IEEE Std 1364 system tasks

Model Technology Inc.

IEEE Std 1364 system tasks

The following system tasks are described in detail in the IEEE Std 1364.

Timescale tasks

Simulator control tasks

Simulation time functions

Command line input

$printtimescale

$finish

$realtime

$test$plusargs

$timeformat

$stop

$stime

$value$plusargs

$time

Probabilistic distribution functions

Conversion functions

Stochastic analysis tasks

Timing check tasks

$dist_chi_square

$bitstoreal

$q_add

$hold

$dist_erlang

$itor

$q_exam

$nochange

$dist_exponential

$realtobits

$q_full

$period

$dist_normal

$rtoi

$q_initialize

$recovery

$dist_poisson

$signed

$q_remove

$setup

$dist_t

$unsigned

$setuphold

$dist_uniform

$skew

$random

$width

$removal

$recrem

Display tasks

PLA modeling tasks

Value change dump (VCD) file tasks

$display

$async$and$array

$dumpall

$displayb

$async$nand$array

$dumpfile

$displayh

$async$or$array

$dumpflush

$displayo

$async$nor$array

$dumplimit

$monitor

$async$and$plane

$dumpoff

$monitorb

$async$nand$plane

$dumpon

$monitorh

$async$or$plane

$dumpvars

$monitoro

$async$nor$plane

$dumpportson

$monitoroff

$sync$and$array

$dumpportsoff

$monitoron

$sync$nand$array

$dumpportsall

$strobe

$sync$or$array

$dumpportsflush

$strobeb

$sync$nor$array

$dumpports

$strobeh

$sync$and$plane

$dumpportslimit

$strobeo

$sync$nand$plane

$write

$sync$or$plane

$writeb

$sync$nor$plane

$writeh

$writeo

File I/O tasks

$fclose

$fopen

$fwriteh

$fdisplay

$fread

$fwriteo

$fdisplayb

$fscanf

$readmemb

$fdisplayh

$fseek

$readmemh

$fdisplayo

$fstrobe

$rewind

$ferror

$fstrobeb

$sdf_annotate

$fflush

$fstrobeh

$sformat

$fgetc

$fstrobeo

$sscanf

$fgets

$ftell

$swrite

$fmonitor

$fwrite

$swriteb

$fmonitorb

$fwriteb

$swriteh

$fmonitorh

$swriteo

$fmonitoro

$ungetc

Note: $readmemb and $readmemh match the behavior of Verilog-XL rather than IEEE Std 1364. Specifically, it loads data into memory starting with the lowest address. For example, whether you make the declaration memory[127:0] or memory[0:127], ModelSim will load data starting at address 0 and work upwards to address 127.

Timescale tasks	Simulator control tasks	Simulation time functions	Command line input
$printtimescale	$finish	$realtime	$test$plusargs
$timeformat	$stop	$stime	$value$plusargs
		$time

Probabilistic distribution functions	Conversion functions	Stochastic analysis tasks	Timing check tasks
$dist_chi_square	$bitstoreal	$q_add	$hold
$dist_erlang	$itor	$q_exam	$nochange
$dist_exponential	$realtobits	$q_full	$period
$dist_normal	$rtoi	$q_initialize	$recovery
$dist_poisson	$signed	$q_remove	$setup
$dist_t	$unsigned		$setuphold
$dist_uniform			$skew
$random			$width
			$removal
			$recrem

Display tasks	PLA modeling tasks	Value change dump (VCD) file tasks
$display	$async$and$array	$dumpall
$displayb	$async$nand$array	$dumpfile
$displayh	$async$or$array	$dumpflush
$displayo	$async$nor$array	$dumplimit
$monitor	$async$and$plane	$dumpoff
$monitorb	$async$nand$plane	$dumpon
$monitorh	$async$or$plane	$dumpvars
$monitoro	$async$nor$plane	$dumpportson
$monitoroff	$sync$and$array	$dumpportsoff
$monitoron	$sync$nand$array	$dumpportsall
$strobe	$sync$or$array	$dumpportsflush
$strobeb	$sync$nor$array	$dumpports
$strobeh	$sync$and$plane	$dumpportslimit
$strobeo	$sync$nand$plane
$write	$sync$or$plane
$writeb	$sync$nor$plane
$writeh
$writeo

File I/O tasks
$fclose	$fopen	$fwriteh
$fdisplay	$fread	$fwriteo
$fdisplayb	$fscanf	$readmemb
$fdisplayh	$fseek	$readmemh
$fdisplayo	$fstrobe	$rewind
$ferror	$fstrobeb	$sdf_annotate
$fflush	$fstrobeh	$sformat
$fgetc	$fstrobeo	$sscanf
$fgets	$ftell	$swrite
$fmonitor	$fwrite	$swriteb
$fmonitorb	$fwriteb	$swriteh
$fmonitorh		$swriteo
$fmonitoro		$ungetc

			Note: $readmemb and $readmemh match the behavior of Verilog-XL rather than IEEE Std 1364. Specifically, it loads data into memory starting with the lowest address. For example, whether you make the declaration `memory[127:0]` or `memory[0:127]`, ModelSim will load data starting at address 0 and work upwards to address 127.

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