diff --git a/bin/wsim b/bin/wsim
index fc0755164..9c4cce68f 100755
--- a/bin/wsim
+++ b/bin/wsim
@@ -57,9 +57,12 @@ if (args.sim == "questa"):
             args.args = " -GTEST=\"" + args.testsuite + "\" " + args.args
     cmd = "do wally.do " + args.config + " " + args.testsuite + " " + args.tb + " " + args.args
     if (args.coverage):
-        cmd += " -coverage"
+        cmd += " --coverage"
     if (args.gui):  # launch Questa with GUI; add +acc to keep variables accessible
-         cmd = cd + "; vsim -do \"" + cmd + " +acc -GDEBUG=1\""        
+        if(args.tb == "testbench"): 
+            cmd = cd + "; vsim -do \"" + cmd + " +acc -GDEBUG=1\""
+        elif(args.tb == "testbench_fp"):
+            cmd = cd + "; vsim -do \"" + cmd + " +acc\""
     else: # launch Questa in batch mode
         cmd = cd + "; vsim -c -do \"" + cmd + "\""
     print("Running Questa with command: " + cmd)
diff --git a/sim/questa/imperas.ic b/sim/questa/imperas.ic
new file mode 100644
index 000000000..51344b75a
--- /dev/null
+++ b/sim/questa/imperas.ic
@@ -0,0 +1,115 @@
+#--mpdconsole
+#--gdbconsole
+#--showoverrides
+#--showcommands
+
+# Core settings
+--override cpu/priv_version=1.12 
+--override cpu/user_version=20191213
+# arch
+--override cpu/mimpid=0x100
+--override cpu/mvendorid=0x602
+--override cpu/marchid=0x24
+--override refRoot/cpu/tvec_align=64
+--override refRoot/cpu/envcfg_mask=1   # dh 1/26/24 this should be deleted when ImperasDV is updated to allow envcfg.FIOM to be written
+
+# bit manipulation
+--override cpu/add_Extensions=B 
+#--override cpu/add_implicit_Extensions=B 
+--override cpu/bitmanip_version=1.0.0
+
+# More extensions
+--override cpu/Zcb=T
+--override cpu/Zicond=T
+--override cpu/Zfh=T
+--override cpu/Zfa=T
+
+# Cache block operations
+--override cpu/Zicbom=T
+--override cpu/Zicbop=T
+--override cpu/Zicboz=T
+--override cmomp_bytes=64  # Zic64b
+--override cmoz_bytes=64   # Zic64b
+--override lr_sc_grain=8   # Za64rs requires <=64; we use native word size
+
+# 64 KiB continuous huge pages supported
+--override cpu/Svpbmt=T
+--override cpu/Svnapot_page_mask=65536
+
+# SV39 and SV48 supported
+--override cpu/Sv_modes=768
+
+--override cpu/Svinval=T
+
+
+#  clarify
+#--override refRoot/cpu/mtvec_sext=F
+
+--override cpu/tval_ii_code=T
+
+#--override cpu/time_undefined=T
+#--override cpu/cycle_undefined=T
+#--override cpu/instret_undefined=T
+#--override cpu/hpmcounter_undefined=T
+
+--override cpu/reset_address=0x80000000
+
+--override cpu/unaligned=T  # Zicclsm (should be true)
+--override cpu/ignore_non_leaf_DAU=1
+--override cpu/wfi_is_nop=T
+--override cpu/misa_Extensions_mask=0x0 # MISA not writable
+--override cpu/Sstc=T
+
+# unsuccessfully attempt to add B extension (DH 12/21/23)
+#--override cpu/add_Extensions="B"
+#--override cpu/misa_Extensions=0x0014112F
