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DisplayContext.asm@ 624

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Last change on this file since 624 was 592, checked in by Krister Nordvall, 6 years ago

Changes:

The problem with NASM in the previous revision (r591) has been fixed.
The colors used by the boot menu and hotkey bar can now be customized by selecting one of a number of pre-defined color themes. Suggestions for additional themes are more than welcome!
Large builds are now 10 KB. Small builds are still 8 KB with the exception of the Tiny build which is now 4 KB. In other words, builds are now as small as possible to make it easier to combine them with other BIOSes.
Added code to the library to improve drive error handling. XTIDECFG can now handle "Drive Not Ready" errors.
Fixed a couple of potential bugs in AtaID.asm (AtaID_GetMaxPioModeToAXandMinCycleTimeToCX); 1) ATA1.bPioMode was treated as a WORD variable. 2) ATA2.bPIOSupp was assumed to be non-zero which would result in PIO mode 3 being returned if the assumption was wrong.
Made the same changes in the equivalent function used by BIOSDRVS (DisplayPioModeInformationUsingAtaInfoFromDSBX in AtaInfo.asm).
Fixed a bug from r587 in PDC20x30.asm in PDC20x30_GetMaxPioModeToALandMinPioCycleTimeToBX.
Fixed a bug from r523 in XTIDECFG where Auto Configure would only set the IRQ on one IDE interface on AT-builds.
XTIDECFG will now restore the default settings for the "Serial port virtual device" when reselecting it in the list of device types. This makes it behave consistently for all device types.
The eAAM macro is now used regardless if USE_UNDOC_INTEL is defined or not because it is apparently supported on all processors including the NEC V20/V30 CPUs.
Renamed the EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS define to EXCLUDE_FROM_XUB.
Added a define to exclude unused library code from BIOSDRVS (EXCLUDE_FROM_BIOSDRVS). This makes it a lot smaller than in previous revisions.
All unnecessary CLD-instructions are now under a new define 'CLD_NEEDED' which is only enabled for the BIOS. It is disabled for XTIDECFG and BIOSDRVS but can be enabled if needed by adding this define to the respective makefile. This change was made because these unnecessary instructions are wasteful and should never be needed. In fact, they only serve to hide bugs (in other peoples code) which I strongly believe should be avoided. I recommend people making their own BIOSes from source to not use this define as it's extremely unlikely to be needed.
Updated the copyright info in SerDrive and changed an URL to point to the new site.
Updated the copyright info and version number in BIOSDRVS.
Updated the copyright info in XTIDECFG.
Optimizations in general.

