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annotate defs/pipe.d @ 3239:a47ee8f14eb8

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Added new routine to dwread.asm and dwwrite.asm for using the SY6551 chips. Added new option to the becker port routines so the base address can be changed during build time from makefile. This should allow for setting building a optional module for use with the ESP8266-01 WiFi module on Ed Snider's analog board that is used with the CoCo3FPGA Project.
author David Ladd <drencor-xeen@users.sourceforge.net>
date Thu, 08 Mar 2018 21:36:34 -0600
parents db97356e3648
children
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1 IFNE PIPE.D-1
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3 PIPE.D SET 1
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5 ********************************************************************
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6 * PipeDefs - Pipe File Manager Definitions
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7 *
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8 * $Id$
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9 *
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10 * Edt/Rev YYYY/MM/DD Modified by
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11 * Comment
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12 * ------------------------------------------------------------------
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13 * 1988/12/03 Chris J. Burke
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14 * Coded from new PIPEMAN comments.
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16 NAM PipeDefs
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17 TTL Pipe File Manager Definitions
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18
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19 *
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20 * IOMan equates duplicated for PipeMan use
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21 *
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22
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23 NPATHS SET 16 ;Maximum local paths per task -- must match IOMan
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24 NameMax SET 29 ;Maximum length of a file name
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25
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26 *
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27 * Device Driver Static Storage Layout
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28 *
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29 ORG V.User
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30 V.List RMB 2 ;Pointer to 1st pipe's pipe buffer
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31 PManMem EQU . ;Device driver memory (drive table equivalent)
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32
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33 *
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34 * Pipe Buffer Data Structure
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35 *
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36 ORG 0
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37 PP.PD RMB 2 ;Pointer to shared path descriptor
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38 PP.Next RMB 2 ;Pointer to next pipe buffer in system map
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39 PP.Prev RMB 2 ;Pointer to previous pipe buffer in system map
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40 PP.Rsrv RMB 2 ;Reserved
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41 PP.Data EQU . ;Data buffer begins at this offset
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42
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43 *
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44 * Unique Path Descriptor Variables
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45 *
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46 ORG PD.FST
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47 *** PP.Read must have bit 4 clear; PP.Writ must be PP.Read XOR 4
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48 PD.Read EQU .
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49 PD.RPID RMB 1 ;Process ID of reader waiting on signal
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50 PD.RCT RMB 1 ;Number of blocked readers
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51 PD.RSIG RMB 1 ;Signal to send reader
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52 PD.REOR RMB 1 ;Read EOR character
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53 PD.Writ EQU .
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54 PD.WPID RMB 1 ;Process ID of writer waiting on signal
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55 PD.WCT RMB 1 ;Number of blocked writers
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56 PD.WSIG RMB 1 ;Signal to send writer
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57 PD.WEOR RMB 1 ;Write EOR character (dummy)
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58 *** End of special section
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59 PD.End RMB 2 ;Pointer to end of pipe buffer
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60 PD.NxtI RMB 2 ;Next in pointer
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61 PD.NxtO RMB 2 ;Next out pointer
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62 PD.RFlg RMB 1 ;"Ready" flag
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63 PD.Wrtn RMB 1 ;"Written" flag
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64 PD.BCnt RMB 2 ;# queue elements currently bufered
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65 PD.Own RMB 1 ;Process ID of pipe original creator
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66 PD.Keep RMB 1 ;Non-zero if pipe has been kept open artificailly
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67 PD.QSiz RMB 2 ;Max. elements in queue (copied from OPT section)
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68
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69 *
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70 * Path descriptor option section
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71 *
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72 * Note that PD.Name overlaps with the last byte of PD.ECnt.
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73 * PD.ECnt is copied to PD.QSiz as part of OPEN or CREATE,
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74 * to make room for the pipe name.
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75 *
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76 ORG (PD.OPT+1)
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77 PD.ESiz RMB 1 ;Size of each queue element
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78 PD.ECnt RMB 2 ;Max. elements in queue (initial position)
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79 IFGT Level-1
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80 ORG (PD.OPT+3)
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81 PD.Name RMB NameMax
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82 ENDC
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84 *
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85 * Device Descriptor definitions
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86 *
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87 IT.PDC EQU $12 ;Pipe device class (like IT.DTP, IT.DVC)
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88 ORG IT.PDC
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89 RMB 1 ;Leave room for device class
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90 IT.ESiz RMB 1 ;Size of each queue element
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91 IT.ECnt RMB 2 ;Max. elements in queue (initial position)
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93 * End of pipe.d
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94
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95 ENDC
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96