1 | ; $Id: startup.asm 142 2000-04-23 14:55:46Z ktk $
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2 |
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3 |
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4 | ; 16 bits entrypoints for the PDD and thunks to call 32 bits code
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5 | ;
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6 | ; Copyright (C) 2000 Sander van Leeuwen
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7 | ;
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8 | ; Partly based on MWDD32 (32 bits OS/2 device driver and IFS support driver)
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9 | ; Copyright (C) 1995, 1996 Matthieu WILLM
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10 | ;
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11 | ; This program is free software; you can redistribute it and/or modify
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12 | ; it under the terms of the GNU General Public License as published by
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13 | ; the Free Software Foundation; either version 2 of the License, or
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14 | ; (at your option) any later version.
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15 | ;
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16 | ; This program is distributed in the hope that it will be useful,
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17 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | ; GNU General Public License for more details.
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20 | ;
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21 | ; You should have received a copy of the GNU General Public License
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22 | ; along with this program; if not, write to the Free Software
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23 | ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 |
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25 | .386p
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26 |
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27 |
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28 | INCL_DOS equ 1
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29 | INCL_DOSERRORS equ 1
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30 | include os2.inc
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31 |
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32 | include sbseg.inc
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33 |
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34 | DevHlp_VirtToLin EQU 5Bh
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35 | DevHlp_VMLock EQU 55h
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36 |
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37 | ; Status word masks
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38 | STERR EQU 8000H ; Bit 15 - Error
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39 | STINTER EQU 0400H ; Bit 10 - Interim character
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40 | STBUI EQU 0200H ; Bit 9 - Busy
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41 | STDON EQU 0100H ; Bit 8 - Done
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42 | STECODE EQU 00FFH ; Error code
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43 |
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44 | ; Definition of the request packet header.
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45 |
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46 | reqPacket struc
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47 | reqLenght db ?
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48 | reqUnit db ?
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49 | reqCommand db ?
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50 | reqStatus dw ?
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51 | reqFlags db ?
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52 | db 3 dup (?) ; Reserved field
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53 | reqLink dd ?
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54 | reqPacket ends
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55 |
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56 | rpInitIn struc
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57 | i_rph db size reqPacket dup (?)
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58 | i_unit db ?
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59 | i_devHelp dd ?
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60 | i_initArgs dd ?
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61 | i_driveNum db ?
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62 | rpInitIn ends
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63 |
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64 | rpInitOut struc
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65 | o_rph db size reqPacket dup (?)
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66 | o_unit db ?
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67 | o_codeend dw ?
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68 | o_dataend dw ?
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69 | o_bpbarray dd ?
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70 | o_status dw ?
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71 | rpInitOut ends
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72 |
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73 | BEGINCS16 EQU OFFSET CODE16:help_stub_strategy
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74 | BEGINDS16 EQU OFFSET DATA16:help_header
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75 |
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76 | DATA16 segment
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77 | extrn DOS32FLATDS : abs ; ring 0 FLAT kernel data selector
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78 | public __OffFinalDS16
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79 | public help_header
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80 | public sblive_header
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81 | public _MSG_TABLE16
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82 | public DevHelpInit
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83 | public fOpen
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84 | public InitPktSeg
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85 | public InitPktOff
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86 | public _MESSAGE_STR
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87 | public pddname16
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88 | public FileName
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89 |
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90 | ;*********************************************************************************************
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91 | ;************************* Device Driver Header **********************************************
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92 | ;*********************************************************************************************
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93 | ;DEZE MOET ALS EERSTE blijven staan!!!!