+
+# Enable SVADU hardware update of A/D bits when menvcfg.ADUE=1
+--override cpu/Svadu=T
+#--override cpu/updatePTEA=F
+#--override cpu/updatePTED=F
+
+
+# THIS NEEDS FIXING to 16
+--override cpu/PMP_registers=16
+--override cpu/PMP_undefined=T
+
+# PMA Settings 
+# 'r': read access allowed
+# 'w': write access allowed
+# 'x': execute access allowed
+# 'a': aligned access required
+# 'A': atomic instructions NOT allowed (actually USER1 privilege needed)
+# 'P': push/pop instructions NOT allowed (actually USER2 privilege needed)
+# '1': 1-byte accesses allowed
+# '2': 2-byte accesses allowed
+# '4': 4-byte accesses allowed
+# '8': 8-byte accesses allowed
+# '-', space: ignored (use for input string formatting).
+#
+# SVxx Memory 0x0000000000 0x7FFFFFFFFF
+#
+--callcommand refRoot/cpu/setPMA -lo 0x0000000000 -hi 0x7FFFFFFFFF -attributes " ---a-- ---- " # INITIAL
+--callcommand refRoot/cpu/setPMA -lo 0x0000001000 -hi 0x0000001FFF -attributes " r-x-A- 1248 " # BOOTROM
+--callcommand refRoot/cpu/setPMA -lo 0x0000012100 -hi 0x000001211F -attributes " rw-aA- --48 " # SDC
+--callcommand refRoot/cpu/setPMA -lo 0x0002000000 -hi 0x000200FFFF -attributes " rw-aA- 1248 " # CLINT
+--callcommand refRoot/cpu/setPMA -lo 0x000C000000 -hi 0x000FFFFFFF -attributes " rw-aA- --4- " # PLIC
+--callcommand refRoot/cpu/setPMA -lo 0x0010000000 -hi 0x0010000007 -attributes " rw-aA- 1--- " # UART0 error - 0x10000000 - 0x100000FF
+--callcommand refRoot/cpu/setPMA -lo 0x0010060000 -hi 0x00100600FF -attributes " rw-aA- --4- " # GPIO  error - 0x10069000 - 0x100600FF
+--callcommand refRoot/cpu/setPMA -lo 0x0010040000 -hi 0x0010040FFF -attributes " rw-aA- --4- " # SPI   error - 0x10040000 - 0x10040FFF
+#--callcommand refRoot/cpu/setPMA -lo 0x0080000000 -hi 0x008FFFFFFF -attributes " rwxaA- 1248 " # UNCORE_RAM
+--callcommand refRoot/cpu/setPMA -lo 0x0080000000 -hi 0x008FFFFFFF -attributes " rwx--- 1248 " # UNCORE_RAM
+
+# Enable the Imperas instruction coverage
+#-extlib    refRoot/cpu/cv=imperas.com/intercept/riscvInstructionCoverage/1.0
+#-override  refRoot/cpu/cv/cover=basic
+#-override  refRoot/cpu/cv/extensions=RV32I
+
+# Add Imperas simulator application instruction tracing
+--verbose
+#--trace --tracechange --traceshowicount --tracemode -tracemem ASX --monitornetschange --traceafter 300000000
+--override cpu/debugflags=6 --override cpu/verbose=1
+--override cpu/show_c_prefix=T
+
+# Store simulator output to logfile
+--output imperas.log
diff --git a/sim/questa/run-imperas-linux.sh b/sim/questa/run-imperas-linux.sh
index 7192adb81..d0f3981c4 100755
--- a/sim/questa/run-imperas-linux.sh
+++ b/sim/questa/run-imperas-linux.sh
@@ -7,4 +7,4 @@ export OTHERFLAGS="+TRACE2LOG_ENABLE=1 +TRACE2LOG_AFTER=100"
 #export OTHERFLAGS="+TRACE2LOG_ENABLE=1  +TRACE2LOG_AFTER=10500000"
 #export OTHERFLAGS=""
 
