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annotate defs/rbfdefs @ 1868:cba8a54bc509

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Slowly but surely
author boisy
date Fri, 29 Jul 2005 19:40:14 +0000
parents 87865128c951
children 34868794d297
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1541
8d4b5ee1cee4 Fixed defsfiles to work with ASM
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1 IFNE RBFDEFS-1
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2
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3 RBFDEFS set 1
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4
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5 ********************************************************************
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6 * RBFDefs - Random Block File Manager Definitions
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7 *
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8 * $Id$
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9 *
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10 * RBF stands for 'Random Block Filemanager' and is a package of subroutines
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11 * that define the logical structure of a disk and allows access to the files
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12 * in that structure.
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13 *
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14 * The data structures in this file give RBF its 'personality' and are used
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15 * by RBF itself, as well as applications that will require disk I/O.
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16 *
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17 * Edt/Rev YYYY/MM/DD Modified by
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18 * Comment
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19 * ------------------------------------------------------------------
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20 * 1982/07/13 Robert F. Doggett
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21 * PD.Exten added to path descriptor and PE Entries defined.
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22 *
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23 * 1982/07/15 Robert F. Doggett
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24 * V.FileHd inserted in driver static storage.
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25 *
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26 * 1982/09/10 WGP
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27 * Level One/Level Two condionals added.
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28 *
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29 * 1982/09/17 WGP
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30 *
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31 * 1982/09/17 Robert F. Doggett
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32 * PD.SLE renamed to PD.Creat.
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33 *
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34 * 1982/09/17 Robert F. Doggett
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35 * V.DiskID, V.BMapSz, V.MapSct added for smart multi-sector bitmap searching.
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36 *
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37 * 1982/09/20 Robert F. Doggett
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38 * Reserved areas added in static storage.
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39
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40 * 1983/06/07 Robert F. Doggett
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41 * Added InDriver flag in PD.SMF.
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42 *
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43 * 1983/06/13 Robert F. Doggett
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44 * Added PE.Req tmp save for PE.Lock.
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45 *
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46 * 1983/08/08 Robert F. Doggett
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47 * Reserved PD.SToff for Japanese.
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48 *
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49 * 1983/11/19 Robert F. Doggett
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50 * Added V.ResBit in drive tables.
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51 *
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52 * 1983/12/12 Robert F. Doggett
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53 * Added PE.Prior to save process priority.
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54 *
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55 * 1983/12/13 Robert F. Doggett
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56 * Added BufBusy bit in state flag (PD.SMF).
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57 *
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58 * 1984/07/06 Mark G. Hawkins
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59 * Added Bit Definitions for DD.FMT.
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60 *
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61 * 1987/06/23 Kevin K. Darling
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62 * Updated with Dev Desc Info
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63 *
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64 * 2003/06/02 Boisy G. Pitre
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65 * Updated comments for clarity.
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383d5981c23f Updated for anticipation of 256-2048 byte sector support
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66 * Added TYP.256-TYP.2048 definitions for future expansion.
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67 *
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68 * 2004/04/14 Boisy G. Pitre
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69 * Added new entries to device descriptor as per OS-9 Level One V2.00.00
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70 * addendum. Pointed out by Rodney Hamilton.
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71 *
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72 * 2005/05/31 P.Harvey-Smith.
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73 * Added defines for bit 2 of IT.DNS, which the format command uses to
87865128c951 Added defines for bit 2 of IT.DNS, which is track 0 density flag for format
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74 * determine if a drive should have it's track 0 as single or double density
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75 *
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76
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77 nam RBFDefs
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78 ttl Random Block File Manager Definitions
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79
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81 pag
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82 *******************************
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83 * RBF Device Descriptor Offsets
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84 *
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85 * These definitions are for RBF device descriptors.