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94 | help_header dw (OFFSET sblive_header - BEGINDS16)
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95 | ;dw OFFSET DATA16:sblive_header ; Pointer to next driver
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96 | dw SEG DATA16:sblive_header
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97 | dw 1000100110000000b ; Device attributes
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98 | ; ||||| +-+ ||||
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99 | ; ||||| | | |||+------------------ STDIN
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100 | ; ||||| | | ||+------------------- STDOUT
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101 | ; ||||| | | |+-------------------- NULL
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102 | ; ||||| | | +--------------------- CLOCK
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103 | ; ||||| | |
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104 | ; ||||| | +------------------------+ (001) OS/2
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105 | ; ||||| | | (010) DosDevIOCtl2 + SHUTDOWN
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106 | ; ||||| +--------------------------+ (011) Capability bit strip
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107 | ; |||||
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108 | ; ||||+----------------------------- OPEN/CLOSE (char) or Removable (blk)
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109 | ; |||+------------------------------ Sharing support
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110 | ; ||+------------------------------- IBM
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111 | ; |+-------------------------------- IDC entry point
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112 | ; +--------------------------------- char/block device driver
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113 |
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114 | ; dw offset CODE16:help_stub_strategy ; Strategy routine entry point
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115 | dw (offset help_stub_strategy - BEGINCS16) ; Strategy routine entry point
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116 | dw 0 ; IDC routine entry point
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117 | db 'OSSHLP$ ' ; Device name
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118 | db 8 dup (0) ; Reserved
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119 | dw 0000000000010011b ; Level 3 device driver capabilities
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120 | ; |||||
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121 | ; ||||+------------------ DosDevIOCtl2 + Shutdown
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122 | ; |||+------------------- More than 16 MB support
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123 | ; ||+-------------------- Parallel port driver
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124 | ; |+--------------------- Adapter device driver
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125 | ; +---------------------- InitComplete
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126 | dw 0000000000000000b
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127 |
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128 | sblive_header dd -1
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129 | dw 1101100110000000b ; Device attributes
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130 | ; ||||| +-+ ||||
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131 | ; ||||| | | |||+------------------ STDIN
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132 | ; ||||| | | ||+------------------- STDOUT
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133 | ; ||||| | | |+-------------------- NULL
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134 | ; ||||| | | +--------------------- CLOCK
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135 | ; ||||| | |
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136 | ; ||||| | +------------------------+ (001) OS/2
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137 | ; ||||| | | (010) DosDevIOCtl2 + SHUTDOWN
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138 | ; ||||| +--------------------------+ (011) Capability bit strip
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139 | ; |||||
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140 | ; ||||+----------------------------- OPEN/CLOSE (char) or Removable (blk)
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141 | ; |||+------------------------------ Sharing support
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142 | ; ||+------------------------------- IBM
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143 | ; |+-------------------------------- IDC entry point
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144 | ; +--------------------------------- char/block device driver
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145 |
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146 | ; dw offset CODE16:sblive_stub_strategy; Strategy routine entry point
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147 | dw (offset sblive_stub_strategy - BEGINCS16); Strategy routine entry point
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148 | dw (offset sblive_stub_idc - BEGINCS16) ; IDC routine entry point
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149 | db 'SBLIVE2$' ; Device name
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150 | db 8 dup (0) ; Reserved
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151 | dw 0000000000010011b ; Level 3 device driver capabilities
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152 | ; |||||
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153 | ; ||||+------------------ DosDevIOCtl2 + Shutdown
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154 | ; |||+------------------- More than 16 MB support
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155 | ; ||+-------------------- Parallel port driver
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156 | ; |+--------------------- Adapter device driver
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157 | ; +---------------------- InitComplete
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158 | dw 0000000000000000b
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159 |
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160 | DevHelpInit dd 0
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161 | fOpen dd 0
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162 | InitPktSeg dw 0
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163 | InitPktOff dw 0
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164 | ;needed for rmcalls.lib
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165 | _RM_Help0 dd 0
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166 | _RM_Help1 dd 0
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167 | _RM_Help3 dd 0
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168 | _RMFlags dd 0
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169 | _MESSAGE_STR db 1024 dup (0)
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170 | _MSG_TABLE16 dw 0 ;message length
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171 | dw (OFFSET _MESSAGE_STR - BEGINDS16) ;message far pointer
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172 | dw SEG _MESSAGE_STR
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173 |
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174 | pddname16 db 'SBLIVE2$'
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175 | FileName db "OSSHLP$", 0
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176 |
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177 | ;last byte in 16 bits data segment
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178 | __OffFinalDS16 label byte
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179 |
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180 | DATA16 ends
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181 |
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182 | CODE16 segment
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183 | assume cs:CODE16, ds:DATA16
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184 |
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185 | public __OffFinalCS16
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186 |
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187 | public help_stub_strategy
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188 | public sblive_stub_strategy
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189 | public sblive_stub_idc
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190 | public thunk3216_devhelp
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191 | public thunk3216_devhelp_modified_ds
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192 | public iodelay_
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193 | extrn DOSOPEN : far
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194 | extrn DOSWRITE : far
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195 | extrn DOSCLOSE : far
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196 | EXTRN DOSIODELAYCNT : ABS
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197 |
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198 | ;DEZE MOET ALS EERSTE blijven staan!!!!