-vsim -c -do "do questa/wally-linux-imperas.do buildroot buildroot $::env(RISCV) 0 0 0"
+vsim -c -do "do wally.do buildroot buildroot testbench --lockstep"
diff --git a/sim/questa/wally-linux-imperas.do b/sim/questa/wally-linux-imperas.do
deleted file mode 100644
index 1165676a0..000000000
--- a/sim/questa/wally-linux-imperas.do
+++ /dev/null
@@ -1,84 +0,0 @@
-# wally.do 
-# SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
-#
-# Modification by Oklahoma State University & Harvey Mudd College
-# Use with Testbench 
-# James Stine, 2008; David Harris 2021
-# Go Cowboys!!!!!!
-#
-# Takes 1:10 to run RV64IC tests using gui
-
-# run with vsim -do "do wally-pipelined.do rv64ic riscvarchtest-64m"
-
-# Use this wally-pipelined.do file to run this example.
-# Either bring up ModelSim and type the following at the "ModelSim>" prompt:
-#     do wally.do
-# or, to run from a shell, type the following at the shell prompt:
-#     vsim -do wally.do -c
-# (omit the "-c" to see the GUI while running from the shell)
-
-onbreak {resume}
-
-# create library
-if [file exists work] {
-    vdel -all
-}
-vlib work
-
-# compile source files
-# suppress spurious warnngs about 
-# "Extra checking for conflicts with always_comb done at vopt time"
-# because vsim will run vopt
-
-# start and run simulation
-# remove +acc flag for faster sim during regressions if there is no need to access internal signals
-if {$2 eq "buildroot"} {
-    vlog -lint -work work_${1}_${2} \
-      +define+USE_IMPERAS_DV \
-      +incdir+../config/deriv/$1 \
-      +incdir+../config/shared \
-      +incdir+$env(IMPERAS_HOME)/ImpPublic/include/host \
-      +incdir+$env(IMPERAS_HOME)/ImpProprietary/include/host \
-      $env(IMPERAS_HOME)/ImpPublic/source/host/rvvi/rvviApiPkg.sv    \
-      $env(IMPERAS_HOME)/ImpPublic/source/host/rvvi/rvviTrace.sv      \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/idvApiPkg.sv  \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/idvPkg.sv   \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/idvApiPkg.sv \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/trace2api.sv  \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/trace2log.sv  \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/trace2cov.sv  \
-      $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/trace2bin.sv  \
-      ../src/cvw.sv \
-       ../testbench/testbench.sv \
-       ../testbench/common/*.sv ../src/*/*.sv \
-       ../src/*/*/*.sv -suppress 2583
-
-    #
-    # start and run simulation
-    # for profiling add
-    # vopt -fprofile
-    # vsim -fprofile+perf
-    # visualizer -fprofile+perf+dir=fprofile
-    #
-    eval vopt +acc work_${1}_${2}.testbench -work work_${1}_${2} -G RISCV_DIR=$3 \
-         -G TEST=$2 -o testbenchopt 
-    eval vsim -lib work_${1}_${2} testbenchopt -suppress 8852,12070,3084,3829,13286  -fatal 7 \
-        -sv_lib $env(IMPERAS_HOME)/lib/Linux64/ImperasLib/imperas.com/verification/riscv/1.0/model \
-        $env(OTHERFLAGS)
-
-    #-- Run the Simulation
-    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
-    echo "Don't forget to change DEBUG_LEVEL = 0."
-    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
-    #run 100 ns
-    #force -deposit testbench/dut/core/priv/priv/csr/csri/IE_REGW 16'h2aa
-    #force -deposit testbench/dut/uncore/uncore/clint/clint/MTIMECMP 64'h1000
-    run 9800 ms
-    add log -recursive /testbench/dut/*
-    do wave.do
-    run 200 ms
-    #run -all
-
-    exec ./slack-notifier/slack-notifier.py
-
-}
diff --git a/sim/questa/wally.do b/sim/questa/wally.do
index 8a21282ce..0e717f730 100644
--- a/sim/questa/wally.do
+++ b/sim/questa/wally.do
@@ -18,6 +18,8 @@
 #     vsim -do wally-batch.do -c
 # (omit the "-c" to see the GUI while running from the shell)
 
