Software Support > Automated Projects
Setting up Mame / Mala with rotating CRT (Mrotate4)
Ropi Jo:
10 years ago this guy had snaps in Mala / Mame in H and V. A different layout though.
DaOld Man:
Yeah my H and V layouts work fine. You may need to check your layout make sure you have a snap window and not a video window. (I think you can have both so if video is present, snap will be covered by it.)
Anyway, i think I have Mrotate4 ready to try.
You need to check your motherboards manual and see if it has a DB9 comport connector or a DB25.
If you have both, use the DB9, if you only have the DB25will have to cross reference the pins from DB9 to DB25. Not as hard as it sounds, just juggling wires.
I would be surprised if you only have the DB25, because that is pretty old technology.
You will need a adapter cable to go from the DB connector on the motherboard to a comport connector. (9 or 25 pin).
If you want to risk plugging the wires on the proper pins on the motherboard you can, but I wouldnt advise it unless you are experienced. And use connectors made for those pins, such as breadboard jumpers.
Anyway, run this program and do setup first. Set which pins you are using for which output.
You want need the inputs so just leave them alone.
Set inputs to look for high when made.
Set timeouts for 1 second.
you can test this program without doing any wiring.
remember you cannot connect the comport pins directly to your current buttons. You will need transistors or optoisolators. I have a couple optoisolators I can give you if you pm me your mailing address.
Anyway, we can discuss circuits when you get to that point.
I have decided to store this file in the downloads thread in this forum (automated projects). Go there to download mrotate4. I will post any updates there.
Ropi Jo:
Thank you. That was dam quick.
I will try to find out if it's DB9 or DB25. I don't know what that means or what the difference would be but the mobo is only 4 yrs old so I'd guess it has the newer standard. I'll find out for sure.
I've got opto's and all manor of transistors and low current relays for the switching. Think darlingtons may be the order of the day, but I'll have a think. Does the serial port give 5V or 12V output? Assume it's one of those as they are the main supplies to the mobo.
I'll check the prog does what we think it'll do (assuming I set things up right) and make a working circuit and then marry them up.
Regarding H and V snap issues, I've turnd off any mention in the config for video. And I'm using the default mala layout (the space invaders background). It's not been modified in any way.
I can't find any settings to make H and V behave differently. But if I had a seperate layout for H and V where would I tell Mala which one to use in H and V?
Is there any chance you can send me your mala layouts to try? I can't find anything to download and I know I could never make them.
All I want is a scrolling list with snaps. Nothing fancy at all.
I'm fine with electronics (I am a qualified TV / Video engineer and qualified electrician, albeit an old one who's forgotten most of what I learned) but computers have left me in the dark age.
Ropi Jo:
I thought that was a serial port on the mobo but it's not. It's the VGA. But, I've got a PCIE Serial card on it's way.
Ropi Jo:
Started on the auto degaus today. Managed to grab a couple of hours in-between SWIMBOs 'jobs-for-the-weekend'.
Hope to have this part completed by the time the serial card arrives later in the week. Will update.
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