source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/DisplayPrint.asm@ 364

Last change on this file since 364 was 341, checked in by krille_n_@…, 13 years ago

Changes:

  • Fixed a bug from r323 in DisplayPrint.asm.
  • Removed some unused code from XTIDECFG (undoing the change to Math.asm in r336 as part of it).
File size: 11.5 KB
Line 
1; Project name : Assembly Library
2; Description : Functions for display output.
3
4; Section containing code
5SECTION .text
6
7
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.
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.
28;
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;--------------------------------------------------------------------
44ALIGN JUMP_ALIGN
45DisplayPrint_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
64
65 ret
66
67
68;--------------------------------------------------------------------
69; DisplayPrint_SignedWordFromAXWithBaseInBX
70; Parameters:
71; AX: Word to display
72; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16)
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;--------------------------------------------------------------------
80%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
81ALIGN JUMP_ALIGN
82DisplayPrint_SignedWordFromAXWithBaseInBX:
83 test ax, ax
84 jns SHORT DisplayPrint_WordFromAXWithBaseInBX
85
86 push ax
87 mov al, '-'
88 call DisplayPrint_CharacterFromAL
89 pop ax
90 neg ax
91 ; Fall to DisplayPrint_WordFromAXWithBaseInBX
92%endif
93
94
95%ifndef MODULE_STRINGS_COMPRESSED
96;--------------------------------------------------------------------
97; DisplayPrint_WordFromAXWithBaseInBX
98; Parameters:
99; AX: Word 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
107;--------------------------------------------------------------------
108ALIGN JUMP_ALIGN
109DisplayPrint_WordFromAXWithBaseInBX:
110 push cx
111 push bx
112
113 xor cx, cx
114ALIGN JUMP_ALIGN
115.DivideLoop:
116 xor dx, dx ; DX:AX now holds the integer
117 div bx ; Divide DX:AX by base
118 push dx ; Push remainder
119 inc cx ; Increment character count
120 test ax, ax ; All divided?
121 jnz SHORT .DivideLoop ; If not, loop
122
123PrintAllPushedDigits:
124 mov bx, g_rgcDigitToCharacter
125ALIGN JUMP_ALIGN
126.PrintNextDigit:
127 pop ax ; Pop digit
128 cs xlatb
129 call DisplayPrint_CharacterFromAL
130 loop .PrintNextDigit
131
132 pop bx
133 pop cx
134 ret
135
136g_rgcDigitToCharacter: db "0123456789ABCDEF"
137
138;--------------------------------------------------------------------
139; DisplayPrint_QWordFromSSBPwithBaseInBX
140; Parameters:
141; SS:BP: QWord to display
142; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16)
143; DS: BDA segment (zero)
144; ES:DI: Ptr to cursor location in video RAM
145; Returns:
146; DI: Updated offset to video RAM
147; Corrupts registers:
148; AX, DX, [SS:BP]
149;--------------------------------------------------------------------
150%ifndef EXCLUDE_FROM_XTIDECFG ; Not used in XTIDECFG
151ALIGN JUMP_ALIGN
152DisplayPrint_QWordFromSSBPwithBaseInBX:
153 push cx
154 push bx
155
156 mov cx, bx ; CX = Integer base
157 xor bx, bx ; BX = Character count
158ALIGN JUMP_ALIGN
159.DivideLoop:
160 call Math_DivQWatSSBPbyCX; Divide by base
161 push dx ; Push remainder
162 inc bx ; Increment character count
163 cmp WORD [bp], BYTE 0 ; All divided?
