User guide

4-8

Simulating Your Design

Restarting at the CLI Prompt

The $restart system task allows you to restart the simulation at

the CLI prompt. Enter it with the name of the check file created by

the $save system task. For example:

C1 > $restart("checkfile1");

Specifying a Very Long Time Before Stopping

Simulation

You can use the +vcs+stop+time runtime option to specify the

simulation time when VCS halts simulation. This works if the time

value you specify is less that 2

or 4,294,967,296. You can also use

the +vcs+finish+time runtime option to specify when VCS not

just halts but ends simulation. This is also with the proviso that the

time value be less than 2

For time values greater than 2

you must follow a special procedure

that uses two arguments to the +vcs+stop or +vcs+finish

runtime options. This procedure is as follows:

1. Subtract 2 X 2

from the large time value.

So, for example if you want a time value of 10,000,000,000 (10

billion):

10,000,000,000-(2*4,294,967,296)=(1,410,065,408)