[41] | 1 | ; Project name : Assembly Library |
---|
| 2 | ; Description : Functions for display output. |
---|
| 3 | |
---|
| 4 | ; Section containing code |
---|
| 5 | SECTION .text |
---|
| 6 | |
---|
[223] | 7 | |
---|
[41] | 8 | ;-------------------------------------------------------------------- |
---|
| 9 | ; Supports following formatting types: |
---|
| 10 | ; %a Specifies attribute for next character |
---|
| 11 | ; %A Specifies attribute for remaining string (or until next %A) |
---|
| 12 | ; %d Prints signed 16-bit decimal integer |
---|
| 13 | ; %u Prints unsigned 16-bit decimal integer |
---|
| 14 | ; %x Prints 16-bit hexadecimal integer |
---|
| 15 | ; %s Prints string (from CS segment) |
---|
| 16 | ; %S Prints string (far pointer) |
---|
| 17 | ; %c Prints character |
---|
| 18 | ; %t Prints character number of times (character needs to be pushed first, then repeat times) |
---|
| 19 | ; %% Prints '%' character (no parameter pushed) |
---|
| 20 | ; |
---|
| 21 | ; Any placeholder can be set to minimum length by specifying |
---|
| 22 | ; minimum number of characters. For example %8d would append spaces |
---|
| 23 | ; after integer so that at least 8 characters would be printed. |
---|
[48] | 24 | ; |
---|
| 25 | ; When placing '-' after number, then spaces will be used for prepending. |
---|
| 26 | ; For example %8-d would prepend integer with spaces so that at least |
---|
| 27 | ; 8 characters would be printed. |
---|
[162] | 28 | ; |
---|
[41] | 29 | ; DisplayPrint_FormattedNullTerminatedStringFromCSSI |
---|
| 30 | ; Parameters: |
---|
| 31 | ; BP: SP before pushing parameters |
---|
| 32 | ; DS: BDA segment (zero) |
---|
| 33 | ; CS:SI: Pointer to string to format |
---|
| 34 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 35 | ; Stack: Parameters for formatting placeholders. |
---|
| 36 | ; Parameter for first placeholder must be pushed first. |
---|
| 37 | ; Low word must pushed first for placeholders requiring |
---|
| 38 | ; 32-bit parameters (two words). |
---|
| 39 | ; Returns: |
---|
| 40 | ; DI: Updated offset to video RAM |
---|
| 41 | ; Corrupts registers: |
---|
| 42 | ; AX, DX |
---|
| 43 | ;-------------------------------------------------------------------- |
---|
| 44 | ALIGN JUMP_ALIGN |
---|
| 45 | DisplayPrint_FormattedNullTerminatedStringFromCSSI: |
---|
| 46 | push bp |
---|
| 47 | push si |
---|
| 48 | push cx |
---|
| 49 | push bx |
---|
| 50 | push WORD [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute] |
---|
| 51 | |
---|
| 52 | dec bp ; Point BP to... |
---|
| 53 | dec bp ; ...first stack parameter |
---|
| 54 | call DisplayFormat_ParseCharacters |
---|
| 55 | |
---|
| 56 | ; Pop original character attribute |
---|
| 57 | pop ax |
---|
| 58 | mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute], al |
---|
| 59 | |
---|
| 60 | pop bx |
---|
| 61 | pop cx |
---|
| 62 | pop si |
---|
| 63 | pop bp |
---|
[186] | 64 | |
---|
[41] | 65 | ret |
---|
| 66 | |
---|
| 67 | |
---|
| 68 | ;-------------------------------------------------------------------- |
---|
[44] | 69 | ; DisplayPrint_SignedWordFromAXWithBaseInBX |
---|
[41] | 70 | ; Parameters: |
---|
| 71 | ; AX: Word to display |
---|
[44] | 72 | ; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16) |
---|
[41] | 73 | ; DS: BDA segment (zero) |
---|
| 74 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 75 | ; Returns: |
---|
| 76 | ; DI: Updated offset to video RAM |
---|
| 77 | ; Corrupts registers: |
---|
| 78 | ; AX, DX |
---|