File size: 11.1 KB

Rev	Line
[41]	1	; Project name : Assembly Library
	2	; Description : Functions for managing display context.
	3
[376]	4	;
[491]	5	; XTIDE Universal BIOS and Associated Tools
[526]	6	; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
[376]	7	;
	8	; This program is free software; you can redistribute it and/or modify
	9	; it under the terms of the GNU General Public License as published by
	10	; the Free Software Foundation; either version 2 of the License, or
	11	; (at your option) any later version.
[491]	12	;
[376]	13	; This program is distributed in the hope that it will be useful,
	14	; but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
[491]	16	; GNU General Public License for more details.
[376]	17	; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
[491]	18	;
[376]	19
[41]	20	; Section containing code
	21	SECTION .text
	22
	23	;--------------------------------------------------------------------
	24	; DisplayContext_Initialize
	25	; Parameters:
	26	; DS: BDA segment (zero)
	27	; Returns:
	28	; Nothing
	29	; Corrupts registers:
	30	; AX, DX, DI
	31	;--------------------------------------------------------------------
[369]	32	ALIGN DISPLAY_JUMP_ALIGN
[41]	33	DisplayContext_Initialize:
	34	mov WORD [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fnCharOut], DEFAULT_CHARACTER_OUTPUT
[44]	35	mov BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute], SCREEN_BACKGROUND_ATTRIBUTE
[407]	36	call DisplayCursor_GetDefaultCursorShapeToAX
[287]	37	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCursorShape], ax
[101]	38	; Fall to .DetectAndSetDisplaySegment
[41]	39
	40	;--------------------------------------------------------------------
	41	; .DetectAndSetDisplaySegment
	42	; Parameters:
	43	; DS: BDA segment (zero)
	44	; Returns:
	45	; Nothing
	46	; Corrupts registers:
[50]	47	; AX, DX
[41]	48	;--------------------------------------------------------------------
	49	.DetectAndSetDisplaySegment:
[50]	50	mov ax, COLOR_TEXT_SEGMENT
[41]	51	cmp BYTE [VIDEO_BDA.bMode], MDA_TEXT_MODE
[101]	52	eCMOVE ah, MONO_TEXT_SEGMENT >> 8
[50]	53	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition+2], ax
[101]	54	; Fall to .InitializeFlags
[50]	55
	56	;--------------------------------------------------------------------
	57	; .InitializeFlags
	58	; Parameters:
	59	; DS: BDA segment (zero)
	60	; Returns:
	61	; Nothing
	62	; Corrupts registers:
	63	; AX, DX
	64	;--------------------------------------------------------------------
	65	.InitializeFlags:
	66	mov dl, FLG_CONTEXT_ATTRIBUTES
	67	call CgaSnow_IsCgaPresent
[588]	68	eCMOVC dl, FLG_CONTEXT_ATTRIBUTES \| FLG_CONTEXT_CGA
[50]	69	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], dl
[101]	70	; Fall to .InitializeCursor
[41]	71
[101]	72	;--------------------------------------------------------------------
	73	; .InitializeCursor
	74	; Parameters:
	75	; DS: BDA segment (zero)
	76	; Returns:
	77	; Nothing
	78	; Corrupts registers:
	79	; AX, DX
	80	;--------------------------------------------------------------------
	81	.InitializeCursor:
[115]	82	call DisplayCursor_GetHardwareCoordinatesToAX ; Coordinates before init
	83	call DisplayCursor_SetCoordinatesFromAX ; Cursor to Display Context
[101]	84	; Fall to DisplayContext_SynchronizeToHardware
[41]	85
	86	;--------------------------------------------------------------------
[101]	87	; DisplayContext_SynchronizeToHardware
	88	; Parameters:
	89	; DS: BDA segment (zero)
	90	; Returns:
	91	; Nothing
	92	; Corrupts registers:
	93	; AX, DX
	94	;--------------------------------------------------------------------
[369]	95	ALIGN DISPLAY_JUMP_ALIGN
[101]	96	DisplayContext_SynchronizeToHardware:
	97	call DisplayPage_SynchronizeToHardware
	98	call DisplayCursor_SynchronizeShapeToHardware
	99	jmp DisplayCursor_SynchronizeCoordinatesToHardware
	100
	101
	102	;--------------------------------------------------------------------
[41]	103	; DisplayContext_Push
[491]	104	; DisplayContext_Pop
[41]	105	; Parameters:
	106	; Nothing
	107	; Returns:
	108	; Nothing
	109	; Corrupts registers:
	110	; AX, DI
	111	;--------------------------------------------------------------------
[592]	112	%ifdef EXCLUDE_FROM_XUB
[491]	113	%ifndef MODULE_BOOT_MENU
	114	%define EXCLUDE
	115	%endif
	116	%endif
	117
[592]	118	%ifndef EXCLUDE OR EXCLUDE_FROM_BIOSDRVS
[369]	119	ALIGN DISPLAY_JUMP_ALIGN
[41]	120	DisplayContext_Push:
	121	mov di, ds ; Backup DS
