MiSTer FPGA Forum

Sorry to pick this up again. I have a V2.5 SDRAM stick and wanted to order a second one. Is this voltage problem a general problem with V2.5? So if I wan't to run any setup with two SDRAM sticks do I always need version 2.9 sticks? Regards, Michael I don't remeber wich PCB version were my ram sticks, but with both installed i had problems with man...

Hi, I'm sorry, I don't have it anymore, I used it as a temporary solution.

Resolved. The problem was on the 3.3V rail, it was, in certain conditions, overloaded. My two SDRAM 128MB banks were the version directly powered from 3.3V; i modified them adding a voltage regulator as in sdram xds v 2.9.

Hi aberu and caad, thanks for your answers; the SDRAM banks are inserted correctly and SW3 is in ON position, the problem arise in this condition. If i turn OFF SW3 everything works fine, thats why I tought it's something related to I2C communication with IO expander. SDRAMs are also OK I tested both, one a time in "slot 1" for 2 hours ea...

Hello everyone! I have recently replaced the analog IO board with a second SDRAM bank to test PSX core, I have not yet put the digital IO board because I do not have it, after this operation I have noticed instability in the cores, I experienced sudden resets and crashes. Looking at the schematics of the digital io board there is an IO expander tha...