1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Command and port direction functions for different device types. |
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3 | |
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4 | ; Section containing code |
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5 | SECTION .text |
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6 | |
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7 | ;-------------------------------------------------------------------- |
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8 | ; Device_FinalizeDPT |
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9 | ; Parameters: |
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10 | ; DS:DI: Ptr to Disk Parameter Table |
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11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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12 | ; Returns: |
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13 | ; Nothing |
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14 | ; Corrupts registers: |
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15 | ; AX, BX, CX, DX |
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16 | ;-------------------------------------------------------------------- |
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17 | Device_FinalizeDPT: |
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18 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE |
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19 | jnz SHORT ReturnSuccessForSerialPort |
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20 | jmp IdeDPT_Finalize |
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21 | .FinalizeDptForSerialPortDevice: |
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22 | jmp SerialDPT_Finalize |
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23 | |
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24 | |
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25 | ;-------------------------------------------------------------------- |
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26 | ; Device_ResetMasterAndSlaveController |
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27 | ; Parameters: |
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28 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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29 | ; Returns: |
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30 | ; AH: INT 13h Error Code |
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31 | ; CF: Cleared if success, Set if error |
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32 | ; Corrupts registers: |
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33 | ; AL, BX, CX, DX |
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34 | ;-------------------------------------------------------------------- |
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35 | Device_ResetMasterAndSlaveController: |
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36 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE |
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37 | jnz SHORT ReturnSuccessForSerialPort |
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38 | jmp IdeCommand_ResetMasterAndSlaveController |
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39 | |
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40 | |
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41 | ;-------------------------------------------------------------------- |
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42 | ; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH |
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43 | ; Parameters: |
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44 | ; BH: Drive Select byte for Drive and Head Select Register |
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45 | ; DS: Segment to RAMVARS |
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46 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information |
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47 | ; CS:BP: Ptr to IDEVARS |
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48 | ; Returns: |
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49 | ; AH: INT 13h Error Code |
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50 | ; CF: Cleared if success, Set if error |
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51 | ; Corrupts registers: |
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52 | ; AL, BL, CX, DX, SI, DI, ES |
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53 | ;-------------------------------------------------------------------- |
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54 | Device_IdentifyToBufferInESSIwithDriveSelectByteInBH: |
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55 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT |
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56 | je SHORT .IdentifyDriveFromSerialPort |
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57 | jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH |
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58 | .IdentifyDriveFromSerialPort: |
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59 | jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH |
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60 | |
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61 | |
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62 | ;-------------------------------------------------------------------- |
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63 | ; Device_OutputCommandWithParameters |
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64 | ; Parameters: |
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65 | ; BH: Default system timer ticks for timeout (can be ignored) |
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66 | ; BL: IDE Status Register bit to poll after command |
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67 | ; ES:SI: Ptr to buffer (for data transfer commands) |
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68 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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69 | ; SS:BP: Ptr to IDEPACK |
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70 | ; Returns: |
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71 | ; AH: INT 13h Error Code |
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72 | ; CF: Cleared if success, Set if error |
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73 | ; Corrupts registers: |
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74 | ; AL, BX, CX, DX, (ES:SI for data transfer commands) |
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75 | ;-------------------------------------------------------------------- |
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76 | ALIGN JUMP_ALIGN |
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77 | Device_OutputCommandWithParameters: |
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78 | call IdeIrq_SetInServiceDPTandClearTaskFlag |
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79 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE |
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80 | jnz SHORT .OutputCommandToSerialPort |
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81 | jmp IdeCommand_OutputWithParameters |
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82 | ALIGN JUMP_ALIGN |
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83 | .OutputCommandToSerialPort: |
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84 | jmp SerialCommand_OutputWithParameters |
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85 | |
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86 | |
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87 | ;-------------------------------------------------------------------- |
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88 | ; Device_SelectDrive |
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89 | ; Parameters: |
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90 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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91 | ; SS:BP: Ptr to IDEPACK |
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92 | ; Returns: |
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93 | ; AH: INT 13h Error Code |
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94 | ; CF: Cleared if success, Set if error |
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95 | ; Corrupts registers: |
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96 | ; AL, BX, CX, DX |
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97 | ;-------------------------------------------------------------------- |
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98 | ALIGN JUMP_ALIGN |
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99 | Device_SelectDrive: |
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100 | test WORD [di+DPT.wFlags], FLG_DPT_SERIAL_DEVICE |
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101 | jnz SHORT ReturnSuccessForSerialPort |
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102 | jmp IdeCommand_SelectDrive |
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103 | ReturnSuccessForSerialPort: |
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104 | xor ax, ax |
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105 | ret |
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106 | |
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107 | |
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108 | ;-------------------------------------------------------------------- |
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109 | ; Device_OutputALtoIdeRegisterInDL |
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110 | ; Parameters: |
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111 | ; AL: Byte to output |
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112 | ; DL: IDE Register |
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113 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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114 | ; Returns: |
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115 | ; Nothing |
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116 | ; Corrupts registers: |
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117 | ; BX, DX |
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118 | ;-------------------------------------------------------------------- |
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119 | ALIGN JUMP_ALIGN |
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120 | Device_OutputALtoIdeRegisterInDL: |
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121 | mov bx, IdeIO_OutputALtoIdeRegisterInDX |
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122 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX |
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123 | |
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124 | |
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125 | ;-------------------------------------------------------------------- |
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126 | ; Device_OutputALtoIdeControlBlockRegisterInDL |
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127 | ; Parameters: |
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128 | ; AL: Byte to output |
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129 | ; DL: IDE Control Block Register |
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130 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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131 | ; Returns: |
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132 | ; Nothing |
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133 | ; Corrupts registers: |
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134 | ; BX, DX |
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135 | ;-------------------------------------------------------------------- |
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136 | ALIGN JUMP_ALIGN |
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137 | Device_OutputALtoIdeControlBlockRegisterInDL: |
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138 | mov bx, IdeIO_OutputALtoIdeControlBlockRegisterInDX |
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139 | jmp SHORT TranslateRegisterAddressInDLifNecessaryThenJumpToBX |
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140 | |
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141 | |
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142 | ;-------------------------------------------------------------------- |
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143 | ; Device_InputToALfromIdeRegisterInDL |
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144 | ; Parameters: |
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145 | ; DL: IDE Register |
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146 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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147 | ; Returns: |
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148 | ; AL: Inputted byte |
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149 | ; Corrupts registers: |
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150 | ; BX, DX |
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151 | ;-------------------------------------------------------------------- |
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152 | ALIGN JUMP_ALIGN |
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153 | Device_InputToALfromIdeRegisterInDL: |
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154 | mov bx, IdeIO_InputToALfromIdeRegisterInDX |
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155 | ; Fall to TranslateRegisterAddressInDLifNecessaryThenJumpToBX |
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156 | |
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157 | |
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158 | ;-------------------------------------------------------------------- |
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159 | ; TranslateRegisterAddressInDLifNecessaryThenJumpToBX |
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160 | ; Parameters: |
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161 | ; AL: Byte to output (if output function in BX) |
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162 | ; DL: IDE Register |
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163 | ; BX: I/O function to jump to |
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164 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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165 | ; Returns: |
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166 | ; AL: Inputted byte (if input function in BX) |
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167 | ; Corrupts registers: |
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168 | ; BX, DX |
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169 | ;-------------------------------------------------------------------- |
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170 | TranslateRegisterAddressInDLifNecessaryThenJumpToBX: |
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171 | test WORD [di+DPT.wFlags], FLG_DPT_REVERSED_A0_AND_A3 |
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172 | jz SHORT .JumpToIoFunctionInSI |
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173 | |
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174 | ; Exchange address lines A0 and A3 from DL |
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175 | mov dh, MASK_A3_AND_A0_ADDRESS_LINES |
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176 | and dh, dl ; DH = 0, 1, 8 or 9, we can ignore 0 and 9 |
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177 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH is 0 |
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178 | xor dh, MASK_A3_AND_A0_ADDRESS_LINES |
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179 | jz SHORT .JumpToIoFunctionInSI ; Jump out since DH was 9 |
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180 | and dl, ~MASK_A3_AND_A0_ADDRESS_LINES |
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181 | or dl, dh ; Address lines now reversed |
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182 | |
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183 | ALIGN JUMP_ALIGN |
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184 | .JumpToIoFunctionInSI: |
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185 | push bx |
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186 | xor dh, dh |
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187 | eMOVZX bx, BYTE [di+DPT.bIdevarsOffset]; CS:BX now points to IDEVARS |
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188 | ret |
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