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86
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87 org M$DTyp
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88 rmb 1 Device type (DT.RBF)
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89 IT.DRV rmb 1 Drive number
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90 IT.STP rmb 1 Step rate
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91 IT.TYP rmb 1 Disk device type information
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92 IT.DNS rmb 1 Density capability
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93 IT.CYL rmb 2 Number of cylinders
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94 IT.SID rmb 1 Number of surfaces
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95 IT.VFY rmb 1 Verify disk writes (0 = verify, 1 = don't)
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96 IT.SCT rmb 2 Default sectors/track
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97 IT.T0S rmb 2 Default sectors/track for track 0 sector 0
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98 IT.ILV rmb 1 Sector interleave offset
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99 IT.SAS rmb 1 Segment allocation size
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100 * The following fields are from the OS-9 Level One V2.00.00 Addendum
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101 IT.TFM rmb 1 DMA Transfer Mode
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102 IT.Exten rmb 2 Path Extension (PE) for record locking
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103 IT.SToff rmb 1 Sector/Track offsets (for "foreign" disk formats)
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104 * The following fields are not copied to the path descriptor
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105 IT.WPC rmb 1 Write precomp cyl/4 (HD)
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106 IT.OFS rmb 2 Starting cylinder offset (HD)
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107 IT.RWC rmb 2 Reduced write current cylinder (HD)
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108
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109
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110 * IT.TYP Definitions
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111 *
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112 TYP.HARD equ %10000000 Hard disk
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113 TYP.FLP equ %00000000 Floppy disk
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114 TYP.NSF equ %01000000 Non-standard format
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115 TYP.SOF equ %00000000 Standard NitrOS-9 format
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116
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117 * IT.TYP bit definitions if bit 7 of IT.TYP is set (hard disk)
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118 TYPH.256 equ %00000000 256 byte sector media
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119 TYPH.512 equ %00000001 512 byte sector media
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120 TYPH.1024 equ %00000010 1024 byte sector media
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121 TYPH.2048 equ %00000011 2048 byte sector media
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122 TYPH.SSM equ %00000011 Sector size mask
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123 TYPH.DRSV equ %00001100 Driver-reserved bits
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124 TYPH.DSQ equ %00010000 Drive size query flag
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125
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126 * IT.TYP bit definitions if bit 7 of IT.TYP is clear (floppy disk)
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127 TYP.5 equ %00000000 5" media
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128 TYP.3 equ %00000001 3.5" media
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b75cb7ca03a6 Added TYP.SBO to rbfdefs (used by rb1773)
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129 TYP.SBO equ %00000010 Sector base offset (clear = 0; sect = 1)
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130 TYP.256 equ %00000000 256 byte sector media
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131 TYP.512 equ %00000100 512 byte sector media
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132 TYP.CCF equ %00100000 CoCo format
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133 TYP.NCCF equ %00000000 Non-CoCo format
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134
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135 * IT.DNS Definitions
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136 *
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137
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138 * If bit 7 of IT.TYP is set, IT.DNS is driver-dependent
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139
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140 * IT.DNS bit definitions if bit 7 of IT.TYP is clear (floppy disk)
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141 DNS.FM equ %00000000 Single-density (FM)
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142 DNS.MFM equ %00000001 Double-density (MFM)
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823c651e7dcd Updated DNS.STD and DNS.DTD definitions based on Gene Heskett's explanation:
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143 DNS.STD equ %00000000 Single track distance (48/135 tpi)
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144 DNS.DTD equ %00000010 Double track distance (96 tpi)
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145
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146 * Added PHS,2005-05-31, as format seems to use these
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147 DNS.FM0 equ %00000000 Single density track 0
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148 DNS.MFM0 equ %00000100 Double density track 0
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149
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150 * Floppy disk step rate definitions
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151 STP.30ms equ 0 30ms step rate
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152 STP.20ms equ 1 20ms step rate
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153 STP.12ms equ 2 12ms step rate
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154 STP.6ms equ 3 6ms step rate
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155
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157 *************************************
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158 * Random Block Path Descriptor Format
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159 *
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160 * A path descriptor is created for every new path that is open
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161 * via the I$Open system call (processed by IOMan). Process
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162 * descriptors track state information of a path.
