@echo off

if not exist dd.exe (
echo "WHERE IS dd.exe?"
exit -1
)
if "%~nx1"=="" ( goto D2I ) else ( goto I2D ) 

:D2I
echo [DISK to IMAGE mode]
set /P IN_DRV="Input Drive? [a]: "
set /P OUT_FILE="Output File? [_out.img]: "
if not defined IN_DRV set IN_DRV="a"
if not defined OUT_FILE set OUT_FILE="_out.img"
dd.exe if=\\.\%IN_DRV%: of=%OUT_FILE% bs=18k --progress
exit 0

:I2D
echo [IMAGE to DISK mode]
echo Input File   : %1
set /P OUT_DRV="Output Drive? [a]: "
if not defined OUT_DRV set OUT_DRV="a"
dd.exe if=%1 of=\\.\%OUT_DRV%: bs=18k --progress
pause
exit 0