LP-IOL

* ????-???-???? (LP-IOL) DRAWING NO. 41285997-001-01 PAGE 2

0051 * 0052 * RESTRICTIONS 0053 * 0054 * THIS LIBRARY WILL WORK ON AN H316 OR DDP-516 COMPUTER WITH A 0055 * LINE PRINTER. THE EXACT OPTION NUMBER OF THIS LINE PRINTER IS 0056 * UNKNOWN. IT IS, HOWEVER, NOT THE LINE PRINTER OPTION DOCUMENTED 0057 * IN THE DDP-516 PROGRAMMERS REFERENCE MANUAL. 0058 * 0059 * THAT OPTION (516-7050) HAS NO CHARACTER BASED STORAGE IN THE LINE 0060 * PRINTER CONTROL UNIT AND, AS A CONSEQUENCE, A ONE-BIT VALUE MUST 0061 * BE OUTPUT FOR EACH CHARACTER POSITION INDICATING WHETHER THE PRINT 0062 * HAMMER SHOULD FIRE FOR EACH CHARACTER POSITION AROUND THE ROTATING 0063 * DRUM. IN ADDITION THE DRUM ONLY INCLUDES 60 CHARACTER POSITIONS 0064 * AND THE PAPER IS EXPLICTLY SHUTTLED LEFT AND RIGHT, UNDER PROGRAM 0065 * CONTROL, TO PRINT THE ODD AND EVEN CHARATER POSITIONS ALONG THE 0066 * LINE. 0067 * 0068 * IN CONTRAST, THE LINE PRINTER OPTION THAT THIS LIBRARY DRIVES HAS 0069 * STORAGE, IN THE LINE PRINTER CONTROLLER, FOR 120 CHARACTERS AND 0070 * THE PROGRAM MUST SIMPLY OUTPUT 60 WORDS, EACH HOLDING TWO 0071 * CHARACTERS, TO THE CONTROLLER FOR EACH LINE TO BE PRINTED. 0072 * SINCE NO MANUAL IS AVAILABLE FOR THIS OPTION, THE BEHAVIOUR OF 0073 * THE VARIOUS OCP, SKS, AND OTA COMMANDS HAS BEEN DEDUCED FROM THE 0074 * OPERATION OF THIS LIBRARY. THIS SOURCE CODE WAS RECOVERED BY 0075 * DISASSEMBLING THE CODE INCLUDED IN THE SELF LOADING SYSTEM TAPE 0076 * FOR DAP-16M2 USED ON A DDP-516 INSTALLATION. 0077 * 0078 * THE LINEPRINTER OPTION THAT THIS SOFTWARE DRIVES MAY WELL BE THE 0079 * "LINE PRINTER OPTION 316/516-670X" AS MENTIONED IN THE 0080 * "NEW AND UPDATED STANDARD SOFTWARE" NOTE OF JUNE 1971 0081 * 0082 * STORAGE 0083 * 0084 * SEE CONTENTS 0085 * 0086 * 0087 * CONTENTS 0088 * 0089 * MODULE STORAGE PAGE 0090 * NAME DEFINITION OCT DEC NO. 0091 * 0092 * O$LH LINE PRINTER HEADER INITIALIZE 0093 * O$LA LINE PRINTER LIST A LINE 0094 * O$LE LINE PRINTER EJECT 0095 * O$LLHB LINE PRINTER LIST HEADING BUFFER 0096 * O$LLHW LINE PRINTER LIST HEADING BUFFER NO. OF WORDS 0097 * O$LLPN LINE PRINTER LIST PAGE NUMBER 0098 * O$LLLC LINE PRINTER LIST LINE COUNT/PAGE 407 263 0099 * 0100 *