source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/DisplayCharOut.asm@ 594

Last change on this file since 594 was 589, checked in by Krister Nordvall, 8 years ago

Changes:

  • BIOS: Fixed a purely cosmetic bug from r542 where, in builds containing MODULE_EBIOS, the boot menu would display an incorrect drive size (0.4 kB with MODULE_STRINGS_COMPRESSED or 0.5 kB without) for old drives with no support for LBA.
  • Fixed a bug from r392 where Vision_DetectAndReturnIDinAXandPortInDXifControllerPresent would return the ID in AL instead of AH (if DANGEROUS_DETECTION had been defined).
  • Fixed a bug from r587 in AdvAtaInit.asm that would prevent detection of QDI Vision controllers.
  • Also changed how the QDI Vision IDs are defined (removed the need for shifting) to avoid confusion. This fixed a potential bug from r587 in AdvAtaInit.asm where some IDs were not being shifted.
  • Fixed a bug in PDC20x30.asm from r587 where GetPdcIDtoAX would not return with the IDE base port in DX so DisablePdcProgrammingMode would fail.
  • Made some changes to ModuleDependency.inc and other files so that MODULE_ADVANCED_ATA now requires USE_386. Consequently it is no longer included in the regular AT-builds, only in the 386_8k-build.
  • Moved the UNROLL_SECTORS_IN_CX_TO_xWORDS macros from IDE_8bit.inc to IdeIO.inc which means it's now possible to build a BIOS without MODULE_8BIT_IDE.
  • XTIDECFG: Added a minimum DOS version check (since it needs DOS version 2+) to allow the program to quit gracefully in the unlikely scenario where someone tries to run it under DOS version 1.
  • Made some changes to Drive.asm to improve drive enumeration. The old method using GET_DOS_DRIVE_PARAMETER_BLOCK_FOR_SPECIFIC_DRIVE worked well in Windows XP but not in Windows 98 SE (in Windows or in DOS mode). The two problems were; 1) The function call would access the drives which on single floppy drive systems would cause Windows to swap between A: and B: (throwing a blue screen asking the user to insert a disk etc). 2) Only floppy drives and FAT16 drives would be available in the list of drives, no FAT32/optical/network drives.
  • Improved code in IdeControllerMenu.asm so that the default port addresses for all IDE interfaces are now restored when (re-)selecting the (same) type of IDE device.
  • Also made it impossible to select a device type unless the required module is included in the loaded BIOS.
  • The version check done when loading a BIOS now uses the FLASH_SIGNATURE definition from Version.inc. Any changes affecting RomVars now only requires updating that definition. This means that changes to RomVars must be implemented in both the BIOS and XTIDECFG before being committed to the repository.
  • Added a compatibility fix for 3Com 3C503 cards to the ROM checksumming code in Buffers.asm (Buffers_GenerateChecksum).
  • SerDrive: Made some minor changes to file names and paths to improve compatibility with case sensitive environments.
  • BIOSDRVS: Made a minor size optimization which as a side effect also makes it compatible with all DOS versions including DOS version 1.
  • Library: Renamed the WAIT_RETRACE_IF_NECESSARY_THEN macro to CALL_WAIT_FOR_RETRACE_IF_NECESSARY_THEN and made a tail-call-optimized version of it (JMP_WAIT_FOR_RETRACE_IF_NECESSARY_THEN).
  • A speed optimization to the eRCL_IM macro for 386 and higher. This change breaks emulation in the sense that the macro will fail when given a memory operand as the first parameter.
  • Other minor optimizations and fixes.
File size: 4.2 KB
Line 
1; Project name : Assembly Library
2; Description : Functions for outputting characters to video memory.
3; These functions are meant to be called by Display_CharacterFromAL
4; and Display_RepeatCharacterFromAL using function pointer
5; stored in DISPLAY_CONTEXT.
6
7;
8; XTIDE Universal BIOS and Associated Tools
9; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
10;
