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Name for JVS2JAMMA board

Great stuff @sammargh and congrats on new scope! My old DS1052E is ripe for an update :)

From the data it seems that 30ms coin pulse is too short, and 32ms is border line. It's configurable in the software - do you have the time the check CPS1 with a private build where we set it to e.g. 40ms?

The coin delay is intentional as I figured it would have no real impact on usability.
 
Sure, I'm somewhat busy for the next few days but can test later in the week. I ended up going with the Siglent SDS1104X-E because you can unlock it to 200MHz and unlock every feature fairly easily. Turns out all the serials reside in memory and are easy to obtain by forcing a core dump :)
 
Mine is on its way, very exited about it.
Has anyone used a Jpac or a pi jamma setup with this. I was thinking of doing something in the future possibly?
 
jimmyjames said:
Mine is on its way, very exited about it.
Has anyone used a Jpac or a pi jamma setup with this. I was thinking of doing something in the future possibly?
Click to expand...
I had thought about it but I'm waiting for JVS-PAC2 as it is more suitable for that application... Plug "usb" from JVS into it, plug into USB on the pc and you have sticks. Other parts just plug into the pc.
 
sammargh said:
jimmyjames said:
Mine is on its way, very exited about it.
Has anyone used a Jpac or a pi jamma setup with this. I was thinking of doing something in the future possibly?
Click to expand...
I had thought about it but I'm waiting for JVS-PAC2 as it is more suitable for that application... Plug "usb" from JVS into it, plug into USB on the pc and you have sticks. Other parts just plug into the pc.
Click to expand...
Ya I may pick that up also depending. I mainly got this as my dynamo is going to a men’s club with a Pandora’s box in it an I am getting a NNC from cereth.
 
I'm definitely interested in the Retro Scaler A1, as well as a Jammafier or two. I know the RS A1 is still in development, but if you need a tester, I'm your guy. As for the Jammafier, I"m moving stuff around to get on the waiting list.
 
sammargh said:
Sure, I'm somewhat busy for the next few days but can test later in the week. I ended up going with the Siglent SDS1104X-E because you can unlock it to 200MHz and unlock every feature fairly easily. Turns out all the serials reside in memory and are easy to obtain by forcing a core dump :)
Click to expand...
Updated firmware https://irkenlabs.com/jammafier/firmware

Would be great if you could check if it fixed CPS1 issues. I set it to 50ms which should hopefully be enough, but if you save the config you can play around with the .ini file on the sd card to set other durations.

Lemony Vengeance said:
I'm definitely interested in the Retro Scaler A1, as well as a Jammafier or two. I know the RS A1 is still in development, but if you need a tester, I'm your guy. As for the Jammafier, I"m moving stuff around to get on the waiting list.
Click to expand...
Hopefully 2019 will be the year of the scaler :) No waiting list for Jammafiers at the moment, I made a few extra + a few people who pre-ordered bailed out.
 
Cool will give it a try tomorrow

Edit: rather than double-post ended up waking up early for work and threw the firmware on my Jammafier. Seems to be working great, out of the 100 or so coins I dropped only a few mis-registered but I'm attributing that to just dumping a line of them in and being expected behavior. Don't have the time currently to wire up the scope again and look further into it but I'd consider this about 99.999999999% fixed. Thanks for helping!
 
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sammargh said:
Cool will give it a try tomorrow

Edit: rather than double-post ended up waking up early for work and threw the firmware on my Jammafier. Seems to be working great, out of the 100 or so coins I dropped only a few mis-registered but I'm attributing that to just dumping a line of them in and being expected behavior. Don't have the time currently to wire up the scope again and look further into it but I'd consider this about 99.999999999% fixed. Thanks for helping!
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Hey that's great, thanks for testing!

I think the only outstanding issue then is to add a screen-saver for the OLED? If anyone have any issues or features needed, let me know..
 
Ordered some stuff to tinker with during the Christmas holidays.

It's a new prototype of the upscaler, this time with a low-pass filter. It's not really needed for most games, but a couple of boards I have are really noisy (like Moon Patrol and Kung-Fu Master) - and as the OSSC has it, so want to see if it will make a tangible difference.

Also getting parts for a mini-batch of Jammafiers that will be ready early January, only doing 10 as I have a lot of eating and drinking to do - 9 available as of today.
 
I am looking for a product that could convert high resolution on modern video cards and output to a 15khz and 31khz monitor?

I really want to use modern video cards and groovy mame is limited on what you could use.

