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* NAME: LDR-APM DOC. 70180005000 REV. E PAGE 16

0724 * N=NO. OF 16-BIT WORDS IN THIS BLOCK (INCLUDING CHECKSUM) 0725 * A=ADDRESS WHERE THE FIRST DATA WORD IN THIS BLOCK IS TO 0726 * BE STORED. ALL OTHER DATA WORDS ARE STORED 0727 * SEQUENTIALLY. 0728 * 1=FIRST DATA WORD 0729 * 2...K=OTHER DATA WORDS 0730 * Z=16-BIT CHECKSUM 0731 * 0732 * EACH DATA WORD IS 24 BITS LONG AND HAS ONE OF THE 0733 * FOLLOWING FORMATS..... 0734 * 0735 * GGGGGGGGGGGGGGGG00000000 0736 * OR 0737 * FTIIIIAAAAAAAAAAAAAA0D01 0738 * OR 0739 * FTIIIIBBBBBBBBBBBBBB0D10 0740 * OR 0741 * FTIIIICCCCCCCCCCCCCC0D11 0742 * OR 0743 * 111111VVVVVVVVVVVVVV0100 0744 * OR 0745 * OOOOEEEEEEEEEEEEEEEE1000 0746 * 0747 * G=UNMODIFIED DATA OR GENERIC INSTRUCTION 0748 * F=INDIRECT FLAG 0749 * T=INDEX TAG 0750 * I=INSTRUCTION CODE 0751 * A=INSTRUCTION'S ABSOLUTE ADDRESS 0752 * B=INSTRUCTION'S RELATIVE ADDRESS 0753 * C=INSTRUCTION'S COMPLEMENTED RELATIVE ADDRESS 0754 * D=0=9-BIT ADDRESS. 0755 * D=1=14-BIT ADDRESS (DAC). 0756 * E=16 BIT VALUE TO WHICH THE RELOCATION IS TO BE ADDED 0757 * V=RELATIVE ADDRESS OF THE LAST OF A STRING OF INSTRUCTIONS 0758 * WHICH ARE TO HAVE THE CURRENT LOCATION FILLED IN AS 0759 * THEIR ADDRESSES. THE STRING MAY CONTAIN DACS (WHICH 0760 * ARE TO ACCEPT A FULL 14-BIT ADDRESS), WHICH ARE 0761 * DISTINGUISHED FROM NINE-BITS BY HAVING AN OPERATION- 0762 * CODE OF ZERO. THE DACS IN THE STRING MUST BE STRUNG 0763 * IN THE SAME MANNER AS NINE-BITS. NO INSTRUCTION 0764 * IN A STRING MAY HAVE BEEN DESECTORED INTO A BASE SECTOR 0765 * OTHER THAN THE BASE SECTOR IN EFFECT AT THE TIME THE 0766 * STRING VALUE IS DEFINED. NO ERROR INDICATION CAN BE 0767 * GIVEN IF THIS RESTRICTION IS VIOLATED AND THE RESULTS 0768 * ARE UNPREDICTABLE. SINCE THE DDP-116 FORTRAN IV 0769 * COMPILER DOES NOT EMIT 'SETB' BLOCKS, THIS NEED NOT 0770 * NORMALLY BE OF CONCERN. 0771 * 0772 * THE LOADER WILL REDUCE ADDRESS TYPES A,B, OR C TO THE 0773 * PROPER 9 BIT FORM (EXCEPT FOR DAC) MAKING ANY NECESSARY