[41] | 1 | ; Project name : Assembly Library |
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| 2 | ; Description : Functions for managing keyboard. |
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| 3 | |
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[376] | 4 | ; |
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[526] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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[526] | 12 | ; |
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[376] | 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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[526] | 16 | ; GNU General Public License for more details. |
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[376] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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[526] | 20 | |
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[41] | 21 | BUFFER_SIZE_FOR_WORD_INPUT EQU 6 ; 5 chars + NULL |
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| 22 | |
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| 23 | ; Section containing code |
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| 24 | SECTION .text |
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| 25 | |
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| 26 | ;-------------------------------------------------------------------- |
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| 27 | ; Reads user inputted word. |
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| 28 | ; Function returns when ENTER or ESC will be pressed. |
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[133] | 29 | ; |
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[41] | 30 | ; Keyboard_ReadUserInputtedWordWhilePrinting |
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| 31 | ; Parameters |
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| 32 | ; BX: Numeric base (10 or 16) |
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| 33 | ; Returns: |
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| 34 | ; AX: User inputted word |
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| 35 | ; ZF: Set if user cancellation |
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| 36 | ; Corrupts registers: |
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| 37 | ; DX |
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| 38 | ;-------------------------------------------------------------------- |
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[592] | 39 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[369] | 40 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 41 | Keyboard_ReadUserInputtedWordWhilePrinting: |
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[52] | 42 | push ds |
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| 43 | push si |
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[41] | 44 | push cx |
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| 45 | |
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[602] | 46 | mov cl, BUFFER_SIZE_FOR_WORD_INPUT |
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| 47 | call Memory_ReserveCLbytesFromStackToDSSI |
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[41] | 48 | |
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| 49 | call Char_GetFilterFunctionToDXforNumericBaseInBX |
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[54] | 50 | call Registers_ExchangeDSSIwithESDI |
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[41] | 51 | call Keyboard_ReadUserInputtedStringToESDIWhilePrinting |
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[54] | 52 | call Registers_ExchangeDSSIwithESDI ; Does not modify FLAGS |
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[52] | 53 | jz SHORT .CancelledByUser |
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[41] | 54 | |
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| 55 | call String_ConvertWordToAXfromStringInDSSIwithBaseInBX |
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[52] | 56 | .CancelledByUser: |
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| 57 | add sp, BYTE BUFFER_SIZE_FOR_WORD_INPUT |
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[54] | 58 | test cx, cx ; Set ZF if string length is zero |
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[41] | 59 | pop cx |
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[52] | 60 | pop si |
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| 61 | pop ds |
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[41] | 62 | ret |
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[131] | 63 | %endif |
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[41] | 64 | |
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| 65 | |
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| 66 | ;-------------------------------------------------------------------- |
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| 67 | ; Reads user inputted string to buffer. Character filter is |
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| 68 | ; supported to ignore unwanted characters. |
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| 69 | ; Function returns when ENTER or ESC will be pressed. |
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[133] | 70 | ; |
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[41] | 71 | ; Keyboard_ReadUserInputtedStringToESDIWhilePrinting |
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| 72 | ; Parameters: |
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| 73 | ; CX: Buffer size (with NULL) |
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| 74 | ; ES:DI: Ptr to destination buffer |
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| 75 | ; CS:DX: Ptr to character filter function: |
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| 76 | ; Parameters: |
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| 77 | ; AL: Character inputted by user |
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| 78 | ; Returns: |
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| 79 | ; CF: Set if character is accepted |
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| 80 | ; Cleared if character is rejected |
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| 81 | ; Corrupts registers: |
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| 82 | ; Nothing |
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| 83 | ; Returns: |
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| 84 | ; CX: String length in characters (without NULL) |
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| 85 | ; ZF: Set if user cancellation |
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| 86 | ; Corrupts registers: |
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| 87 | ; AX |
