.TH SWAB 3C .SH NAME swab \- swap bytes .SH SYNOPSIS .B swab (from, to, nbytes) .br .B char \(**from, \(**to; .br .B int nbytes; .SH DESCRIPTION .I Swab\^ copies .I nbytes\^ bytes pointed to by .I from\^ to the position pointed to by .IR to , exchanging adjacent even and odd bytes. It is useful for carrying binary data between .SM PDP\*S-11s and other machines. .I Nbytes\^ should be even.