164 jne SHORT .DivideLoop ; If not, loop
165 mov cx, bx ; Character count to CX
166 jmp SHORT PrintAllPushedDigits
167%endif ; EXCLUDE_FROM_XTIDECFG
168
169%endif ; MODULE_STRINGS_COMPRESSED
170
171
172;--------------------------------------------------------------------
173; DisplayPrint_CharacterBufferFromBXSIwithLengthInCX
174; Parameters:
175; CX: Buffer length (characters)
176; BX:SI: Ptr to NULL terminated string
177; DS: BDA segment (zero)
178; ES:DI: Ptr to cursor location in video RAM
179; Returns:
180; DI: Updated offset to video RAM
181; Corrupts registers:
182; AX, DX
183;--------------------------------------------------------------------
184%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
185ALIGN JUMP_ALIGN
186DisplayPrint_CharacterBufferFromBXSIwithLengthInCX:
187 jcxz .NothingToPrintSinceZeroLength
188 push si
189 push cx
190
191ALIGN JUMP_ALIGN
192.PrintNextCharacter:
193 mov ds, bx
194 lodsb
195 LOAD_BDA_SEGMENT_TO ds, dx
196 call DisplayPrint_CharacterFromAL
197 loop .PrintNextCharacter
198
199 pop cx
200 pop si
201.NothingToPrintSinceZeroLength:
202 ret
203%endif
204
205
206;--------------------------------------------------------------------
207; DisplayPrint_ClearScreenWithCharInALandAttributeInAH
208; Parameters:
209; AL: Character to clear with
210; AH: Attribute to clear with
211; DS: BDA segment (zero)
212; ES:DI: Ptr to cursor location in video RAM
213; Returns:
214; Nothing
215; Corrupts registers:
216; AX, DX
217;--------------------------------------------------------------------
218ALIGN JUMP_ALIGN
219DisplayPrint_ClearScreenWithCharInALandAttributeInAH:
220 push di
221 push cx
222
223 xchg cx, ax
224 xor ax, ax
225 call DisplayCursor_SetCoordinatesFromAX ; Updates DI
226 call DisplayPage_GetColumnsToALandRowsToAH
227 mul ah ; AX = AL*AH = Characters on screen
228 xchg cx, ax ; AX = Char+Attr, CX = WORDs to store
229 rep stosw
230
231 pop cx
232 pop di
233 mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], di
234 ret
235
236
237;--------------------------------------------------------------------
238; DisplayPrint_ClearAreaWithHeightInAHandWidthInAL
239; Parameters:
240; AH: Area height
241; AL: Area width
242; DS: BDA segment (zero)
243; ES:DI: Ptr to cursor location in video RAM
244; Returns:
245; DI: Updated offset to video RAM
246; Corrupts registers:
247; AX, DX
248;--------------------------------------------------------------------
249%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
250ALIGN JUMP_ALIGN
251DisplayPrint_ClearAreaWithHeightInAHandWidthInAL:
252 push si
253 push cx
254 push bx
255
256 xchg bx, ax ; Area size to BX
257 call DisplayCursor_GetSoftwareCoordinatesToAX
258 xchg si, ax ; Software (Y,X) coordinates now in SI
259 xor cx, cx
260
261ALIGN JUMP_ALIGN
262.ClearRowLoop:
263 mov cl, bl ; Area width now in CX
264 mov al, SCREEN_BACKGROUND_CHARACTER
265 call DisplayPrint_RepeatCharacterFromALwithCountInCX
266
267 xchg ax, si ; Coordinates to AX
268 inc ah ; Increment row
269 mov si, ax
270 call DisplayCursor_SetCoordinatesFromAX
271 dec bh ; Decrement rows left
272 jnz SHORT .ClearRowLoop
273
274 pop bx
275 pop cx
276 pop si
277 ret
278%endif
279
280
281;--------------------------------------------------------------------
282; DisplayPrint_RepeatCharacterFromALwithCountInCX
283; Parameters:
284; AL: Character to display
285; CX: Repeat count
286; DS: BDA segment (zero)
287; ES:DI: Ptr to cursor location in video RAM
288; Returns:
289; DI: Updated offset to video RAM
290; Corrupts registers:
291; DX
292;--------------------------------------------------------------------
293ALIGN JUMP_ALIGN
294DisplayPrint_RepeatCharacterFromALwithCountInCX:
295 jcxz .NothingToRepeat
296 push cx
297
298ALIGN JUMP_ALIGN
299.RepeatCharacter:
300 push ax
301 call DisplayPrint_CharacterFromAL
302 pop ax
303 loop .RepeatCharacter
304
305 pop cx
306.NothingToRepeat:
307 ret
308
309
310;--------------------------------------------------------------------
311; DisplayPrint_NullTerminatedStringFromCSSI
312; Parameters:
313; CS:SI: Ptr to NULL terminated string
314; DS: BDA segment (zero)
315; ES:DI: Ptr to cursor location in video RAM
316; Returns:
317; DI: Updated offset to video RAM
318; Corrupts registers:
319; AX, DX
320;--------------------------------------------------------------------
321%ifndef MODULE_STRINGS_COMPRESSED
322;;;
323;;; Take care when using this routine with compressed strings (which is why it is disabled).