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199 | help_stub_strategy proc far
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200 | pushad
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201 | push ds
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202 | push es
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203 | push fs
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204 | push gs
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205 |
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206 | mov ax, DATA16
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207 | mov ds, ax
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208 |
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209 | movzx eax, byte ptr es:[bx].reqCommand
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210 | cmp eax, 0 ; Init
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211 | je short @@help_init
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212 | cmp eax, 0Dh ; DosOpen
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213 | jne short @@help_error
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214 | ;DosOpen
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215 | cmp word ptr ds:(offset fOpen - BEGINDS16), 0
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216 | je short @@help_ret_ok ; not ours
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217 | push ebx ; later weer nodig
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218 | push es
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219 | mov word ptr ds:(offset fOpen - BEGINDS16), 0
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220 | mov ax, word ptr ds:(offset InitPktSeg-BEGINDS16)
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221 | mov fs, ax ; fs:ebx = req. packet
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222 | xor ebx, ebx
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223 | mov bx, word ptr ds:(offset InitPktOff - BEGINDS16)
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224 | call far ptr FLAT:STRATEGY_
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225 | pop es
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226 | pop ebx ; oude bx ptr
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227 | @@help_ret:
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228 | mov word ptr es:[bx].reqStatus, ax
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229 | @@help_ret_error:
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230 | pop gs
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231 | pop fs
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232 | pop es
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233 | pop ds
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234 | popad
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235 | ret
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236 |
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237 | @@help_init:
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238 | mov eax, dword ptr es:[bx].i_devHelp
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239 | mov dword ptr ds:(offset DevHelpInit - BEGINDS16), eax
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240 | mov word ptr es:[bx].o_codeend, (offset __OffFinalCS16 - BEGINCS16)
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241 | mov word ptr es:[bx].o_dataend, (offset __OffFinalDS16 - BEGINDS16)
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242 |
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243 | @@help_ret_ok:
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244 | mov ax, STDON
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245 | jmp short @@help_ret
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246 |
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247 | @@help_error:
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248 | mov ax, STDON + STERR + ERROR_I24_BAD_COMMAND
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249 | mov word ptr es:[bx].reqStatus, ax
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250 | jmp short @@help_ret_error
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251 |
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252 | help_stub_strategy endp
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253 |
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254 |
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255 | sblive_stub_strategy proc far
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256 | pushad
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257 | push ds
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258 | push es
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259 | push fs
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260 | push gs
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261 |
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262 | mov ax, DATA16
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263 | mov ds, ax
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264 |
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265 | movzx eax, byte ptr es:[bx].reqCommand
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266 | cmp eax, 0
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267 | jz short @@init
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268 |
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269 | push ebx
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270 | push es
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271 | mov ax, bx
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272 | xor ebx, ebx
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273 | mov bx, ax
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274 | mov ax, es
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275 | mov fs, ax ; fs:ebx = req. packet
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276 |
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277 | call far ptr FLAT:STRATEGY_ ; 32 bits strategy entry point
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278 |
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279 | pop es
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280 | pop ebx ; oude bx ptr
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281 | mov word ptr es:[bx].reqStatus, ax ; status code
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282 |
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283 | @@sblive_ret:
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284 |
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285 | pop gs
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286 | pop fs
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287 | pop es
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288 | pop ds
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289 | popad
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290 | ret
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291 |
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292 | @@init:
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293 | ;
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294 | ; DEVICE= initialization
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295 | ;
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296 | mov word ptr ds:(InitPktSeg - BEGINDS16), es
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297 | mov word ptr ds:(InitPktOff - BEGINDS16), bx
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298 | inc word ptr ds:(fOpen - BEGINDS16)
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299 | call device_init
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300 |
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301 | mov word ptr es:[bx].reqStatus, ax ; status code (ret by device_init)
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302 | mov word ptr es:[bx].o_codeend, (offset __OffFinalCS16 - BEGINCS16)
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303 | mov word ptr es:[bx].o_dataend, (offset __OffFinalDS16 - BEGINDS16)
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304 | jmp short @@sblive_ret
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305 |
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306 | init_err:
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307 | mov dword ptr es:[bx].i_devHelp, 0
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308 | jmp short @@sblive_ret
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309 |
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310 | sblive_stub_strategy endp
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311 |
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312 | ;in: cx = cmd
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313 | ; bx = lower 16 bits of ULONG parameter
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314 | ; dx = upper 16 bits of ULONG parameter
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315 | ;return value in dx:ax
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316 | sblive_stub_idc proc far
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317 | shl edx, 16
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318 | mov dx, bx
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319 | call far ptr FLAT:IDC_ ; 32 bits strategy entry point
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320 |
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321 | mov dx, ax
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322 | shr eax, 16
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323 | xchg ax, dx
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324 |
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325 | retf
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326 | sblive_stub_idc endp
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327 |
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328 | device_init proc near
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329 | enter 24, 0
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330 | push ds
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331 | push es
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332 | push bx
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333 | push si
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334 | push di
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335 |
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336 | ; bp -> old bp
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337 | ; bp - 2 -> FileHandle
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338 | ; bp - 4 -> ActionTaken
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339 | ; bp - 8 -> IOCTL parm (4 bytes) : union mwdd32_ioctl_init_device_parm
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340 | ; bp - 24 -> IOCTL data (16 bytes) : union mwdd32_ioctl_init_device_data
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341 |
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342 | ;
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343 | ; Opens wathlp$
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344 | ;
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345 | push seg DATA16 ; seg FileName
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346 | push (offset FileName - BEGINDS16) ; ofs FileName
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347 | push ss ; seg &FileHandle
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348 | lea ax, [bp - 2]
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349 | push ax ; ofs &FileHandle
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350 | push ss ; seg &ActionTaken
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351 | lea ax, [bp - 4]
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352 | push ax ; ofs &ActionTaken
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353 | push dword ptr 0 ; file size
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354 | push 0 ; file attributes
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355 | push OPEN_ACTION_FAIL_IF_NEW + OPEN_ACTION_OPEN_IF_EXISTS
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356 | push OPEN_SHARE_DENYNONE + OPEN_ACCESS_READONLY
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357 | push dword ptr 0 ; reserved
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358 | call DOSOPEN
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359 | cmp ax, NO_ERROR
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360 | jnz short @@error
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361 |
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362 |
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363 | ;
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364 | ; Closes wathlp$
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365 | ;
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366 | push word ptr [bp - 2] ; FileHandle
