MiSTer FPGA Forum

128M SDRAM module installed on GPIO_0
Please help check the attached video.
Thanks

What is vsync_adjust set to in your MiSTer.ini and which power supply are you using?

[edit] I've also noticed the memory icon is indicating that no SDRAM module is installed, you might want to check it is installed correctly.

AngelicLiver wrote: ↑Wed Oct 11, 2023 11:57 am

What is vsync_adjust set to in your MiSTer.ini and which power supply are you using?

[edit] I've also noticed the memory icon is indicating that no SDRAM module is installed, you might want to check it is installed correctly.

Thanks for your explanation. The vsync_adjust is set to 0. And yes, the SDRAM module is actually installed but not detected. Myabe the SDRAM is broken . So my question is this main menu display also needs SDRAM module?

The main menu does not need SDRAM but installed incorrectly it can cause issues (or even damage the DE10-Nano). I've seen power supplies with insufficient amperage causing problems like this too.

Power supply is using the one in the DE10-nano kit.

AngelicLiver wrote: ↑Wed Oct 11, 2023 12:50 pm

The main menu does not need SDRAM but installed incorrectly it can cause issues (or even damage the DE10-Nano). I've seen power supplies with insufficient amperage causing problems like this too.

Thanks again. I'll check all the three things you mentioned.

andrezheng wrote: ↑Wed Oct 11, 2023 12:50 pm

Power supply is using the one in the DE10-nano kit.

I would strongly consider upgrading that; it doesn't really have the amperage to run the DE10-Nano along with connected peripherals with higher power draws.

Also try a different HDMI cable.

Update
Failed with below tests, Still periodically blanks:
(1)vsync_adjust = 0
(2)vsync_adjust = 1
(3)vsync_adjust = 2
(4)Installed 128 SDRAM module correctly
(5)Use different 5V power supplys

If you have other CEC capable devices in your setup, decouple them. If the problem still persists its not CEC. If it goes away, you need a CEC-blocker.

But if I we're a betting man I would go with @AngelicLiver 's suggestion and try a proper 4A/5V power supply and start with a bare minimum setup, just to rule other components out.

I've found this in the log file when blamk screen happens. Why the i2c bus can't be found? Is this i2c related to SOC<->ADV7513 or ADV7513 <-> HDMI Monitor? Anybody knows this? Thanks

INI_PARSER : Opened file yc.txt with size 7680 bytes.
INI_PARSER : Got yc_mode 'JTCPS1_59.6' with VALUE 40997539300
INI_PARSER : Got yc_mode 'JTCPS15_59.6' with VALUE 40997539300
*** ADV7513 not found on i2c bus! HDMI won't be available!
*** ADV7513 not found on i2c bus! HDMI won't be available!
EDID: cannot find main i2c device
Calculate PLL for 74.2500 MHz:

andrezheng wrote: ↑Wed Oct 18, 2023 4:08 am

I've found this in the log file when blamk screen happens. Why the i2c bus can't be found? Is this i2c related to SOC<->ADV7513 or ADV7513 <-> HDMI Monitor? Anybody knows this? Thanks

INI_PARSER : Opened file yc.txt with size 7680 bytes.
INI_PARSER : Got yc_mode 'JTCPS1_59.6' with VALUE 40997539300
INI_PARSER : Got yc_mode 'JTCPS15_59.6' with VALUE 40997539300
*** ADV7513 not found on i2c bus! HDMI won't be available!
*** ADV7513 not found on i2c bus! HDMI won't be available!
EDID: cannot find main i2c device
Calculate PLL for 74.2500 MHz:

I used oscilloscope to monitor the SDA/SCL signal bus of SOC<->ADV7513. There's correct signal detected on I2C bus during boot up stage. The i2c signal lost when I choose to load any game. Weird.