	122	LOAD_BDA_SEGMENT_TO ds, ax
	123	pop ax ; Pop return address
	124
[194]	125	%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
[41]	126	%assign i 0
[531]	127	%ifdef USE_386
	128	%rep DISPLAY_CONTEXT_size / 4
	129	push DWORD [VIDEO_BDA.displayContext + i]
	130	%assign i i+4
	131	%endrep
	132	%else
	133	%rep DISPLAY_CONTEXT_size / 2
	134	push WORD [VIDEO_BDA.displayContext + i]
	135	%assign i i+2
	136	%endrep
	137	%endif
[194]	138	%endif
[491]	139
[41]	140	mov ds, di ; Restore DS
	141	jmp ax
	142
[491]	143
[369]	144	ALIGN DISPLAY_JUMP_ALIGN
[41]	145	DisplayContext_Pop:
	146	mov di, ds ; Backup DS
	147	LOAD_BDA_SEGMENT_TO ds, ax
	148	pop ax ; Pop return address
	149
[491]	150	%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
[531]	151	%ifdef USE_386
	152	%assign i DISPLAY_CONTEXT_size-4
	153	%rep DISPLAY_CONTEXT_size / 4
	154	pop DWORD [VIDEO_BDA.displayContext + i]
	155	%assign i i-4
	156	%endrep
	157	%else
	158	%assign i DISPLAY_CONTEXT_size-2
	159	%rep DISPLAY_CONTEXT_size / 2
	160	pop WORD [VIDEO_BDA.displayContext + i]
	161	%assign i i-2
	162	%endrep
	163	%endif
[194]	164	%endif
[491]	165
[41]	166	push ax ; Push return address
	167	push dx
	168	call DisplayContext_SynchronizeToHardware
	169	pop dx
	170	mov ds, di ; Restore DS
	171	ret
[592]	172	%endif ; EXCLUDE OR EXCLUDE_FROM_BIOSDRVS
[491]	173	%undef EXCLUDE
[41]	174
[491]	175
[41]	176	;--------------------------------------------------------------------
[52]	177	; DisplayContext_PrepareOffScreenBufferInESBXwithLengthInCX
[48]	178	; Parameters:
[52]	179	; CX: Off screen buffer length in characters
	180	; ES:BX: Ptr to off screen buffer
[48]	181	; Returns:
	182	; Nothing
	183	; Corrupts registers:
[52]	184	; AX, DI
[48]	185	;--------------------------------------------------------------------
[592]	186	%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS
[369]	187	ALIGN DISPLAY_JUMP_ALIGN
[52]	188	DisplayContext_PrepareOffScreenBufferInESBXwithLengthInCX:
[48]	189	push ds
	190
	191	LOAD_BDA_SEGMENT_TO ds, di
	192	xchg ax, bx
	193	mov bx, es
	194	call DisplayContext_SetCharacterPointerFromBXAX ; ES:DI now has the pointer
	195
	196	mov bl, ATTRIBUTES_NOT_USED
	197	mov ax, BUFFER_OUTPUT_WITH_CHAR_ONLY
	198	call DisplayContext_SetCharOutputFunctionFromAXwithAttribFlagInBL
[52]	199	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam], cx
[48]	200
	201	mov bx, di
	202	pop ds
	203	ret
[592]	204	%endif ; EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS
[48]	205
	206
	207	;--------------------------------------------------------------------
[41]	208	; DisplayContext_SetCharacterPointerFromBXAX
	209	; Parameters:
	210	; BX:AX: Ptr to destination for next character to output
	211	; DS: BDA segment (zero)
	212	; Returns:
[48]	213	; ES:DI: Pointer that was in BX:AX
[41]	214	; Corrupts registers:
	215	; AX
	216	;--------------------------------------------------------------------
[592]	217	%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS
[369]	218	ALIGN DISPLAY_JUMP_ALIGN
[41]	219	DisplayContext_SetCharacterPointerFromBXAX:
	220	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], ax
	221	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition+2], bx
	222	xchg di, ax
	223	mov es, bx
	224	ret
[133]	225	%endif
[41]	226
	227
	228	;--------------------------------------------------------------------
	229	; DisplayContext_GetCharacterPointerToBXAX
	230	; Parameters:
	231	; DS: BDA segment (zero)
	232	; Returns:
	233	; BX:AX: Ptr to destination for next character to output
	234	; Corrupts registers:
	235	; Nothing
	236	;--------------------------------------------------------------------
[592]	237	%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_BIOSDRVS
[369]	238	ALIGN DISPLAY_JUMP_ALIGN
[41]	239	DisplayContext_GetCharacterPointerToBXAX:
	240	mov ax, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition]
	241	mov bx, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition+2]
	242	ret
[133]	243	%endif
[41]	244
	245
[592]	246	%ifdef EXCLUDE_FROM_XUB
[491]	247	%ifndef MODULE_BOOT_MENU
	248	%define EXCLUDE
	249	%endif
	250	%endif
[41]	251	;--------------------------------------------------------------------
[45]	252	; DisplayContext_SetCharOutputFunctionFromAXwithAttribFlagInBL
[41]	253	; Parameters:
	254	; AX: Offset to character output function
[45]	255	; BL: Attribute Flag
[41]	256	; DS: BDA segment (zero)
	257	; Returns:
	258	; Nothing
	259	; Corrupts registers:
