MiSTer FPGA Forum

Hi all,

I have two sd ram 128mb installed and neither is being detected. Any ideas as to why?

Silly question, but it comes up occasionally, (and also happened to me once on one of my builds). Are the pins all aligned correctly? I design PCBs, work with all manner of board interconnects, and I still managed to misalign my SDRAM module on one build I did. Easy to rule this out anyway.

J3RK wrote: ↑Wed Aug 30, 2023 9:17 pm

Silly question, but it comes up occasionally, (and also happened to me once on one of my builds). Are the pins all aligned correctly? I design PCBs, work with all manner of board interconnects, and I still managed to misalign my SDRAM module on one build I did. Easy to rule this out anyway.

Not silly at all. They were not all the way in. I made sure push to them down tight and they work now. Lol. Thanks!!

Now I'm having an issue where none of my CD cores are working. Anyone have any ideas?

Hi Ralph3B

CD-Core Not working is not precise enough to get an answer.
Please describe the issues you have in more detail for every cores.
Also, which Main are you using ? Which build of the core(s) are you using ?

You have set the switches to support Dual Ram.

Note dont do this on an analog IO board as it could cause damage.

But dual ram requires SW3 to be on

Great guide from

https://misterfpga.co.uk/dual-sdram-mister-fpga/

Fresh install got everything working again.