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

Last change on this file since 594 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: 2.8 KB
RevLine 
[41]1; Project name : Assembly Library
2; Description : Functions for managing display page.
3
[376]4;
[526]5; XTIDE Universal BIOS and Associated Tools
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.
[526]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
[526]16; GNU General Public License for more details.
[376]17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
[41]20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; DisplayPage_SetFromAL
25; Parameters:
26; AL: New display page
27; DS: BDA segment (zero)
28; Returns:
29; Nothing
30; Corrupts registers:
31; AX, DX
32;--------------------------------------------------------------------
[592]33%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_XTIDECFG OR EXCLUDE_FROM_BIOSDRVS
[369]34ALIGN DISPLAY_JUMP_ALIGN
[41]35DisplayPage_SetFromAL:
36 xor ah, ah
37 mul WORD [VIDEO_BDA.wBytesPerPage] ; AX = Offset to page
38 mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], ax
39 ret
[194]40%endif
[41]41
42
[592]43%ifdef EXCLUDE_FROM_XUB
[492]44 %define EXCLUDE
[589]45 %ifdef MODULE_HOTKEYS OR MODULE_BOOT_MENU
[492]46 %undef EXCLUDE
47 %endif
48%endif
49
[592]50%ifndef EXCLUDE OR EXCLUDE_FROM_BIOSDRVS
[41]51;--------------------------------------------------------------------
52; DisplayPage_GetColumnsToALandRowsToAH
53; Parameters:
54; DS: BDA segment (zero)
55; Returns:
56; AL: Number of columns in selected text mode
57; AH: Number of rows in selected text mode
58; Corrupts registers:
59; Nothing
60;--------------------------------------------------------------------
[369]61ALIGN DISPLAY_JUMP_ALIGN
[41]62DisplayPage_GetColumnsToALandRowsToAH:
63 mov al, [VIDEO_BDA.wColumns] ; 40 or 80
64 mov ah, 25 ; Always 25 rows on standard text modes
65 ret
[492]66%endif
[526]67%undef EXCLUDE
[41]68
69;--------------------------------------------------------------------
70; DisplayPage_SynchronizeToHardware
71; Parameters:
72; DS: BDA segment (zero)
73; Returns:
74; Nothing
75; Corrupts registers:
76; AX, DX
77;--------------------------------------------------------------------
[369]78ALIGN DISPLAY_JUMP_ALIGN
[41]79DisplayPage_SynchronizeToHardware:
80 xor dx, dx
81 mov ax, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition]
82 div WORD [VIDEO_BDA.wBytesPerPage] ; AX = Page
83
84 cmp al, [VIDEO_BDA.bActivePage]
85 je SHORT .Return ; Same page, no need to synchronize
86 mov ah, SELECT_ACTIVE_DISPLAY_PAGE
87 int BIOS_VIDEO_INTERRUPT_10h
88.Return:
89 ret
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