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367 | call DOSCLOSE
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368 | cmp ax, NO_ERROR
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369 | jnz short @@error
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370 |
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371 | @@out:
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372 | push eax ;gemold door doswrite
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373 |
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374 | push 0001H
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375 | push DATA16
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376 | push (offset _MESSAGE_STR - BEGINDS16)
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377 | push word ptr ds:(offset _MSG_TABLE16 - BEGINDS16)
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378 | push ss
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379 | lea dx, [bp - 2]
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380 | push dx
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381 | call far ptr DOSWRITE
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382 |
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383 | pop eax
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384 |
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385 | pop di
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386 | pop si
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387 | pop bx
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388 | pop es
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389 | pop ds
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390 | leave
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391 | ret
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392 | @@error:
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393 | mov ax, STDON + STERR + ERROR_I24_GEN_FAILURE
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394 | jmp short @@out
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395 |
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396 | device_init endp
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397 |
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398 | ALIGN 2
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399 | ;use devhlp pointer stored in 16 bits code segment
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400 | thunk3216_devhelp:
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401 | push ds
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402 | push DATA16
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403 | pop ds
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404 | call dword ptr ds:(offset DevHelpInit - BEGINDS16)
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405 | pop ds
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406 |
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407 | jmp far ptr FLAT:thunk1632_devhelp
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408 |
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409 | ALIGN 2
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410 | thunk3216_devhelp_modified_ds:
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411 | push gs
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412 | push DATA16
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413 | pop gs
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414 | call dword ptr gs:(offset DevHelpInit - BEGINDS16)
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415 | pop gs
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416 | jmp far ptr FLAT:thunk1632_devhelp_modified_ds
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417 |
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418 | iodelay_:
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419 | db 0B8h
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420 | dw DOSIODELAYCNT
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421 | align 4
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422 | @@: dec eax
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423 | jnz @b
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424 | loop iodelay_
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425 | jmp far ptr FLAT:thunk1632_iodelay32_
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426 |
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427 | ;end of 16 bits code segment
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428 | __OffFinalCS16 label byte
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429 |
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430 | CODE16 ends
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431 |
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432 | CODE32 segment
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433 | ASSUME CS:FLAT, DS:FLAT, ES:FLAT
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434 |
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435 | public __OffBeginCS32
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436 | public __GETDS
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437 | public thunk1632_devhelp
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438 | public thunk1632_devhelp_modified_ds
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439 | public DevHlp
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440 | public DevHlp_ModifiedDS
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441 | public STRATEGY_
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442 | public IDC_
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443 | public iodelay32_
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444 | public thunk1632_iodelay32_
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445 | extrn SBLIVE_STRATEGY : near
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446 | extrn SBLIVE_IDC : near
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447 | extrn KernThunkStackTo16 : near
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448 | extrn KernThunkStackTo32 : near
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449 |
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450 | __OffBeginCS32:
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451 |
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452 | ;Called by Watcom to set the DS
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453 | __GETDS proc near
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454 | push eax
