TUC: Protext 4.3 to Rich Text Format (RTF)
replace
$D,$8A,9
""
replace
$D,$8A
""
replace
9
"\tab "
replace
13,10
"\par "
replace
5,$90
""
toggle
$05,$E2
"\b "
"\b0 "
toggle 
$05,$E9
"\i "
"\i0 "
replace
$05,$E3
""
replace
$05,$EC
""
replace
$05,$F0
""
replace
$05,$F1
""
toggle
$05,$F5
"\ul "
"\ul0 "
toggle
5,$F4
"\up6 "
"\up0 "
toggle
5,$F3
"\dn6 "
"\up0 "
replace
5,$EE
""
replace
5,$E5
""
prefix
"{\rtf0\ansi "
suffix
"}"

