I already told you where to start. I don’t know why you continue to go on.
Purchased a VGA GERT666 GPIO to VGA adapter and on it's way...
I can't test it yet again I'm using this on Rapsberry Pi 3b+, someone mentioned that the drivers are already present etc. Also to note I've seen this posted within the instructions which is confusing to me as to this, do I just cut and paste this into the config.txt file:
Technology Support:
Edit /boot/config.txt file with vim.tiny or other editor. and modify as following:
framebuffer_width=800
framebuffer_height=600
dpi_group=2
device_tree=bcm2710-rpi-3-b.dtb
dpi_mode=86
dtparam=i2c_arm=off
dtparam=spi=off
dtparam=uart0=off
dtparam=uart1=off
dtoverlay=pi3-disable-bt-overlay
dtoverlay=vga666
enable_dpi_lcd=1
display_default_lcd=1
force_pwm_open=0
dtparam=audio=on
start_x=1
gpu_mem=128
Note: Please disable the functions of all the GPIO Pins so that it can work properly, 800x600
resolution is highly recommended as higher resolution will slow down your Pi and cost more
RAM
Is this just overriding the HDMI the way this is setup ? I want obviously both HDMI out to VGA and GPIO to VGA in order for it to display on both monitorsNext step would be setting up MAME/RetroArch.
What exactly do I need to modify no ones given me definitive instructions within this entire thread on how to do so. Also have not gotten a response to will this setup work in conjunction with MAME Libretro 2003 .78 or Do I need to use MAME .159 aka Libretro 2014 / RetroArch/ if so what needs to be changed within the parameters of the .ini / config files... yet still not one person posted that.
I simply need to know where the "file / config / ini" for MAME what version I need to use for it to work, what needs to be modified for this to work, I'm only using this for the Dual Screen Games and NO other games will be present on the machine. I have access to WinSCP / can connect and modify the .txt / .ini files via notepad++ overwifi / network. I can't modify anything IF i don't know exactly what I need to modify to get this working.