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455 | mov eax, DOS32FLATDS
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456 | mov ds, eax
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457 | pop eax
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458 | ret
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459 | __GETDS endp
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460 |
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461 | __wcpp_2_pure_error__:
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462 | __wcpp_2_undef_vfun__:
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463 | __wcpp_2_undefed_cdtor__:
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464 | __wcpp_2_dtor_array_store__:
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465 | DevHelpDebug proc near
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466 | int 3
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467 | int 3
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468 | ret
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469 | DevHelpDebug endp
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470 |
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471 | ALIGN 4
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472 |
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473 | DevHlp proc near
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474 | IFDEF KEE
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475 | push eax
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476 | call KernThunkStackTo16
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477 | pop eax ;trashed by KernThunkStackTo16
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478 | ENDIF
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479 |
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480 | jmp far ptr CODE16:thunk3216_devhelp
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481 | ALIGN 4
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482 | thunk1632_devhelp:
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483 | IFDEF KEE
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484 | push eax
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485 | push edx
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486 | call KernThunkStackTo32
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487 | pop edx ;trashed by KernThunkStackTo32
|
---|
488 | pop eax ;trashed by KernThunkStackTo32
|
---|
489 | ENDIF
|
---|
490 | ret
|
---|
491 | DevHlp endp
|
---|
492 |
|
---|
493 | ALIGN 4
|
---|
494 | DevHlp_ModifiedDS proc near
|
---|
495 | IFDEF KEE
|
---|
496 | push eax
|
---|
497 | call KernThunkStackTo16
|
---|
498 | pop eax ;trashed by KernThunkStackTo16
|
---|
499 | ENDIF
|
---|
500 | jmp far ptr CODE16:thunk3216_devhelp_modified_ds
|
---|
501 | ALIGN 4
|
---|
502 | thunk1632_devhelp_modified_ds:
|
---|
503 | IFDEF KEE
|
---|
504 | push eax
|
---|
505 | push edx
|
---|
506 | call KernThunkStackTo32
|
---|
507 | pop edx ;trashed by KernThunkStackTo32
|
---|
508 | pop eax ;trashed by KernThunkStackTo32
|
---|
509 | ENDIF
|
---|
510 | ret
|
---|
511 | DevHlp_ModifiedDS endp
|
---|
512 |
|
---|
513 | iodelay32_ proc near
|
---|
514 | jmp far ptr CODE16:iodelay_
|
---|
515 | ALIGN 4
|
---|
516 | thunk1632_iodelay32_:
|
---|
517 | ret
|
---|
518 | iodelay32_ endp
|
---|
519 |
|
---|
520 | STRATEGY_ proc far
|
---|
521 | push ds
|
---|
522 | push es
|
---|
523 | push fs
|
---|
524 | push gs
|
---|
525 |
|
---|
526 | mov eax, DOS32FLATDS
|
---|
527 | mov ds, eax
|
---|
528 | mov es, eax
|
---|
529 | IFDEF KEE
|
---|
530 | push stacksel
|
---|
531 | push stackbase
|
---|
532 |
|
---|
533 | push edx
|
---|
534 | mov edx, ss
|
---|
535 | mov stacksel, edx
|
---|
536 |
|
---|
537 | call KernThunkStackTo32
|
---|
538 | mov stackbase, edx
|
---|
539 | pop edx ;trashed by KernThunkStackTo32
|
---|
540 | call SBLIVE_STRATEGY
|
---|
541 | push eax
|
---|
542 | call KernThunkStackTo16
|
---|
543 | pop eax ;trashed by KernThunkStackTo16
|
---|
544 |
|
---|
545 | pop stackbase
|
---|
546 | pop stacksel
|
---|
547 | ELSE
|
---|
548 | call SBLIVE_STRATEGY
|
---|
549 | ENDIF
|
---|
550 |
|
---|
551 | pop gs
|
---|
552 | pop fs
|
---|
553 | pop es
|
---|
554 | pop ds
|
---|
555 | retf
|
---|
556 | STRATEGY_ endp
|
---|
557 |
|
---|
558 | ;in: ecx = cmd
|
---|
559 | ; edx = ULONG parameter
|
---|
560 | ;return value in eax
|
---|
561 | IDC_ proc far
|
---|
562 | push ds
|
---|
563 | push es
|
---|
564 | push fs
|
---|
565 | push gs
|
---|
566 | push ebx
|
---|
567 |
|
---|
568 | mov eax, DOS32FLATDS
|
---|
569 | mov ds, eax
|
---|
570 | mov es, eax
|
---|
571 |
|
---|
572 | IFDEF KEE
|
---|
573 | push stacksel
|
---|
574 | push stackbase
|
---|
575 |
|
---|
576 | push edx
|
---|
577 | mov edx, ss
|
---|
578 | mov stacksel, edx
|
---|
579 |
|
---|
580 | call KernThunkStackTo32
|
---|
581 | mov stackbase, edx
|
---|
582 | pop edx ;trashed by KernThunkStackTo32
|
---|
583 |
|
---|
584 | call SBLIVE_IDC
|
---|
585 |
|
---|
586 | push eax
|
---|
587 | call KernThunkStackTo16
|
---|
588 | pop eax ;trashed by KernThunkStackTo16
|
---|
589 |
|
---|
590 | pop stackbase
|
---|
591 | pop stacksel
|
---|
592 | ELSE
|
---|
593 | call SBLIVE_IDC
|
---|
594 | ENDIF
|
---|
595 | pop ebx
|
---|
596 | pop gs
|
---|
597 | pop fs
|
---|
598 | pop es
|
---|
599 | pop ds
|
---|
600 | retf
|
---|
601 | IDC_ endp
|
---|
602 |
|
---|
603 | CODE32 ends
|
---|
604 |
|
---|
605 | DATA32 segment
|
---|
606 | public __OffsetFinalCS16
|
---|
607 | public __OffsetFinalDS16
|
---|
608 | public __wcpp_2_pure_error__
|
---|
609 | public __wcpp_2_undef_vfun__
|
---|
610 | public __wcpp_2_undefed_cdtor__
|
---|
611 | public __wcpp_2_dtor_array_store__
|
---|
612 | public PDDName
|
---|
613 | public _MSG_TABLE32
|
---|
614 | public __OffBeginDS32
|
---|
615 | public stackbase
|
---|
616 | public stacksel
|
---|
617 |
|
---|
618 | __OffBeginDS32 dd 0
|
---|
619 |
|
---|
620 | stacksel dd 0
|
---|
621 | stackbase dd 0
|
---|
622 |
|
---|
623 | __OffsetFinalCS16 dw (OFFSET CODE16:__OffFinalCS16 - BEGINCS16)
|
---|
624 | __OffsetFinalDS16 dw (OFFSET DATA16:__OffFinalDS16 - BEGINDS16)
|
---|
625 |
|
---|
626 | _MSG_TABLE32 dw (OFFSET DATA16:_MSG_TABLE16 - BEGINDS16)
|
---|
627 | dw SEG DATA16:_MSG_TABLE16
|
---|
628 |
|
---|
629 | ;16:16 address of driver name
|
---|
630 | PDDName dw (OFFSET DATA16:pddname16 - BEGINDS16)
|
---|
631 | dw SEG DATA16:pddname16
|
---|
632 |
|
---|
633 | DATA32 ends
|
---|
634 |
|
---|
635 | end
|
---|
636 |
|
---|