| 79 | ;-------------------------------------------------------------------- |
---|
[134] | 80 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
---|
[41] | 81 | ALIGN JUMP_ALIGN |
---|
[44] | 82 | DisplayPrint_SignedWordFromAXWithBaseInBX: |
---|
| 83 | test ax, ax |
---|
| 84 | jns SHORT DisplayPrint_WordFromAXWithBaseInBX |
---|
[41] | 85 | |
---|
| 86 | push ax |
---|
| 87 | mov al, '-' |
---|
| 88 | call DisplayPrint_CharacterFromAL |
---|
| 89 | pop ax |
---|
| 90 | neg ax |
---|
[44] | 91 | ; Fall to DisplayPrint_WordFromAXWithBaseInBX |
---|
[134] | 92 | %endif |
---|
[41] | 93 | |
---|
[323] | 94 | |
---|
| 95 | %ifndef MODULE_STRINGS_COMPRESSED |
---|
[41] | 96 | ;-------------------------------------------------------------------- |
---|
[323] | 97 | ; DisplayPrint_QWordFromSSBPwithBaseInBX |
---|
| 98 | ; Parameters: |
---|
| 99 | ; SS:BP: QWord to display |
---|
| 100 | ; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16) |
---|
| 101 | ; DS: BDA segment (zero) |
---|
| 102 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 103 | ; Returns: |
---|
| 104 | ; DI: Updated offset to video RAM |
---|
| 105 | ; Corrupts registers: |
---|
| 106 | ; AX, DX, [SS:BP] |
---|
| 107 | ;-------------------------------------------------------------------- |
---|
| 108 | ALIGN JUMP_ALIGN |
---|
| 109 | DisplayPrint_QWordFromSSBPwithBaseInBX: |
---|
| 110 | push cx |
---|
| 111 | push bx |
---|
| 112 | |
---|
| 113 | mov cx, bx ; CX = Integer base |
---|
| 114 | xor bx, bx ; BX = Character count |
---|
| 115 | ALIGN JUMP_ALIGN |
---|
| 116 | .DivideLoop: |
---|
| 117 | call Math_DivQWatSSBPbyCX; Divide by base |
---|
| 118 | push dx ; Push remainder |
---|
| 119 | inc bx ; Increment character count |
---|
| 120 | cmp WORD [bp], BYTE 0 ; All divided? |
---|
| 121 | jne SHORT .DivideLoop ; If not, loop |
---|
| 122 | mov cx, bx ; Character count to CX |
---|
| 123 | jmp SHORT PrintAllPushedDigits |
---|
| 124 | |
---|
| 125 | |
---|
| 126 | ;-------------------------------------------------------------------- |
---|
[41] | 127 | ; DisplayPrint_WordFromAXWithBaseInBX |
---|
| 128 | ; Parameters: |
---|
| 129 | ; AX: Word to display |
---|
| 130 | ; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16) |
---|
| 131 | ; DS: BDA segment (zero) |
---|
| 132 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 133 | ; Returns: |
---|
| 134 | ; DI: Updated offset to video RAM |
---|
| 135 | ; Corrupts registers: |
---|
| 136 | ; AX, DX |
---|
[323] | 137 | ;-------------------------------------------------------------------- |
---|
[41] | 138 | ALIGN JUMP_ALIGN |
---|
| 139 | DisplayPrint_WordFromAXWithBaseInBX: |
---|
| 140 | push cx |
---|
[44] | 141 | push bx |
---|
[41] | 142 | |
---|
| 143 | xor cx, cx |
---|
| 144 | ALIGN JUMP_ALIGN |
---|
| 145 | .DivideLoop: |
---|
| 146 | xor dx, dx ; DX:AX now holds the integer |
---|
| 147 | div bx ; Divide DX:AX by base |
---|
| 148 | push dx ; Push remainder |
---|
| 149 | inc cx ; Increment character count |
---|
| 150 | test ax, ax ; All divided? |
---|
| 151 | jnz SHORT .DivideLoop ; If not, loop |
---|
[44] | 152 | |
---|
[323] | 153 | PrintAllPushedDigits: |
---|
| 154 | mov bx, g_rgcDigitToCharacter |
---|
[41] | 155 | ALIGN JUMP_ALIGN |
---|
[44] | 156 | .PrintNextDigit: |
---|
| 157 | pop ax ; Pop digit |
---|
[223] | 158 | cs xlatb |
---|
[41] | 159 | call DisplayPrint_CharacterFromAL |
---|
[44] | 160 | loop .PrintNextDigit |
---|
[41] | 161 | |
---|
[44] | 162 | pop bx |
---|
[41] | 163 | pop cx |
