.\" a test macro package
.\"
.\" .pp a simple paragraph part
.de pp
.sp
.ti +5
..
.\" .tl do titles
.de Tl
.\" .eh /%  CC310 USER MANUAL//CHAPTER \\$1/
.\" .oh /CHAPTER \\$1//\\$2  %/
.\" .fo //BY PHIL/
.nr CH \\$1
.ds CT "\\$2
..
.\" set some things for the current file
.fl 0
.hl 0
.pl 30
.rm 55
.Tl 4 "C SOURCE FILES"
.wh 0 HD
.wh -0.5i FT
.de HD
.if o .tl /CHAPTER \\n(CH//\\*(CT  %/
.if e .tl /%  CC310 USER MANUAL//CHAPTER \\n(CH/
'sp |(2i/6u)
.\".ns
..
.de FT

.tl //BY PHIL/
'sp 1i \" force to bottom of page
.\".ns
..
.de oo
.br
.ti -60
OPTION
.br
.ti +5
\\$1
.if \\n$>1 \{\
.br
or
.ti +5
\\$1\\$2
.sp 1\}
.br
Where,
..