324;;; All strings in CSSI should go through the DisplayFormatCompressed code to be decoded.
325;;;
326ALIGN JUMP_ALIGN
327DisplayPrint_NullTerminatedStringFromCSSI:
328 push bx
329 mov bx, cs
330 call DisplayPrint_NullTerminatedStringFromBXSI
331 pop bx
332 ret
333%endif
334
335
336;;;
337;;; Note that the following routines need to be at the bottom of this file
338;;; to accomodate short jumps from the next file (DisplayFormat/DisplayFormatCompressed)
339;;;
340
341;--------------------------------------------------------------------
342; DisplayPrint_Newline
343; Parameters:
344; DS: BDA segment (zero)
345; ES:DI: Ptr to cursor location in video RAM
346; Returns:
347; DI: Updated offset to video RAM
348; Corrupts registers:
349; AX, DX
350;--------------------------------------------------------------------
351%ifdef MODULE_STRINGS_COMPRESSED
352ALIGN JUMP_ALIGN
353DisplayPrint_Newline_FormatAdjustBP:
354 inc bp ; we didn't need a parameter after all, readjust BP
355 inc bp
356 ; fall through to DisplayPrint_Newline
357%endif
358
359ALIGN JUMP_ALIGN
360DisplayPrint_Newline:
361 mov al, LF
362 call DisplayPrint_CharacterFromAL
363 mov al, CR
364 ; Fall to DisplayPrint_CharacterFromAL
365
366;--------------------------------------------------------------------
367; DisplayPrint_CharacterFromAL
368; Parameters:
369; AL: Character to display
370; Zero value is ignored (no characer is printed)
371; DS: BDA segment (zero)
372; ES:DI: Ptr to cursor location in video RAM
373; Returns:
374; DI: Updated offset to video RAM
375; Corrupts registers:
376; AX, DX
377;--------------------------------------------------------------------
378ALIGN JUMP_ALIGN
379DisplayPrint_CharacterFromAL:
380 test al,al
381 jz DisplayPrint_Ret
382
383 mov ah, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute]
384 jmp [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fnCharOut]
385
386
387;--------------------------------------------------------------------
388; DisplayPrint_NullTerminatedStringFromBXSI
389; Parameters:
390; DS: BDA segment (zero)
391; BX:SI: Ptr to NULL terminated string
392; ES:DI: Ptr to cursor location in video RAM
393; Returns:
394; DI: Updated offset to video RAM
395; Corrupts registers:
396; AX, DX
397;--------------------------------------------------------------------
398ALIGN JUMP_ALIGN
399DisplayPrint_NullTerminatedStringFromBXSI:
400 push si
401 push cx
402
403 xor cx, cx
404ALIGN JUMP_ALIGN
405.PrintNextCharacter:
406 mov ds, bx ; String segment to DS
407 lodsb
408 mov ds, cx ; BDA segment to DS
409 test al, al ; NULL?
410 jz SHORT .EndOfString
411 call DisplayPrint_CharacterFromAL
412 jmp SHORT .PrintNextCharacter
413
414ALIGN JUMP_ALIGN
415.EndOfString:
416 pop cx
417 pop si
418
419DisplayPrint_Ret: ; random ret to jump to
420 ret
421
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