Modelsim clock settings...

[davorin]

modelsim clock

Is this behaviour normal that in the wave window it always reverts to "100" clock period even after entering for example "40 ns" ?

Simulation is correct though but it doesn't display last settings in 58d...

 

[omara007]

modelsim + clock latch

No it's not normal .. it should work properly .. try using another design with ur clock settings .. sometimes modelsim gives some trash to the designers

 

[davorin]

set clock in modelsim

Hmm..but should at least simulation of supplied HEX file for initial RAM block be working in Modelsim?


Works fine withing Quartus....

update:

Same simulation which runs fine in Quartus produces strange output in m58d...like some signals are switching between "1" and "X" or "0" and "X"...

 

[omara007]

adding a clock in modelsim

I used to have different simulation results when using Aldec Active HDL and Modelsim .. but unfortunatly , though Modelsim is considered No. 1 simulator all over the world for HDL, Aldec was the one with the right results ..
so , if u went thru a similar experience .. of using 2 simulators .. don't take something for granted except is u tried to be urself a simulator ..

Don't be amazed ..