source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/DisplayPrint.asm@ 375

Last change on this file since 375 was 369, checked in by gregli@…, 13 years ago

Removed align directives for initalization code and added define for align in boot-time calls to the assembly library (defaulting to 1), resulting in a significant savings for the AT and 386 builds. Fixed a bug with switch command line handling in the serial server. Put in CR characters in licesnse.txt, so that it properly displays on Windows. In the configurator, added default values for user supplied CHS and LBA values, defaulting to values within range when those features are enabled. Updated the copyright message in the configurator as the literal word Copyright is important.
File size: 11.6 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 DISPLAY_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 DISPLAY_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 DISPLAY_JUMP_ALIGN
109DisplayPrint_WordFromAXWithBaseInBX:
110 push cx
111 push bx
112
113 xor cx, cx
114ALIGN DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_JUMP_ALIGN
186DisplayPrint_CharacterBufferFromBXSIwithLengthInCX:
187 jcxz .NothingToPrintSinceZeroLength
188 push si
189 push cx
190
191ALIGN DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_JUMP_ALIGN
294DisplayPrint_RepeatCharacterFromALwithCountInCX:
295 jcxz .NothingToRepeat
296 push cx
297
298ALIGN DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_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 DISPLAY_JUMP_ALIGN
399DisplayPrint_NullTerminatedStringFromBXSI:
400 push si
401 push cx
402
403 xor cx, cx
404ALIGN DISPLAY_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 DISPLAY_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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