---|
| 164 | ret |
---|
[323] | 165 | g_rgcDigitToCharacter: db "0123456789ABCDEF" |
---|
[186] | 166 | |
---|
| 167 | %endif ; MODULE_STRINGS_COMPRESSED |
---|
[41] | 168 | |
---|
| 169 | |
---|
| 170 | ;-------------------------------------------------------------------- |
---|
| 171 | ; DisplayPrint_CharacterBufferFromBXSIwithLengthInCX |
---|
| 172 | ; Parameters: |
---|
| 173 | ; CX: Buffer length (characters) |
---|
| 174 | ; BX:SI: Ptr to NULL terminated string |
---|
| 175 | ; DS: BDA segment (zero) |
---|
| 176 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 177 | ; Returns: |
---|
| 178 | ; DI: Updated offset to video RAM |
---|
| 179 | ; Corrupts registers: |
---|
| 180 | ; AX, DX |
---|
| 181 | ;-------------------------------------------------------------------- |
---|
[223] | 182 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
---|
[41] | 183 | ALIGN JUMP_ALIGN |
---|
| 184 | DisplayPrint_CharacterBufferFromBXSIwithLengthInCX: |
---|
[44] | 185 | jcxz .NothingToPrintSinceZeroLength |
---|
| 186 | push si |
---|
[41] | 187 | push cx |
---|
| 188 | |
---|
| 189 | ALIGN JUMP_ALIGN |
---|
[44] | 190 | .PrintNextCharacter: |
---|
| 191 | mov ds, bx |
---|
| 192 | lodsb |
---|
| 193 | LOAD_BDA_SEGMENT_TO ds, dx |
---|
| 194 | call DisplayPrint_CharacterFromAL |
---|
| 195 | loop .PrintNextCharacter |
---|
| 196 | |
---|
[41] | 197 | pop cx |
---|
[44] | 198 | pop si |
---|
| 199 | .NothingToPrintSinceZeroLength: |
---|
[41] | 200 | ret |
---|
[194] | 201 | %endif |
---|
[41] | 202 | |
---|
[186] | 203 | |
---|
[41] | 204 | ;-------------------------------------------------------------------- |
---|
[67] | 205 | ; DisplayPrint_ClearScreenWithCharInALandAttributeInAH |
---|
[41] | 206 | ; Parameters: |
---|
[67] | 207 | ; AL: Character to clear with |
---|
| 208 | ; AH: Attribute to clear with |
---|
[41] | 209 | ; DS: BDA segment (zero) |
---|
| 210 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 211 | ; Returns: |
---|
| 212 | ; Nothing |
---|
| 213 | ; Corrupts registers: |
---|
| 214 | ; AX, DX |
---|
| 215 | ;-------------------------------------------------------------------- |
---|
| 216 | ALIGN JUMP_ALIGN |
---|
[67] | 217 | DisplayPrint_ClearScreenWithCharInALandAttributeInAH: |
---|
[41] | 218 | push di |
---|
[67] | 219 | push cx |
---|
| 220 | |
---|
| 221 | xchg cx, ax |
---|
[41] | 222 | xor ax, ax |
---|
[67] | 223 | call DisplayCursor_SetCoordinatesFromAX ; Updates DI |
---|
[41] | 224 | call DisplayPage_GetColumnsToALandRowsToAH |
---|
[67] | 225 | mul ah ; AX = AL*AH = Characters on screen |
---|
| 226 | xchg cx, ax ; AX = Char+Attr, CX = WORDs to store |
---|
| 227 | rep stosw |
---|
| 228 | |
---|
| 229 | pop cx |
---|
[41] | 230 | pop di |
---|
| 231 | mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], di |
---|
| 232 | ret |
---|
| 233 | |
---|
| 234 | |
---|
| 235 | ;-------------------------------------------------------------------- |
---|
| 236 | ; DisplayPrint_ClearAreaWithHeightInAHandWidthInAL |
---|
| 237 | ; Parameters: |
---|
| 238 | ; AH: Area height |
---|
| 239 | ; AL: Area width |
---|
| 240 | ; DS: BDA segment (zero) |
---|
| 241 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 242 | ; Returns: |
---|
[42] | 243 | ; DI: Updated offset to video RAM |
---|
[41] | 244 | ; Corrupts registers: |
---|
| 245 | ; AX, DX |
---|
| 246 | ;-------------------------------------------------------------------- |
---|
[134] | 247 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS |
---|