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| 88 | ;-------------------------------------------------------------------- |
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[592] | 89 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[369] | 90 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 91 | Keyboard_ReadUserInputtedStringToESDIWhilePrinting: |
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| 92 | push di |
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| 93 | push si |
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| 94 | push bx |
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| 95 | call .PrepareDisplayContextForKeyboardInput |
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| 96 | jcxz .ReturnAfterUpdatingZF |
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| 97 | |
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| 98 | xor bx, bx ; Zero character counter |
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| 99 | dec cx ; Decrement buffer size for NULL |
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[592] | 100 | %ifdef CLD_NEEDED |
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[41] | 101 | cld |
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[592] | 102 | %endif |
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[369] | 103 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 104 | .GetCharacterFromUser: |
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| 105 | call Keyboard_GetKeystrokeToAXandWaitIfNecessary ; Get ASCII to AL |
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| 106 | call .ProcessControlCharacter |
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| 107 | jz SHORT .TerminateStringWithNULL |
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| 108 | jc SHORT .PlayBellForRejectedCharacter |
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| 109 | call dx ; Filter character |
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| 110 | jnc SHORT .PlayBellForRejectedCharacter |
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| 111 | inc bx ; Increment number of characters stored |
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| 112 | stosb ; Store from AL to ES:DI |
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| 113 | call Keyboard_PrintInputtedCharacter |
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| 114 | loop .GetCharacterFromUser |
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| 115 | .PlayBellForRejectedCharacter: |
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[48] | 116 | cmp al, BS ; No bell for backspace |
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| 117 | je SHORT .GetCharacterFromUser |
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[41] | 118 | call Keyboard_PlayBellForUnwantedKeystroke |
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| 119 | jmp SHORT .GetCharacterFromUser |
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| 120 | |
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| 121 | .TerminateStringWithNULL: |
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| 122 | stosb ; Terminate string with NULL |
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| 123 | mov cx, bx ; String length now in CX |
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| 124 | |
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| 125 | .ReturnAfterUpdatingZF: |
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| 126 | CALL_DISPLAY_LIBRARY PopDisplayContext |
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| 127 | test cx, cx ; Clear or set ZF |
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| 128 | pop bx |
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| 129 | pop si |
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| 130 | pop di |
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| 131 | ret |
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| 132 | |
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| 133 | ;-------------------------------------------------------------------- |
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| 134 | ; .PrepareDisplayContextForKeyboardInput |
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| 135 | ; Parameters: |
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| 136 | ; Nothing |
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| 137 | ; Returns: |
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| 138 | ; Nothing (Display context pushed to stack) |
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| 139 | ; Corrupts registers: |
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| 140 | ; AX, BX, SI |
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| 141 | ;-------------------------------------------------------------------- |
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[369] | 142 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 143 | .PrepareDisplayContextForKeyboardInput: |
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| 144 | pop bx ; Pop return address to BX |
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| 145 | mov si, di |
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| 146 | |
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| 147 | CALL_DISPLAY_LIBRARY PushDisplayContext |
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[407] | 148 | call DisplayCursor_GetDefaultCursorShapeToAX |
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[41] | 149 | CALL_DISPLAY_LIBRARY SetCursorShapeFromAX |
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| 150 | CALL_DISPLAY_LIBRARY SynchronizeDisplayContextToHardware |
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| 151 | |
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| 152 | mov di, si |
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| 153 | jmp bx |
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| 154 | |
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| 155 | |
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| 156 | ;-------------------------------------------------------------------- |
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| 157 | ; .ProcessControlCharacter |
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| 158 | ; Parameters: |
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| 159 | ; AL: Character inputted by user |
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| 160 | ; CX: Number of bytes left in buffer |
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| 161 | ; BX: Total number of characters inputted |
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| 162 | ; ES:DI: Ptr where to store next character |
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| 163 | ; Returns: |
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| 164 | ; AL: Character inputted by user or NULL if end of input |
