 cm x 2.7 cmThe heatsink sounds like a very good idea, I am tempted to add it to my PCBs.I fitted that heat sink on top of the CPS-A-01 asic. Infact it is probably just my "superstition"
As you know that asic is famous for going bad in time. I just thought, if heat contributes to that degradation, even just a little, that heat sink might as well help just a little.
Do you have the type / part number of the one you used ?
Here is a heatsink comparison test I did a while back
https://shmups.system11.org/viewtopic.php?f=5&t=42649&p=904808#p904808
xodaraP
Legendary
For those who requested them - photos of the full CPS1.5 stack from Warriors of Fate - I have left them on Dropbox so you can view them in full resolution, they're not the best photos because it's under lights rather than with natural light, but I can potentially take better photos on the weekend. I did take all the boards out of the case to take the photos so I could try and get the best photos I could. Without further ado:
Outer casing: https://www.dropbox.com/s/ckqdkn203k06twa/File 10-1-18, 20 23 42.jpeg?dl=0
C board top: https://www.dropbox.com/s/fndqksvopvxzl52/File 10-1-18, 20 24 27.jpeg?dl=0
C board bottom: https://www.dropbox.com/s/0knry32g5felh1s/File 10-1-18, 20 25 16.jpeg?dl=0
B board: https://www.dropbox.com/s/u45mugrosoyvxl6/File 10-1-18, 20 26 22.jpeg?dl=0
Q Sound board: https://www.dropbox.com/s/e2qnzwl3wrov1yc/File 10-1-18, 20 27 44.jpeg?dl=0
Q Sound board right side with Kabuki: https://www.dropbox.com/s/8zdzlln2ezy252i/File 10-1-18, 20 29 04.jpeg?dl=0
Q Sound board left side with Q1 chip: https://www.dropbox.com/s/64j5m1cfeqhku1j/File 10-1-18, 20 29 40.jpeg?dl=0
A board: https://www.dropbox.com/s/hblu924bb3l9hts/File 10-1-18, 20 32 10.jpeg?dl=0
A board right side: https://www.dropbox.com/s/e46sq0kuga7wd7y/File 10-1-18, 20 32 57.jpeg?dl=0
A board left side: https://www.dropbox.com/s/8umrpomwc59yrvj/File 10-1-18, 20 33 45.jpeg?dl=0
A board where the amplifier would be if it had one installed (I thought it was interesting they even cleared the holes for installation): https://www.dropbox.com/s/le90tmtnfhnac9a/File 10-1-18, 20 38 14.jpeg?dl=0
A board where DIP switches would be if they existed on this board: https://www.dropbox.com/s/exagrcvt29ly7q3/File 10-1-18, 20 38 50.jpeg?dl=0
I did notice that the Q Sound board has the designation 92636D-3 - so does that mean it should be referred to as the D board?
Outer casing: https://www.dropbox.com/s/ckqdkn203k06twa/File 10-1-18, 20 23 42.jpeg?dl=0
C board top: https://www.dropbox.com/s/fndqksvopvxzl52/File 10-1-18, 20 24 27.jpeg?dl=0
C board bottom: https://www.dropbox.com/s/0knry32g5felh1s/File 10-1-18, 20 25 16.jpeg?dl=0
B board: https://www.dropbox.com/s/u45mugrosoyvxl6/File 10-1-18, 20 26 22.jpeg?dl=0
Q Sound board: https://www.dropbox.com/s/e2qnzwl3wrov1yc/File 10-1-18, 20 27 44.jpeg?dl=0
Q Sound board right side with Kabuki: https://www.dropbox.com/s/8zdzlln2ezy252i/File 10-1-18, 20 29 04.jpeg?dl=0
Q Sound board left side with Q1 chip: https://www.dropbox.com/s/64j5m1cfeqhku1j/File 10-1-18, 20 29 40.jpeg?dl=0
A board: https://www.dropbox.com/s/hblu924bb3l9hts/File 10-1-18, 20 32 10.jpeg?dl=0
A board right side: https://www.dropbox.com/s/e46sq0kuga7wd7y/File 10-1-18, 20 32 57.jpeg?dl=0
A board left side: https://www.dropbox.com/s/8umrpomwc59yrvj/File 10-1-18, 20 33 45.jpeg?dl=0
A board where the amplifier would be if it had one installed (I thought it was interesting they even cleared the holes for installation): https://www.dropbox.com/s/le90tmtnfhnac9a/File 10-1-18, 20 38 14.jpeg?dl=0
A board where DIP switches would be if they existed on this board: https://www.dropbox.com/s/exagrcvt29ly7q3/File 10-1-18, 20 38 50.jpeg?dl=0
I did notice that the Q Sound board has the designation 92636D-3 - so does that mean it should be referred to as the D board?
Doesn't having tape on a heatsink defeats the purpose of having good contact to improve heat dissipation?
