--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/defs/pipe.d	Fri Feb 01 19:26:44 2013 -0600
@@ -0,0 +1,96 @@
+               IFNE      PIPE.D-1
+
+PIPE.D         SET       1
+
+********************************************************************
+* PipeDefs - Pipe File Manager Definitions
+*
+* $Id$
+*
+* Edt/Rev  YYYY/MM/DD  Modified by
+* Comment
+* ------------------------------------------------------------------
+*          1988/12/03  Chris J. Burke
+* Coded from new PIPEMAN comments.
+
+               NAM       PipeDefs
+               TTL       Pipe File Manager Definitions
+
+*
+*   IOMan equates duplicated for PipeMan use
+*
+
+NPATHS         SET       16                  ;Maximum local paths per task -- must match IOMan
+NameMax        SET       29                  ;Maximum length of a file name
+
+*
+*   Device Driver Static Storage Layout
+*
+               ORG       V.User
+V.List         RMB       2                   ;Pointer to 1st pipe's pipe buffer
+PManMem        EQU       .                   ;Device driver memory (drive table equivalent)
+
+*
+*   Pipe Buffer Data Structure
+*
+               ORG       0
+PP.PD          RMB       2                   ;Pointer to shared path descriptor
+PP.Next        RMB       2                   ;Pointer to next pipe buffer in system map
+PP.Prev        RMB       2                   ;Pointer to previous pipe buffer in system map
+PP.Rsrv        RMB       2                   ;Reserved
+PP.Data        EQU       .                   ;Data buffer begins at this offset
+
+*
+*   Unique Path Descriptor Variables
+*
+               ORG       PD.FST
+*** PP.Read must have bit 4 clear; PP.Writ must be PP.Read XOR 4
+PD.Read        EQU       .
+PD.RPID        RMB       1                   ;Process ID of reader waiting on signal
+PD.RCT         RMB       1                   ;Number of blocked readers
+PD.RSIG        RMB       1                   ;Signal to send reader
+PD.REOR        RMB       1                   ;Read EOR character
+PD.Writ        EQU       .
+PD.WPID        RMB       1                   ;Process ID of writer waiting on signal
+PD.WCT         RMB       1                   ;Number of blocked writers
+PD.WSIG        RMB       1                   ;Signal to send writer
+PD.WEOR        RMB       1                   ;Write EOR character (dummy)
+*** End of special section
+PD.End         RMB       2                   ;Pointer to end of pipe buffer
+PD.NxtI        RMB       2                   ;Next in pointer
+PD.NxtO        RMB       2                   ;Next out pointer
+PD.RFlg        RMB       1                   ;"Ready" flag
+PD.Wrtn        RMB       1                   ;"Written" flag
+PD.BCnt        RMB       2                   ;# queue elements currently bufered
+PD.Own         RMB       1                   ;Process ID of pipe original creator
+PD.Keep        RMB       1                   ;Non-zero if pipe has been kept open artificailly
+PD.QSiz        RMB       2                   ;Max. elements in queue (copied from OPT section)
+
+*
+*   Path descriptor option section
+*
+*   Note that PD.Name overlaps with the last byte of PD.ECnt.
+*   PD.ECnt is copied to PD.QSiz as part of OPEN or CREATE,
+*   to make room for the pipe name.
+*
+               ORG       (PD.OPT+1)
+PD.ESiz        RMB       1                   ;Size of each queue element
+PD.ECnt        RMB       2                   ;Max. elements in queue (initial position)
+               IFGT      Level-1
+               ORG       (PD.OPT+3)
+PD.Name        RMB       NameMax
+               ENDC      
+
+*
+*   Device Descriptor definitions
+*
+IT.PDC         EQU       $12                 ;Pipe device class (like IT.DTP, IT.DVC)
+               ORG       IT.PDC
+               RMB       1                   ;Leave room for device class
+IT.ESiz        RMB       1                   ;Size of each queue element
+IT.ECnt        RMB       2                   ;Max. elements in queue (initial position)
+
+*   End of pipedefs
+
+               ENDC      
+