[50]	260	; BL
[41]	261	;--------------------------------------------------------------------
[491]	262	%ifndef EXCLUDE ; 1 of 3
[369]	263	ALIGN DISPLAY_JUMP_ALIGN
[45]	264	DisplayContext_SetCharOutputFunctionFromAXwithAttribFlagInBL:
[50]	265	and bl, FLG_CONTEXT_ATTRIBUTES
	266	and BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], ~FLG_CONTEXT_ATTRIBUTES
	267	or [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], bl
[41]	268	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fnCharOut], ax
	269	ret
[491]	270	%endif
[41]	271
[489]	272
[41]	273	;--------------------------------------------------------------------
	274	; DisplayContext_SetCharacterAttributeFromAL
	275	; Parameters:
	276	; AL: Character attribute
	277	; DS: BDA segment (zero)
	278	; Returns:
	279	; Nothing
	280	; Corrupts registers:
	281	; Nothing
	282	;--------------------------------------------------------------------
[491]	283	%ifndef EXCLUDE ; 2 of 3
[592]	284	%ifndef EXCLUDE_FROM_BIOSDRVS
[369]	285	ALIGN DISPLAY_JUMP_ALIGN
[41]	286	DisplayContext_SetCharacterAttributeFromAL:
	287	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute], al
	288	ret
[491]	289	%endif
[592]	290	%endif
[41]	291
	292
	293	;--------------------------------------------------------------------
	294	; DisplayContext_SetCharacterOutputParameterFromAX
	295	; Parameters:
	296	; AX: Parameter for Character Output function
	297	; DS: BDA segment (zero)
	298	; Returns:
	299	; Nothing
	300	; Corrupts registers:
	301	; Nothing
	302	;--------------------------------------------------------------------
[491]	303	%ifndef EXCLUDE ; 3 of 3
[592]	304	%ifndef EXCLUDE_FROM_BIOSDRVS
[369]	305	ALIGN DISPLAY_JUMP_ALIGN
[41]	306	DisplayContext_SetCharacterOutputParameterFromAX:
	307	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam], ax
	308	ret
[491]	309	%endif
[592]	310	%endif
[491]	311
	312	%undef EXCLUDE
	313
	314
[41]	315	;--------------------------------------------------------------------
	316	; DisplayContext_GetCharacterOutputParameterToDX
	317	; Parameters:
	318	; DS: BDA segment (zero)
	319	; Returns:
	320	; DX: User parameter for Character Output function
	321	; Corrupts registers:
	322	; Nothing
[133]	323	;--------------------------------------------------------------------
[592]	324	%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_XTIDECFG OR EXCLUDE_FROM_BIOSDRVS
[369]	325	ALIGN DISPLAY_JUMP_ALIGN
[181]	326	DisplayContext_GetCharacterOutputParameterToDX:
	327	mov dx, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam]
	328	ret
	329	%endif
[44]	330
	331
	332	;--------------------------------------------------------------------
	333	; DisplayContext_GetCharacterOffsetToAXfromByteOffsetInAX
	334	; Parameters:
	335	; AX: Offset in bytes from some character to another
	336	; DS: BDA segment (zero)
	337	; Returns:
	338	; AX: Offset in characters from some character to another
	339	; Corrupts registers:
	340	; Nothing
[133]	341	;--------------------------------------------------------------------
[201]	342	%ifndef MODULE_STRINGS_COMPRESSED
[369]	343	ALIGN DISPLAY_JUMP_ALIGN
[44]	344	DisplayContext_GetCharacterOffsetToAXfromByteOffsetInAX:
	345	test BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], FLG_CONTEXT_ATTRIBUTES
	346	jz SHORT ReturnOffsetInAX
	347	sar ax, 1 ; BYTE count to WORD count
	348	ret
[194]	349	%endif
[44]	350
[491]	351
[44]	352	;--------------------------------------------------------------------
	353	; DisplayContext_GetByteOffsetToAXfromCharacterOffsetInAX
	354	; Parameters:
	355	; AX: Offset in characters from some character to another
	356	; DS: BDA segment (zero)
	357	; Returns:
	358	; AX: Offset in bytes from some character to another
	359	; Corrupts registers:
	360	; Nothing
[133]	361	;--------------------------------------------------------------------
[201]	362	%ifndef MODULE_STRINGS_COMPRESSED
[369]	363	ALIGN DISPLAY_JUMP_ALIGN
[44]	364	DisplayContext_GetByteOffsetToAXfromCharacterOffsetInAX:
	365	test BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bFlags], FLG_CONTEXT_ATTRIBUTES
	366	jz SHORT ReturnOffsetInAX
	367	sal ax, 1 ; WORD count to BYTE count
[369]	368	ALIGN DISPLAY_JUMP_ALIGN, ret
[44]	369	ReturnOffsetInAX:
	370	ret
[194]	371	%endif

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source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/DisplayContext.asm@ 624

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