/* BEGIN INCLUDE FILE...disk_pack.incl.pl1 Last Modified January 1982 for new volume map */ /****^ HISTORY COMMENTS: 1) change(86-01-14,Fawcett), approve(86-05-13,MCR7383), audit(86-05-14,LJAdams), install(86-07-18,MR12.0-1098): Add vars PAGE_SIZE and VTOCE_SIZE, Also change the SECTORS_PER_VTOCE and VTOCES_PER_RECORD form fixed bin constants to arrays of fixed bin constants indexed by device type as defined in fs_dev_types.incl.pl1. This was done for support of the 3380, and 3390 devices for 512_WORD_IO. 2) change(86-10-21,Fawcett), approve(86-10-21,MCR7533), audit(86-10-21,Farley), install(86-10-22,MR12.0-1193): Change PAGE_SIZE and VTOCE_SIZE from automatic to static constants. END HISTORY COMMENTS */ /* All disk packs have the standard layout described below: Record 0 : contains the label, as declared in fs_vol_label.incl.pl1. Record 1 to 3 : contains the volume map, as declared in vol_map.incl.pl1 Record 4 to 5 : contains the dumper bit map, as declared in dumper_bit_map.incl.pl1 Record 6 : contains the vtoc map, as declared in vtoc_map.incl.pl1 Record 7 : formerly contained bad track list; no longer used. Records 8 to n-1 : contain the array of vtoc entries; ( n is specified in the label) each record contains 5 192-word vtoc entries. The last 64 words are unused. Records n to N-1 : contain the pages of the Multics segments. ( N is specified in the label) Sundry partitions may exist within the region n to N-1, withdrawn or not as befits the meaning of the particular partition. A conceptual declaration for a disk pack could be: dcl 1 disk_pack, 2 label_record (0 : 0) bit(36 * 1024), 2 volume_map_record (1 : 3) bit(36 * 1024), 2 dumper_bit_map_record (4 : 5) bit(36 * 1024), 2 vtoc_map_record (6 : 6) bit(36 * 1024), 2 spare_record (7 : 7) bit(36 * 1024), 2 vtoc_array_records (8 : n-1), 3 vtoc_entry ( 5 ) bit(36 * 192), 3 unused bit(36 * 64), 2 Multics_pages_records (n : N-1) bit(36 * 1024); */ dcl (LABEL_ADDR init (0), /* Address of Volume Label */ VOLMAP_ADDR init (1), /* Address of first Volume Map record */ DUMPER_BIT_MAP_ADDR init (4), /* For initial release compaitiblity */ VTOC_MAP_ADDR init (6), /* Address of first VTOC Map Record */ VTOC_ORIGIN init (8), /* Address of first record of VTOC */ DEFAULT_HCPART_SIZE init (1000), /* Size of Hardcore Partition */ MAX_VTOCE_PER_PACK init (31774)) /* Limited by size of VTOC Map */ fixed bin (17) int static options (constant); /* SECTORS_PER_VTOCE & VTOCES_PER_RECORD are indexed via device type as */ /* defined by fs_dev_types and extracted form the disk_table entry (dte) */ /* or the physical volume table entry (pvte) device type. */ dcl PAGE_SIZE fixed bin (17) init (1024) static options (constant); dcl VTOCE_SIZE fixed bin (17) init (192) static options (constant); dcl SECTORS_PER_VTOCE (9) fixed bin static options (constant) init (0, 3, 3, 3, 3, 3, 3, 1, 1); dcl VTOCES_PER_RECORD (9) fixed bin static options (constant) init (0, 5, 5, 5, 5, 5, 5, 2, 2); dcl SECTORS_PER_RECORD (9) fixed bin static options (constant) init (0, 16, 16, 16, 16, 16, 16, 2, 2); /* END INCLUDE FILE...disk_pack.incl.pl1 */ */ ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group Bull including Bull HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell Bull Inc., Groupe Bull and Bull HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, Bull or Bull HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by Bull HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved */