1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Macros for accessing data port(s) on 8-bit |
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3 | ; IDE controllers. |
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4 | |
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5 | ; |
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6 | ; XTIDE Universal BIOS and Associated Tools |
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7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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8 | ; |
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9 | ; This program is free software; you can redistribute it and/or modify |
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10 | ; it under the terms of the GNU General Public License as published by |
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11 | ; the Free Software Foundation; either version 2 of the License, or |
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12 | ; (at your option) any later version. |
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13 | ; |
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14 | ; This program is distributed in the hope that it will be useful, |
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15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | ; GNU General Public License for more details. |
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18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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19 | ; |
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20 | |
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21 | %ifndef IDE_8BIT_INC |
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22 | %define IDE_8BIT_INC |
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23 | |
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24 | ;-------------------------------------------------------------------- |
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25 | ; Emulates INSW for XTIDE. |
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26 | ; |
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27 | ; XTIDE_INSW |
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28 | ; Parameters: |
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29 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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30 | ; DX: XTIDE Data Low Register address |
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31 | ; ES:DI: Ptr to destination buffer |
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32 | ; Returns: |
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33 | ; ES:DI: Incremented/decremented for next word |
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34 | ; Corrupts registers: |
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35 | ; AL, FLAGS |
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36 | ;-------------------------------------------------------------------- |
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37 | %macro XTIDE_INSW 0 |
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38 | %ifdef USE_186 ; INS instruction available |
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39 | insb ; Load low byte from port DX to [ES:DI] |
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40 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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41 | insb ; Load high byte from port DX to [ES:DI] |
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42 | xor dl, bl ; Restore to IDE Data Register |
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43 | %else ; If 8088/8086 |
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44 | in al, dx ; Load low byte from port |
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45 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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46 | stosb ; Store byte to [ES:DI] |
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47 | in al, dx ; Load high byte from port |
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48 | xor dl, bl ; Restore to IDE Data Register |
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49 | stosb ; Store byte to [ES:DI] |
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50 | %endif |
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51 | %endmacro |
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52 | |
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53 | |
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54 | ;-------------------------------------------------------------------- |
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55 | ; Emulates OUTSW for XTIDE. |
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56 | ; |
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57 | ; XTIDE_OUTSW |
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58 | ; Parameters: |
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59 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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60 | ; DX: XTIDE Data Low Register address |
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61 | ; DS:SI: Ptr to source buffer |
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62 | ; Returns: |
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63 | ; SI: Incremented/decremented for next word |
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64 | ; Corrupts registers: |
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65 | ; AX, FLAGS |
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66 | ;-------------------------------------------------------------------- |
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67 | %macro XTIDE_OUTSW 0 |
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68 | %ifdef USE_186 ; OUTS instruction available |
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69 | lodsb ; Load low byte from [DS:SI] to AL |
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70 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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71 | outsb ; Output high byte from [DS:SI] |
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72 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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73 | out dx, al ; Output low byte from AL |
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74 | %else ; If 8088/8086 |
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75 | lodsw ; Load word from [DS:SI] |
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76 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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77 | xchg al, ah ; => AL=high byte, AH=low byte |
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78 | out dx, al ; Output high byte |
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79 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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80 | mov al, ah ; Copy low byte to AL |
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81 | out dx, al ; Output low byte |
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82 | %endif |
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83 | %endmacro |
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84 | |
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85 | |
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86 | ;-------------------------------------------------------------------- |
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87 | ; Emulates OUTSW for modified XTIDE. |
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88 | ; |
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89 | ; XTIDE_MOD_OUTSW |
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90 | ; Parameters: |
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91 | ; DX: XTIDE Data Low Register address |
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92 | ; DS:SI: Ptr to source buffer |
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93 | ; Returns: |
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94 | ; SI: Incremented/decremented for next word |
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95 | ; Corrupts registers: |
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96 | ; AX, FLAGS |
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97 | ;-------------------------------------------------------------------- |
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98 | %macro XTIDE_MOD_OUTSW 0 |
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99 | %ifdef USE_186 ; OUTS instruction available |
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100 | lodsb ; Load low byte from [DS:SI] to AL |
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101 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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102 | outsb ; Output high byte from [DS:SI] |
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103 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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104 | out dx, al ; Output low byte from AL |
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105 | %else ; If 8088/8086 |
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106 | lodsw ; Load word from [DS:SI] |
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107 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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108 | xchg al, ah ; => AL=high byte, AH=low byte |
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109 | out dx, al ; Output high byte |
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110 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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111 | mov al, ah ; Copy low byte to AL |
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112 | out dx, al ; Output low byte |
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113 | %endif |
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114 | %endmacro |
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115 | |
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116 | |
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117 | %endif ; IDE_8BIT_INC |
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