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163 *
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164 org PD.FST
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165 PD.SMF rmb 1 State flags
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166 PD.CP rmb 4 Current logical byte position
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167 PD.SIZ rmb 4 File size
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168 PD.SBL rmb 3 Segment beginning lsn
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169 PD.SBP rmb 3 Segment beginning psn
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170 PD.SSZ rmb 3 Segment size
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171 PD.DSK rmb 2 Disk id
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172 PD.DTB rmb 2 Drive table ptr
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173 org PD.OPT
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174 rmb 1 Device type
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175 PD.DRV rmb 1 Drive number
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176 PD.STP rmb 1 Step rate
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177 PD.TYP rmb 1 Disk device type (5" 8" other)
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178 PD.DNS rmb 1 Density capability
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179 PD.CYL rmb 2 Number of cylinders
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180 PD.SID rmb 1 Number of surfaces
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181 PD.VFY rmb 1 0=verify disk writes
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182 PD.SCT rmb 2 Default sectors/track
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183 PD.T0S rmb 2 Default sectors/track tr00,s0
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184 PD.ILV rmb 1 Sector interleave offset
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185 PD.SAS rmb 1 Segment allocation size
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186 PD.TFM rmb 1 DMA Transfer Mode
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187 PD.Exten rmb 2 Path Extension (PE) for record locking
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188 PD.SToff rmb 1 Sector/Track offsets (for "foreign" disk formats)
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189 PD.ATT rmb 1 File attributes
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190 PD.FD rmb 3 File descriptor psn
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191 PD.DFD rmb 3 Directory file descriptor psn
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192 PD.DCP rmb 4 File directory entry ptr
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193 PD.DVT rmb 2 User readable dev tbl ptr
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194
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195 * State Flags
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196 BUFMOD equ $01 Buffer modified
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197 SINBUF equ $02 Sector in buffer
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198 FDBUF equ $04 File descriptor in buffer
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199 *EOFSEC equ $08 End of file sector
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200 *EOF equ $10 End of file
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201 InDriver equ $20 Currently in Disk Driver, or queued
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202 BufBusy equ $40 Buffer is currently busy
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203
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204 IFNE Level-1
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205 ************************************
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206 * Random Block Path Extension Format
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207 *
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208 * RBF paths under Level Two have additional information that
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209 * is referenced by the path extension area.
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210 *
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211 org 0
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212 PE.PE rmb 1 PE path number
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213 PE.PDptr rmb 2 Back ptr to this PE's Path Descriptor
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214 PE.NxFil rmb 2 Drive Open-File list ptr
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215 PE.Confl rmb 2 Circular File Conflict list
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216 PE.Lock rmb 1 Path lockout status
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217 PE.LoLck rmb 4 Low Locked Logical addr
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218 PE.HiLck rmb 4 High Locked Logical addr
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219 PE.Wait rmb 2 PE ptr to (next) locked-out PE
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220 PE.TmOut rmb 2 Max ticks to wait for locked segment
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221 PE.Owner rmb 1 Process ID of owner of locked segment
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222 PE.Req rmb 1 Temp for PE.Lock in GAIN when LockSeg fails
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223 PE.Prior rmb 1 Temp for process priority while in driver
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224 PE.SigSg rmb 1 Signal code to send
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225 PE.SigID rmb 1 Process ID to send the signal to
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226 rmb 32-. Reserved
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227 PE.FilNm rmb 32 Temp for filename during directory search
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228
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229 * PE.Lock status codes
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230 Unlocked equ 0 No portion of file is locked
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231 RcdLock equ 1 Record from LoLck to HiLck locked
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232 FileLock equ 2 Entire file locked
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233 EofLock equ 4 End of file is locked
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234 ENDC
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235
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236
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237 pag
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238 ***********************
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239 * LSN0 Disk Data Format
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240 *
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241 * Logical Sector Number 0 is the first sector on an RBF formatted device
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242 * and contains information about the device's size and format.