The product should also protect the monitor if out of range?

This is kinda the opposite of the A1 scaler?
 
It's just a circuit to correct vPP as JAMMA differs from the 0.7vPP standard that the monitor in Net City/New Net City uses. It also has assistance with switching as the monitors have trouble switching sync. It will not apply for what you are wanting to do.
 
lodoss118 said:
I am looking for a product that could convert high resolution on modern video cards and output to a 15khz and 31khz monitor?

I really want to use modern video cards and groovy mame is limited on what you could use.

The product should also protect the monitor if out of range?

This is kinda the opposite of the A1 scaler?
Click to expand...
Yes, sort of opposite. In the A1, A is for analog, so it's anaog->digital processing->analog. In theory it could downscale to 15kHz, but it's not a primary feature. With emucrt drivers(?) and groovymame, you should be able to use modern ati cards with 15khz as long as they have VGA output. I'll dive into this soup when the jvs-pac2 gets a little more attention.


sammargh said:
It's just a circuit to correct vPP as JAMMA differs from the 0.7vPP standard that the monitor in Net City/New Net City uses. It also has assistance with switching as the monitors have trouble switching sync. It will not apply for what you are wanting to do.
Click to expand...
You're thinking of the tri-sync helper :) , and the sync cleaning has a of of magic applied.
 
what i am thinking is maybe a product that could allow any gfx card (geforce rtx) and can handle converting signal to 15khz/31khz and also the resolutions so maybe no hacked drivers needed, everything done on the board lol it's just my dream, important feature is to protect the monitor.
 
lodoss118 said:
any gfx card (geforce rtx)
Click to expand...
lodoss118 said:
no hacked drivers
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These two things are incompatible.

both the hardware and the drivers need to support 15KHz output. no 3rd party product can make "any gfx card" do something it's not designed to do... the only way to do that is to modify the drivers.

You have 2 options for native 15KHz output
1. buy one that supports it without modification (such as Arcade VGA)
2. modify the drivers (such as CRT_EmuDriver)

there are no other options for native output.
 
you can make custom resolutions with nvidia driver tool to output 15khz, it's just way less flexible than crt emu drivers, you can do one custom resolution at a time with limited options, so no multiple modelines with easy switching. To put it shortly, save yourself headache, buy any ati card that is supported by crt emu drivers, and you get instant groovymame goodness.
 
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sammargh said:
jimmyjames said:
Mine is on its way, very exited about it.
Has anyone used a Jpac or a pi jamma setup with this. I was thinking of doing something in the future possibly?
Click to expand...
I had thought about it but I'm waiting for JVS-PAC2 as it is more suitable for that application... Plug "usb" from JVS into it, plug into USB on the pc and you have sticks. Other parts just plug into the pc.
Click to expand...
I just realized they make a vga pi hat and the raspberry pi can use the jammafier usb to power it I think. It also can output 240p out of the hat. Because the jammafier uses the JVS you don’t need a jvs pac just a j-pac. Audio can be pulled right from the pi to the audio amp. Should work pretty good I would think.
 
jimmyjames said:
sammargh said:
jimmyjames said:
Mine is on its way, very exited about it.
Has anyone used a Jpac or a pi jamma setup with this. I was thinking of doing something in the future possibly?
Click to expand...
I had thought about it but I'm waiting for JVS-PAC2 as it is more suitable for that application... Plug "usb" from JVS into it, plug into USB on the pc and you have sticks. Other parts just plug into the pc.
Click to expand...
I just realized they make a vga pi hat and the raspberry pi can use the jammafier usb to power it I think. It also can output 240p out of the hat. Because the jammafier uses the JVS you don’t need a jvs pac just a j-pac. Audio can be pulled right from the pi to the audio amp. Should work pretty good I would think.
Click to expand...
Yes, you can power the pi from the jammafier - I wouldn't use a long thin cable though :) You need to watch your step a bit with this setup and not get overly creative during trouble-shooting and bring-up. A UK customer caused some damage by connecting a 220V mains powered mame-pc with j-pac, to a 110V step-down powered cab/jammafier (everything worked OK with normal PCB's). The exact theory as to what the problem was a little above my pay grade if I'm being honest, but pretty sure it has to do with different grounds/UK PME or possibly unconnected earth on the step-down? I have not tested the Jammafier with a J-PAC, and the jvs-pac is the 'official' solution :)

Added a warning on the operations page after this:
https://irkenlabs.com/jammafier/operation
 
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