This file contains notes on the internal commands sent between tkgate and the simulator verga.

Commands recognized by simulator:

$script <file>					Read a verilog script file
$show <net>					Show current value of net
$sendto <q> <value>				Put value in named channel
$cpath <n>					Do a critical path analysis
$set <net> <value>				Set a net to a value
$break <id> <expr>				Create a breakpoint
$delete_break <id>				Delete a breakpoint
$probe <net> [<who>]				Monitor a net
$unprobe <net> [<who>]				Remove a monitor from a net
$memload <fmt> <file> [<mem>]			Load a memory(s) from a file
$memdump <fmt> <file> <mem>			Dump a memory to a file.
$time						Report current time
$step [<n>]					Step simulator a number of epochs.
$addclock <net>					Register 'net' as a clock.
$stepclock <+/-> <ncycle> <nafter> [<gate>]	Step simulator a number of clock cycles.
$wait						Wait for all events to be executed.
$stop						Pause simulator.
$go						Put simulator in continuos mode.
$exit						Exit the simulator

Commands sent from simulator to tkgate: 

stop @ <t>					Indicate simulator is stopped
break <n> @ <t>					Indicate simulator is stopped at a breakpoint
time @ <t>					Report of current simulator
valueof <who> <net> <value> @ <t>		Report value of a net to a tkgate listener
comment <text>					Comment command. Ignored by tkgate.
echo <text>					Text to be displayed as is.
error file <text>				Error message with
error gate <gate> <text>			Error occuring related to a gate/module
error net <net> <text>				Error occuring related to a net
error run <text>				Run-time error report
error command <text>				Error in command from tkgate
