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! COPYRIGHT (c) 1980, 1981, 1982
! DIGITAL EQUIPMENT CORPORATION
! Maynard, Massachusetts
! This software is furnished under a license and may be used
! and copied only in accordance with the terms of such license
! and with the inclusion of the above copyright notice. This
! software or any other copies thereof may not be provided or
! otherwise made available to any other person. No title to
! and ownership of the software is hereby transferred.
! The information in this software is subject to change
! without notice and should not be construed as a commitment
! by DIGITAL EQUIPMENT CORPORATION.
! DIGITAL assumes no responsibility for the use or reliability
! of its software on equipment which is not supplied by
! DEFINE THE STORAGE BLOCK USED TO DESCRIBE A CHAIN OF OTHER BLOCKS
! DEFINE MAX POINTERS ALLOWED BEFORE GOING TO ANOTHER BLOCK
MAX_CHAIN_PTRS = 15;
SBLOCK (CHAIN, 2) !CHAIN BLOCKS - USED TO LINK THINGS
HEADER (CHAIN) !
ABLOCK (NUM_CHAIN_PTRS, %NBITSU (MAX_CHAIN_PTRS), 1) !CURRENT NUMBER OF CHAIN POINTERS
ABLOCK (CHAIN_STYPE, %NBITSU (MAX_BLK_TYPE), 1) !TYPE OF BLOCK POINTED TO
ABLOCK (CHAIN_BACK, %BPADDR, 1) !POINTER TO ROOT BLOCK
ABLOCK (CHAIN_NEXT, %BPADDR, 1) !NEXT CHAIN BLOCK, FOR MORE POINTERS
ABLOCK (CHAIN_PREV, %BPADDR, 1) !PREVIOUS CHAIN BLOCK
ABLOCK (CHAIN_PTRS, %BPADDR*MAX_CHAIN_PTRS, 1) !THE POINTERS THEMSELVES
EBLOCK (CHAIN) !