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| 165 | ; BX: Cleared if user cancellation |
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| 166 | ; ZF: Set if user has ended or cancelled key input |
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| 167 | ; CF: Set if character is rejected |
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| 168 | ; Corrupts registers: |
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| 169 | ; AH |
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| 170 | ;-------------------------------------------------------------------- |
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[369] | 171 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 172 | .ProcessControlCharacter: |
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| 173 | cmp al, CR ; ENTER to terminate string? |
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| 174 | je SHORT .EndCharacterInput |
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| 175 | cmp al, ESC ; Cancel input? |
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| 176 | je SHORT .CancelCharacterInput |
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| 177 | cmp al, BS ; Backspace? |
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| 178 | je SHORT .Backspace |
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| 179 | jcxz .RejectCharacter |
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[145] | 180 | clc ; Clear CF (ZF is already cleared) |
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[41] | 181 | ret |
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| 182 | |
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| 183 | .Backspace: |
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| 184 | test bx, bx ; At the beginning? |
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| 185 | jz SHORT .RejectCharacter |
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| 186 | inc cx ; Increment bytes left |
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| 187 | dec bx ; Decrement characters inputted |
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| 188 | dec di |
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| 189 | call Keyboard_PrintBackspace |
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[48] | 190 | mov al, BS ; Restore character |
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[41] | 191 | .RejectCharacter: |
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| 192 | test al, al ; Clear ZF... |
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| 193 | stc ; ...and set CF |
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| 194 | ret |
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| 195 | |
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| 196 | .CancelCharacterInput: |
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| 197 | xor bx, bx |
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| 198 | .EndCharacterInput: |
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| 199 | xor al, al ; Set ZF and clear CF |
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| 200 | ret |
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[592] | 201 | %endif ; EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[41] | 202 | |
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| 203 | |
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| 204 | ;-------------------------------------------------------------------- |
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| 205 | ; Keyboard_PrintBackspace |
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| 206 | ; Parameters: |
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| 207 | ; Nothing |
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| 208 | ; Returns: |
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| 209 | ; Nothing |
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| 210 | ; Corrupts registers: |
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| 211 | ; AX |
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| 212 | ;-------------------------------------------------------------------- |
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[592] | 213 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[369] | 214 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 215 | Keyboard_PrintBackspace: |
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| 216 | mov al, BS |
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| 217 | call Keyboard_PrintInputtedCharacter |
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| 218 | mov al, ' ' |
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| 219 | call Keyboard_PrintInputtedCharacter |
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| 220 | mov al, BS |
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| 221 | jmp SHORT Keyboard_PrintInputtedCharacter |
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[131] | 222 | %endif |
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[41] | 223 | |
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| 224 | |
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| 225 | ;-------------------------------------------------------------------- |
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| 226 | ; Keyboard_PlayBellForUnwantedKeystroke |
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| 227 | ; Parameters: |
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| 228 | ; Nothing |
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| 229 | ; Returns: |
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| 230 | ; Nothing |
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| 231 | ; Corrupts registers: |
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| 232 | ; AX |
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| 233 | ;-------------------------------------------------------------------- |
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[592] | 234 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[369] | 235 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 236 | Keyboard_PlayBellForUnwantedKeystroke: |
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| 237 | mov al, BELL |
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| 238 | ; Fall to Keyboard_PrintInputtedCharacter |
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[131] | 239 | %endif |
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[41] | 240 | |
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| 241 | ;-------------------------------------------------------------------- |
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| 242 | ; Keyboard_PrintInputtedCharacter |
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| 243 | ; Parameters: |
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| 244 | ; AL: Character inputted by user |
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| 245 | ; Returns: |
