57 lines
1.7 KiB
PHP
57 lines
1.7 KiB
PHP
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; SCCSID = @(#)pdb.asm 1.1 85/04/10
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BREAK <Process data block>
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;** Process data block (otherwise known as program header)
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;
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; These offset are documented in the MSDOS Encyclopedia, so nothing
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; can be rearranged here, ever. Reserved areas are probably safe
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; for use.
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FilPerProc EQU 20
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Process_data_block STRUC
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PDB_Exit_Call DW ? ; INT int_abort system terminate
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PDB_block_len DW ? ; size of execution block
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DB ?
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PDB_CPM_Call DB 5 DUP (?) ; ancient call to system
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PDB_Exit DD ? ; pointer to exit routine
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PDB_Ctrl_C DD ? ; pointer to ^C routine
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PDB_Fatal_abort DD ? ; pointer to fatal error
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PDB_Parent_PID DW ? ; PID of parent (terminate PID)
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PDB_JFN_Table DB FilPerProc DUP (?)
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PDB_environ DW ? ; seg addr of environment
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PDB_User_stack DD ? ; stack of self during system calls
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PDB_JFN_Length DW ? ; number of handles allowed
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PDB_JFN_Pointer DD ? ; pointer to JFN table
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PDB_Next_PDB DD ? ; pointer to nested PDB's
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PDB_InterCon DB ? ; *** jh-3/28/90 ***
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PDB_Append DB ? ; *** Not sure if still used ***
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PDB_Novell_Used DB 2 DUP (?) ; Novell shell (redir) uses these
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PDB_Version DW ? ; DOS version reported to this app
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PDB_PAD1 DB 0Eh DUP (?)
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PDB_Call_system DB 5 DUP (?) ; portable method of system call
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PDB_PAD2 DB 7h DUP (?) ; reserved so FCB 1 can be used as
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; an extended FCB
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PDB_FCB1 DB 10h dup (?) ; default FCB 1
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PDB_FCB2 DB 10h dup (?) ; default FCB 2
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PDB_PAD3 DB 4 dup (?) ; not sure if this is used by PDB_FCB2
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PDB_TAIL DB 128 dup (?) ; command tail and default DTA
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Process_data_block ENDS
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;
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;PDB_Append equ BYTE PTR PDB_PAD1 + 1 ; reincluded because APPEND
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; ; wouldn't build w/o it. feb 1990, leaf
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;
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;PDB_InterCon EQU BYTE PTR PDB_PAD1 ; 2/12/KK
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;
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