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g007

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  1. Hi everybody! I'm also a digikey customer and got my board about 3 weeks ago - unsurprisingly with the 'edbl' SRAM chip and the same problems other people told before. Foft's hint to change the pin setting does the magic - no ram problems anymore :-) Thank you Foft! I added the following lines to the qsf (atari800core_20140119.tar.xz): set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_CE_N set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_LB_N set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_OE_N set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_UB_N set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_WE_N set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_ADDR[0] ... set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_ADDR[17] set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_DQ[0] ... set_instance_assignment -name CYCLONEII_TERMINATION "SERIES 25 OHMS" -to SRAM_DQ[15] I encountered the same SRAM problems with the ZX Spectrum project where the termination resistors also resolved the problems. I also patched the 'DE1 Control Panel' binary to fix the anoying 'Quartus version bla bla' message, you can download it here. Greets G.
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