+set DEBUG 1
+
 onbreak {resume}
 onerror {quit -f}
 
@@ -42,6 +44,22 @@ set coverage 0
 set CoverageVoptArg ""
 set CoverageVsimArg ""
 
+set lockstep 0
+# ok this is annoying. vlog, vopt, and vsim are very picky about how arguments are passed.
+# unforunately it won't allow these to be grouped as one argument per command so they are broken
+# apart. 
+set lockstepvoptstring ""
+set SVLib ""
+set SVLibPath ""
+set OtherFlags ""
+set ImperasPubInc ""
+set ImperasPrivInc ""
+set rvviFiles ""
+set idvFiles ""
+
+set GUI 0
+set accFlag ""
+
 # Need to be able to pass arguments to vopt.  Unforunately argv does not work because
 # it takes on different values if vsim and the do file are called from the command line or
 # if the do file isd called from questa sim directly.  This chunk of code uses the $4 through $n
@@ -50,10 +68,9 @@ set tbArgs ""
 set from 4
 set step 1
 set lst {}
-set GUI 0
+
 set PlusArgs {}
 set ParamArgs {}
-set accFlag ""
 for {set i 0} true {incr i} {
     set x [expr {$i*$step + $from}]
     if {$x > $argc} break
@@ -61,66 +78,74 @@ for {set i 0} true {incr i} {
     lappend lst $arg
 }
 
-if {$argc >= 3} {
-    echo "got at least 3 args"
-    set AccPosition [lsearch $lst "+acc"]
-    echo $AccPosition
-    if {$AccPosition != -1} {
-        set GUI 1
-        set accFlag "+acc"
-        set tbArgs [lreplace $lst $AccPosition $AccPosition]
-    } else {
-        set tbArgs $lst
-    }
-    set tbArgsLst [split $tbArgs " "]
+echo "number of args = $argc"
+echo "lst = $lst"
 
-    set index [lsearch -exact $tbArgsLst "-coverage"]
-    if {$index >= 0} {
-        set coverage 1
-        set CoverageVoptArg "+cover=sbecf"
-        set CoverageVsimArg "-coverage"
-        echo $tbArgsLst
-        set tbArgsLst [lreplace $tbArgsLst $index $index ]
-        #echo "help help help !!!!!!!!!!!!!!!!!!!!!!!!!!!"
-        #echo $tbArgsLst
-        #echo "help help help !!!!!!!!!!!!!!!!!!!!!!!!!!!"
-    }
-    
-    # separate the +args from the -G parameters
-    foreach otherArg $tbArgsLst {
-        if {[string index $otherArg 0] eq "+"} {
-            lappend PlusArgs $otherArg
-        } else {
-            lappend ParamArgs $otherArg
-        }
+# if +acc found set flag and remove from list
+set AccIndex [lsearch -exact $lst "+acc"]
+if {$AccIndex >= 0} {
+    set GUI 1
+    set accFlag "+acc"
+    set lst [lreplace $lst $AccIndex $AccIndex]
+}
+
+# if +coverage found set flag and remove from list
+set CoverageIndex [lsearch -exact $lst "--coverage"]
+if {$CoverageIndex >= 0} {
+    set coverage 1
+    set CoverageVoptArg "+cover=sbecf"
+    set CoverageVsimArg "-coverage"
+    set lst [lreplace $lst $CoverageIndex $CoverageIndex]
+}
+
+set LockStepIndex [lsearch -exact $lst "--lockstep"]
+if {$LockStepIndex >= 0} {
+    set lockstep 1
+
+    # ideally this would all be one or two variables, but questa is having a real hard time
+    # with this.  For now they have to be separate.
+    set lockstepvoptstring "+define+USE_IMPERAS_DV"
+    set ImperasPubInc +incdir+$env(IMPERAS_HOME)/ImpPublic/include/host
+    set ImperasPrivInc +incdir+$env(IMPERAS_HOME)/ImpProprietary/include/host
+    set rvviFiles       $env(IMPERAS_HOME)/ImpPublic/source/host/rvvi/*.sv
+    set idvFiles $env(IMPERAS_HOME)/ImpProprietary/source/host/idv/*.sv
+    set SVLib "-sv_lib"
+    set SVLibPath $env(IMPERAS_HOME)/lib/Linux64/ImperasLib/imperas.com/verification/riscv/1.0/model
+    set OtherFlags $env(OTHERFLAGS)
+
+    set lst [lreplace $lst $LockStepIndex $LockStepIndex]
+}
+
+# separate the +args from the -G parameters
+foreach otherArg $lst {
+    if {[string index $otherArg 0] eq "+"} {
+        lappend PlusArgs $otherArg
+    } else {
+        lappend ParamArgs $otherArg
     }
 }
-# helpful debug code remove later
-#echo "help me!!!!!!! GUI ="
-#echo $GUI
-#echo "help me!!!!!!! lst ="
-#echo $lst
-#echo "help me!!!!!!! = accFlag ="
-#echo $accFlag
-#echo "help me!!!!!!! PlusArgs ="
-#echo $PlusArgs
-#echo "help me!!!!!!! ParamArgs ="
-#echo $ParamArgs
-#echo "help me!!!!!!!"
+
+if {$DEBUG > 0} {
+    echo "GUI = $GUI"
+    echo "coverage = $coverage"
+    echo "lockstep = $lockstep"
+    echo "remaining list = \'$lst\'"
+    echo "Extra +args = \'$PlusArgs\'"
+    echo "Extra -args = \'$ParamArgs\'"
+}
 