[41] | 248 | ALIGN JUMP_ALIGN |
---|
| 249 | DisplayPrint_ClearAreaWithHeightInAHandWidthInAL: |
---|
[42] | 250 | push si |
---|
[41] | 251 | push cx |
---|
| 252 | push bx |
---|
| 253 | |
---|
[42] | 254 | xchg bx, ax ; Area size to BX |
---|
[41] | 255 | call DisplayCursor_GetSoftwareCoordinatesToAX |
---|
[42] | 256 | xchg si, ax ; Software (Y,X) coordinates now in SI |
---|
| 257 | xor cx, cx |
---|
[41] | 258 | |
---|
| 259 | ALIGN JUMP_ALIGN |
---|
[42] | 260 | .ClearRowLoop: |
---|
| 261 | mov cl, bl ; Area width now in CX |
---|
[44] | 262 | mov al, SCREEN_BACKGROUND_CHARACTER |
---|
[42] | 263 | call DisplayPrint_RepeatCharacterFromALwithCountInCX |
---|
[41] | 264 | |
---|
[42] | 265 | xchg ax, si ; Coordinates to AX |
---|
| 266 | inc ah ; Increment row |
---|
| 267 | mov si, ax |
---|
[41] | 268 | call DisplayCursor_SetCoordinatesFromAX |
---|
[42] | 269 | dec bh ; Decrement rows left |
---|
| 270 | jnz SHORT .ClearRowLoop |
---|
[41] | 271 | |
---|
| 272 | pop bx |
---|
| 273 | pop cx |
---|
[42] | 274 | pop si |
---|
[41] | 275 | ret |
---|
[134] | 276 | %endif |
---|
[42] | 277 | |
---|
| 278 | |
---|
| 279 | ;-------------------------------------------------------------------- |
---|
| 280 | ; DisplayPrint_RepeatCharacterFromALwithCountInCX |
---|
| 281 | ; Parameters: |
---|
| 282 | ; AL: Character to display |
---|
| 283 | ; CX: Repeat count |
---|
| 284 | ; DS: BDA segment (zero) |
---|
| 285 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 286 | ; Returns: |
---|
| 287 | ; DI: Updated offset to video RAM |
---|
| 288 | ; Corrupts registers: |
---|
[181] | 289 | ; DX |
---|
[42] | 290 | ;-------------------------------------------------------------------- |
---|
| 291 | ALIGN JUMP_ALIGN |
---|
| 292 | DisplayPrint_RepeatCharacterFromALwithCountInCX: |
---|
[44] | 293 | jcxz .NothingToRepeat |
---|
| 294 | push cx |
---|
| 295 | |
---|
| 296 | ALIGN JUMP_ALIGN |
---|
| 297 | .RepeatCharacter: |
---|
[42] | 298 | push ax |
---|
| 299 | call DisplayPrint_CharacterFromAL |
---|
| 300 | pop ax |
---|
[44] | 301 | loop .RepeatCharacter |
---|
| 302 | |
---|
| 303 | pop cx |
---|
| 304 | .NothingToRepeat: |
---|
[42] | 305 | ret |
---|
[223] | 306 | |
---|
[186] | 307 | |
---|
| 308 | ;-------------------------------------------------------------------- |
---|
| 309 | ; DisplayPrint_NullTerminatedStringFromCSSI |
---|
| 310 | ; Parameters: |
---|
| 311 | ; CS:SI: Ptr to NULL terminated string |
---|
| 312 | ; DS: BDA segment (zero) |
---|
| 313 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 314 | ; Returns: |
---|
| 315 | ; DI: Updated offset to video RAM |
---|
| 316 | ; Corrupts registers: |
---|
| 317 | ; AX, DX |
---|
| 318 | ;-------------------------------------------------------------------- |
---|
| 319 | %ifndef MODULE_STRINGS_COMPRESSED |
---|
| 320 | ;;; |
---|
| 321 | ;;; Take care when using this routine with compressed strings (which is why it is disabled). |
---|
| 322 | ;;; All strings in CSSI should go through the DisplayFormatCompressed code to be decoded. |
---|
[223] | 323 | ;;; |
---|
[186] | 324 | ALIGN JUMP_ALIGN |
---|
| 325 | DisplayPrint_NullTerminatedStringFromCSSI: |
---|
| 326 | push bx |
---|
| 327 | mov bx, cs |
---|
| 328 | call DisplayPrint_NullTerminatedStringFromBXSI |
---|
| 329 | pop bx |
---|
| 330 | ret |
---|
| 331 | %endif |
---|
[42] | 332 | |
---|
| 333 | |
---|
[186] | 334 | ;;; |
---|
| 335 | ;;; Note that the following routines need to be at the bottom of this file |
---|