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| 246 | ; Nothing |
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| 247 | ; Corrupts registers: |
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| 248 | ; AX |
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| 249 | ;-------------------------------------------------------------------- |
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[592] | 250 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS |
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[369] | 251 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 252 | Keyboard_PrintInputtedCharacter: |
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| 253 | push di |
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| 254 | CALL_DISPLAY_LIBRARY PrintCharacterFromAL |
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[48] | 255 | CALL_DISPLAY_LIBRARY SynchronizeDisplayContextToHardware ; Hardware cursor |
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[41] | 256 | pop di |
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| 257 | ret |
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[131] | 258 | %endif |
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[41] | 259 | |
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| 260 | |
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| 261 | ;-------------------------------------------------------------------- |
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| 262 | ; Keyboard_RemoveAllKeystrokesFromBuffer |
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| 263 | ; Parameters: |
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| 264 | ; Nothing |
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| 265 | ; Returns: |
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| 266 | ; Nothing |
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| 267 | ; Corrupts registers: |
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| 268 | ; AX |
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| 269 | ;-------------------------------------------------------------------- |
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[592] | 270 | %ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS ; Only used when debugging |
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[369] | 271 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 272 | Keyboard_RemoveAllKeystrokesFromBuffer: |
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| 273 | call Keyboard_GetKeystrokeToAX |
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| 274 | jnz SHORT Keyboard_RemoveAllKeystrokesFromBuffer |
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| 275 | ret |
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[133] | 276 | %endif |
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[41] | 277 | |
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| 278 | |
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| 279 | ;-------------------------------------------------------------------- |
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| 280 | ; Keyboard_GetKeystrokeToAX |
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| 281 | ; Keyboard_GetKeystrokeToAXandLeaveItToBuffer |
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| 282 | ; Keyboard_GetKeystrokeToAXandWaitIfNecessary |
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| 283 | ; Parameters: |
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| 284 | ; Nothing |
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| 285 | ; Returns: |
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| 286 | ; AL: ASCII character (if keystroke available) |
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| 287 | ; AH: BIOS scan code (if keystroke available) |
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| 288 | ; ZF: Set if no keystroke available |
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| 289 | ; Cleared if keystroke available |
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| 290 | ; Corrupts registers: |
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| 291 | ; Nothing |
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| 292 | ;-------------------------------------------------------------------- |
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[592] | 293 | %ifdef EXCLUDE_FROM_XUB |
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[492] | 294 | %define EXCLUDE |
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[589] | 295 | %ifdef MODULE_HOTKEYS OR MODULE_BOOT_MENU |
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[492] | 296 | %undef EXCLUDE |
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| 297 | %endif |
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| 298 | %endif |
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[526] | 299 | |
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[492] | 300 | %ifndef EXCLUDE |
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[369] | 301 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 302 | Keyboard_GetKeystrokeToAXandLeaveItToBuffer: |
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| 303 | mov ah, CHECK_FOR_KEYSTROKE |
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| 304 | int BIOS_KEYBOARD_INTERRUPT_16h |
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| 305 | ret |
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[526] | 306 | |
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[369] | 307 | ALIGN KEYBOARD_JUMP_ALIGN |
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[133] | 308 | Keyboard_GetKeystrokeToAX: |
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| 309 | call Keyboard_GetKeystrokeToAXandLeaveItToBuffer |
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| 310 | jz SHORT Keyboard_GetKeystrokeToAXReturn |
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| 311 | ; Fall to Keyboard_GetKeystrokeToAXandWaitIfNecessary |
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[369] | 312 | ALIGN KEYBOARD_JUMP_ALIGN |
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[41] | 313 | Keyboard_GetKeystrokeToAXandWaitIfNecessary: |
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| 314 | xor ah, ah ; GET_KEYSTROKE |
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| 315 | int BIOS_KEYBOARD_INTERRUPT_16h |
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| 316 | test ax, ax ; Clear ZF |
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[133] | 317 | Keyboard_GetKeystrokeToAXReturn: |
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[41] | 318 | ret |
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[526] | 319 | |
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[492] | 320 | %endif |
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| 321 | %undef EXCLUDE |
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