pnch(FP) 6 January 1993 pnch(FP) Name pnch - file format for card images Description The PNCH format is a convenient representation for files consisting of card images in an arbitrary code. A PNCH file is a simple concatenation of card records. A card record consists of a single control byte followed by a variable number of data bytes. The control byte specifies the number (which must lie in the range 0 to 80) of data bytes that follow. The data bytes are 8-bit codes that constitute the card image. If there are fewer than 80 data bytes, it is understood that the remainder of the card image consists of trail- ing blanks.