| 336 | ;;; to accomodate short jumps from the next file (DisplayFormat/DisplayFormatCompressed) |
---|
[223] | 337 | ;;; |
---|
[186] | 338 | |
---|
[42] | 339 | ;-------------------------------------------------------------------- |
---|
[44] | 340 | ; DisplayPrint_Newline |
---|
| 341 | ; Parameters: |
---|
| 342 | ; DS: BDA segment (zero) |
---|
| 343 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 344 | ; Returns: |
---|
| 345 | ; DI: Updated offset to video RAM |
---|
| 346 | ; Corrupts registers: |
---|
| 347 | ; AX, DX |
---|
| 348 | ;-------------------------------------------------------------------- |
---|
[186] | 349 | %ifdef MODULE_STRINGS_COMPRESSED |
---|
[44] | 350 | ALIGN JUMP_ALIGN |
---|
[186] | 351 | DisplayPrint_Newline_FormatAdjustBP: |
---|
[223] | 352 | inc bp ; we didn't need a parameter after all, readjust BP |
---|
[186] | 353 | inc bp |
---|
[194] | 354 | ; fall through to DisplayPrint_Newline |
---|
[186] | 355 | %endif |
---|
| 356 | |
---|
[223] | 357 | ALIGN JUMP_ALIGN |
---|
[44] | 358 | DisplayPrint_Newline: |
---|
[52] | 359 | mov al, LF |
---|
| 360 | call DisplayPrint_CharacterFromAL |
---|
[44] | 361 | mov al, CR |
---|
| 362 | ; Fall to DisplayPrint_CharacterFromAL |
---|
| 363 | |
---|
| 364 | ;-------------------------------------------------------------------- |
---|
[42] | 365 | ; DisplayPrint_CharacterFromAL |
---|
| 366 | ; Parameters: |
---|
| 367 | ; AL: Character to display |
---|
[186] | 368 | ; Zero value is ignored (no characer is printed) |
---|
[42] | 369 | ; DS: BDA segment (zero) |
---|
| 370 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 371 | ; Returns: |
---|
| 372 | ; DI: Updated offset to video RAM |
---|
| 373 | ; Corrupts registers: |
---|
| 374 | ; AX, DX |
---|
| 375 | ;-------------------------------------------------------------------- |
---|
| 376 | ALIGN JUMP_ALIGN |
---|
| 377 | DisplayPrint_CharacterFromAL: |
---|
[186] | 378 | test al,al |
---|
| 379 | jz DisplayPrint_Ret |
---|
[241] | 380 | |
---|
[42] | 381 | mov ah, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute] |
---|
| 382 | jmp [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fnCharOut] |
---|
[186] | 383 | |
---|
[223] | 384 | |
---|
[186] | 385 | ;-------------------------------------------------------------------- |
---|
| 386 | ; DisplayPrint_NullTerminatedStringFromBXSI |
---|
| 387 | ; Parameters: |
---|
| 388 | ; DS: BDA segment (zero) |
---|
| 389 | ; BX:SI: Ptr to NULL terminated string |
---|
| 390 | ; ES:DI: Ptr to cursor location in video RAM |
---|
| 391 | ; Returns: |
---|
| 392 | ; DI: Updated offset to video RAM |
---|
| 393 | ; Corrupts registers: |
---|
| 394 | ; AX, DX |
---|
| 395 | ;-------------------------------------------------------------------- |
---|
| 396 | ALIGN JUMP_ALIGN |
---|
| 397 | DisplayPrint_NullTerminatedStringFromBXSI: |
---|
| 398 | push si |
---|
| 399 | push cx |
---|
| 400 | |
---|
| 401 | xor cx, cx |
---|
| 402 | ALIGN JUMP_ALIGN |
---|
| 403 | .PrintNextCharacter: |
---|
| 404 | mov ds, bx ; String segment to DS |
---|
| 405 | lodsb |
---|
| 406 | mov ds, cx ; BDA segment to DS |
---|
| 407 | test al, al ; NULL? |
---|
| 408 | jz SHORT .EndOfString |
---|
| 409 | call DisplayPrint_CharacterFromAL |
---|
| 410 | jmp SHORT .PrintNextCharacter |
---|
| 411 | |
---|
| 412 | ALIGN JUMP_ALIGN |
---|
| 413 | .EndOfString: |
---|
| 414 | pop cx |
---|
| 415 | pop si |
---|
[223] | 416 | |
---|
| 417 | DisplayPrint_Ret: ; random ret to jump to |
---|
[186] | 418 | ret |
---|
| 419 | |
---|