11; This program is free software; you can redistribute it and/or modify
12; it under the terms of the GNU General Public License as published by
13; the Free Software Foundation; either version 2 of the License, or
14; (at your option) any later version.
15;
16; This program is distributed in the hope that it will be useful,
17; but WITHOUT ANY WARRANTY; without even the implied warranty of
18; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19; GNU General Public License for more details.
20; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
21;
22
23; Section containing code
24SECTION .text
25
26;--------------------------------------------------------------------
27; DisplayCharOut_TeletypeOutputWithAttribute
28; DisplayCharOut_TeletypeOutput
29; Parameters:
30; AL: Character to output
31; AH: Attribute to output
32; DS: BDA segment (zero)
33; ES:DI: Ptr to video memory where to output
34; Returns:
35; DI: Incremented for next character
36; Corrupts registers:
37; AX, DX
38;--------------------------------------------------------------------
39ALIGN DISPLAY_JUMP_ALIGN
40DisplayCharOut_TeletypeOutputWithAttribute:
41 cmp al, ' ' ; Printable character?
42 jb SHORT DisplayCharOut_BiosTeletypeOutput
43 JMP_WAIT_FOR_RETRACE_IF_NECESSARY_THEN stosw
44
45ALIGN DISPLAY_JUMP_ALIGN
46DisplayCharOut_TeletypeOutput:
47 cmp al, ' ' ; Printable character?
48 jae SHORT DisplayCharOut_Character
49 ; Fall to DisplayCharOut_BiosTeletypeOutput
50
51;--------------------------------------------------------------------
52; DisplayCharOut_BiosTeletypeOutput
53; Parameters:
54; AL: Control character
55; DS: BDA segment (zero)
56; ES:DI: Ptr to video memory where to output
57; Returns:
58; DI: Incremented for next character
59; Corrupts registers:
60; AX, DX
61;--------------------------------------------------------------------
62ALIGN DISPLAY_JUMP_ALIGN
63DisplayCharOut_BiosTeletypeOutput:
64 push ax
65 call DisplayCursor_SynchronizeCoordinatesToHardware
66 pop ax
67
68 ; Output character with BIOS
69 push bx
70 mov ah, TELETYPE_OUTPUT
71 mov bh, [VIDEO_BDA.bActivePage]
72 int BIOS_VIDEO_INTERRUPT_10h
73 pop bx
74
75 call DisplayCursor_GetHardwareCoordinatesToAX
76 jmp DisplayCursor_SetCoordinatesFromAX
77
78
79;--------------------------------------------------------------------
80; DisplayCharOut_Attribute
81; DisplayCharOut_Character
82; DisplayCharOut_CharacterWithAttribute
83; Parameters:
84; AL: Character to output
85; AH: Attribute to output
86; DS: BDA segment (zero)
87; ES:DI: Ptr to video memory where to output
88; Returns:
89; DI: Incremented for next character
90; Corrupts registers:
91; AX, DX
92;--------------------------------------------------------------------
93ALIGN DISPLAY_JUMP_ALIGN
94DisplayCharOut_Attribute:
95 xchg al, ah ; Swap character and attribute
96 inc di ; Skip character
97 JMP_WAIT_FOR_RETRACE_IF_NECESSARY_THEN stosb
98
99ALIGN DISPLAY_JUMP_ALIGN
100DisplayCharOut_Character:
101 CALL_WAIT_FOR_RETRACE_IF_NECESSARY_THEN stosb
102 inc di ; Skip attribute
103 ret
104
105ALIGN DISPLAY_JUMP_ALIGN
106DisplayCharOut_CharacterWithAttribute:
107 JMP_WAIT_FOR_RETRACE_IF_NECESSARY_THEN stosw
108
109
110;--------------------------------------------------------------------
111; DisplayCharOut_WriteCharacterToBuffer
112; Parameters:
113; AL: Character to output
114; DS: BDA segment (zero)
115; ES:DI: Ptr to destination string buffer
116; DISPLAY_CONTEXT.wCharOutParam: Characters left in buffer
117; Returns:
118; ES:DI: Updated for next character
119; Corrupts registers:
120; AX, DX
121;--------------------------------------------------------------------
122ALIGN DISPLAY_JUMP_ALIGN
123DisplayCharOut_WriteCharacterToBuffer:
124 cmp WORD [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam], BYTE 0
125 je SHORT .BufferFull
126 stosb
127 dec WORD [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam]
128.BufferFull:
129 ret
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