 # compile source files
 # suppress spurious warnngs about 
 # "Extra checking for conflicts with always_comb done at vopt time"
 # because vsim will run vopt
 
-vlog -lint -work ${WKDIR} +incdir+${CONFIG}/${CFG} +incdir+${CONFIG}/deriv/${CFG} +incdir+${CONFIG}/shared ${SRC}/cvw.sv ${TB}/${TESTBENCH}.sv ${TB}/common/*.sv  ${SRC}/*/*.sv ${SRC}/*/*/*.sv -suppress 2583 -suppress 7063,2596,13286
+vlog -lint -work ${WKDIR}  +incdir+${CONFIG}/${CFG} +incdir+${CONFIG}/deriv/${CFG} ${lockstepvoptstring} ${ImperasPubInc} ${ImperasPrivInc} +incdir+${CONFIG}/shared ${rvviFiles} ${idvFiles} ${SRC}/cvw.sv ${TB}/${TESTBENCH}.sv ${TB}/common/*.sv  ${SRC}/*/*.sv ${SRC}/*/*/*.sv -suppress 2583 -suppress 7063,2596,13286
 
 # start and run simulation
 # remove +acc flag for faster sim during regressions if there is no need to access internal signals
-vopt $accFlag wkdir/${CFG}_${TESTSUITE}.${TESTBENCH} -work ${WKDIR} ${tbArgsLst} -o testbenchopt ${CoverageVoptArg}
+vopt $accFlag wkdir/${CFG}_${TESTSUITE}.${TESTBENCH} -work ${WKDIR} ${lst} -o testbenchopt ${CoverageVoptArg}
 
-#  *** tbArgs producees a warning that TEST not found in design when running sim-testfloat-batch.  Need to separate -G and + arguments to pass separately to vopt and vsim
-vsim -lib ${WKDIR} testbenchopt +TEST=${TESTSUITE} ${PlusArgs} -fatal 7 -suppress 3829 ${CoverageVsimArg} 
+vsim -lib ${WKDIR} testbenchopt +TEST=${TESTSUITE} ${PlusArgs} -fatal 7 ${SVLib} ${SVLibPath} ${OtherFlags} -suppress 3829 ${CoverageVsimArg}
 
 #    vsim -lib wkdir/work_${1}_${2} testbenchopt  -fatal 7 -suppress 3829
 # power add generates the logging necessary for said generation.
@@ -137,7 +162,6 @@ if { ${GUI} } {
 run -all
 # power off -r /dut/core/*
 
-
 if {$coverage} {
     set UCDB cov/${CFG}_${TESTSUITE}.ucdb
     echo "Saving coverage to ${UCDB}"