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243 *
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244 org 0
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245 DD.TOT rmb 3 Total number of sectors
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246 DD.TKS rmb 1 Track size in sectors
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247 DD.MAP rmb 2 Number of bytes in allocation bit map
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248 DD.BIT rmb 2 Number of sectors/bit
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249 DD.DIR rmb 3 Address of root directory fd
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250 DD.OWN rmb 2 Owner
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251 DD.ATT rmb 1 Attributes
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252 DD.DSK rmb 2 Disk ID
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253 DD.FMT rmb 1 Disk format; density/sides
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254 DD.SPT rmb 2 Sectors/track
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255 DD.RES rmb 2 Reserved for future use
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256 DD.SIZ equ . Device descriptor minimum size
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257 DD.BT rmb 3 System bootstrap sector
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258 DD.BSZ rmb 2 Size of system bootstrap
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259 DD.DAT rmb 5 Creation date
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260 DD.NAM rmb 32 Volume name
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261 DD.OPT rmb 32 Option area
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262
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263 * DD.FMT Bit Definitions - valid only if device is a floppy disk
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264 FMT.SIDE equ %00000001 Single Sided=0, Double Sided=1
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265 FMT.DNS equ %00000010 Single Density=0, Double Density=1
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266 FMT.TDNS equ %00000100 Track Density: 48/135 TPI=0, 96 TPI=1
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267 FMT.T0DN equ %00100000 Track 0 Density, see FMT.DNS
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268
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269
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270 pag
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271 ************************
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272 * File Descriptor Format
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273 *
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274 * The file descriptor is a sector that is present for every file
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275 * on an RBF device. It contains attributes, modification dates,
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276 * and segment information on a file.
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277 *
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278 org 0
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279 FD.ATT rmb 1 Attributes
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280 FD.OWN rmb 2 Owner
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281 FD.DAT rmb 5 Date last modified
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282 FD.LNK rmb 1 Link count
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283 FD.SIZ rmb 4 File size
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284 FD.Creat rmb 3 Segment list extension
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285 FD.SEG equ . Beginning of segment list
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286 * Segment List Entry Format
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287 org 0
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288 FDSL.A rmb 3 Segment beginning physical sector number
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289 FDSL.B rmb 2 Segment size
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290 FDSL.S equ . Segment list entry size
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291 FD.LS1 equ FD.SEG+((256-FD.SEG)/FDSL.S-1)*FDSL.S
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292 FD.LS2 equ (256/FDSL.S-1)*FDSL.S
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293 MINSEC set 16
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294
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295
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296 pag
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297 ************************
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298 * Directory Entry Format
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299 *
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300 * Directory entries are part of a directory and define the name
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301 * of the file, as well as a pointer to its file descriptor.
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302 *
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303 org 0
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304 DIR.NM rmb 29 File name
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305 DIR.FD rmb 3 File descriptor physical sector number
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306 DIR.SZ equ . Directory record size
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307
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308
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309 pag
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310 ********************
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311 * RBF Static Storage
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312 *
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313 * Overall Disk Static Storage
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314 *
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315 * Note: This does not reserve any memory for drive tables. Each
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316 * driver is responsible for reserving sufficient memory for
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317 * the appropriate number of tables.
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318 *
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319 org V.USER Reserve required ($06)
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320 V.NDRV rmb 1 Number of drives ($07)
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321 rmb 8 reserved ($08)
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322 DRVBEG equ . Beginning of drive tables ($10)
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323
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324
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325 pag
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326 ****************
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327 * Global Storage For Disk Drive Tables
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328 *
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329 * Each table contains the first 'DD.SIZ' bytes from
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330 * LSN 0, and the current track, stepping rate,
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331 * bitmap use flag, and disk type.
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332 *
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333 org 0
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334 rmb DD.SIZ Device descriptor, LSN 0
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335 V.TRAK rmb 2 Current track
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336 V.BMB rmb 1 Bit-map use flag
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337 V.FileHd rmb 2 Open file list for this drive
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338 V.DiskID rmb 2 Disk ID
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339 V.BMapSz rmb 1 Bitmap Size
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340 V.MapSct rmb 1 Lowest reasonable bitmap sector
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341 V.ResBit rmb 1 Reserved bitmap sector (for compaction)
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342 V.ScTkOf rmb 1 Sector/Track byte (Combined from descriptor)
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343 V.ScOfst rmb 1 Sector offset split from byte above
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344 V.TkOfst rmb 1 Track offset split from byte above
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345 rmb 4 Reserved
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346 DRVMEM equ .
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347
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348 ENDC
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349