Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: liukang7 on July 15, 2023, 08:37:55 pm

Title: Monitor picture doubling upon EDID emulation activation
Post by: liukang7 on July 15, 2023, 08:37:55 pm

Hello everyone. I am attempting to install groovymame and crtemudriver to play MK1-UMK3 in a dedicated cabinet on a Wells Gardener K7000 monitor. I have an HP Workstation Z230 running a fresh install of Windows 10, the newest release of mame and groovymame, and crtemudriver 2.0. I am using an AMD Radeon HD 7700 graphics card and a DVI-I adapter to VGA. The VGA goes into a GBS-8100 that then splices into the RGB ground and sync wires of the monitor. I get a picture on the monitor through this in 640x480, but when I activate EDID emulation and start mame the picture doubles on top of itself and flickers. Sometimes the issue happens only when I am in groovymame and it disappears upon closing it, but sometimes it starts as soon as emulation is enabled. I am unsure of what is causing this other than if the GBS-8100 is interfering with it, but I am otherwise unsure of how to connect the VGA wire to the monitor. If there is any more info I can provide let me know and I can. Thanks!

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: buttersoft on July 17, 2023, 12:11:18 am

Can you remove the GBS-8100 from the signal chain and test if that helps?

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: liukang7 on July 17, 2023, 01:31:04 am

How do I go about connecting the VGA cable to the wires of the monitor?

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: buttersoft on July 17, 2023, 06:54:10 pm

https://www.aliexpress.com/item/1005005830433586.html?spm=a2g0o.productlist.main.33.12e04d32MICprO&algo_pvid=53e84cd2-6799-4258-844f-f941fe418f10&algo_exp_id=53e84cd2-6799-4258-844f-f941fe418f10-16&pdp_npi=3%40dis%21AUD%212.50%211.61%21%21%211.68%21%21%40211bd7bf16896343973017667d07b6%2112000034502911261%21sea%21AU%21188447758&curPageLogUid=uxNxvIqIwcXU

Something like that will do the job. Google up the VGA pinout, and then post up if you need more help :)

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: liukang7 on July 17, 2023, 10:18:20 pm

Thank you! I will update when it arrives.  :D

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: liukang7 on July 19, 2023, 09:40:40 pm

Update: It works! Thank you so much for the suggestion I would not have figured that out on my own.  When I wired it up I had issues with vertical scrolling but once I enabled composite sync and adjusted the values in the monitor file it fixed it. Looks awesome now   :D

Title: Re: Monitor picture doubling upon EDID emulation activation
Post by: buttersoft on July 20, 2023, 06:34:42 pm

Nice job! Happy to help, though TBH i was just eliminating one, technically unneeded, link in the chain to narrow down the problem. Glad to hear it worked, lol :)

Next step would be to report the issue to the GBS-control thread on Shmups. Might be valuable info to them.