source: xtideuniversalbios/trunk/Assembly_Library/Src/Util/Registers.asm @ 592

Last change on this file since 592 was 592, checked in by krille_n_, 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: 3.2 KB
Line 
1; Project name  :   Assembly Library
2; Description   :   Functions for register operations.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
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.
12;
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
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; Registers_ExchangeDSSIwithESDI
25;   Parameters
26;       Nothing
27;   Returns:
28;       DS:SI and ES:DI are exchanged.
29;   Corrupts registers:
30;       Nothing
31;--------------------------------------------------------------------
32ALIGN JUMP_ALIGN
33Registers_ExchangeDSSIwithESDI:
34    push    ds
35    push    es
36    pop     ds
37    pop     es
38    xchg    si, di
39    ret
40
41
42;--------------------------------------------------------------------
43; Registers_CopySSBPtoESDI
44; Registers_CopySSBPtoDSSI
45; Registers_CopyDSSItoESDI
46; Registers_CopyESDItoDSSI
47;   Parameters
48;       Nothing
49;   Returns:
50;       Copies farm pointer to different segment/pointer register pair
51;   Corrupts registers:
52;       Nothing
53;--------------------------------------------------------------------
54%ifdef INCLUDE_MENU_LIBRARY
55ALIGN JUMP_ALIGN
56Registers_CopySSBPtoESDI:
57    COPY_SSBP_TO_ESDI
58    ret
59%endif
60
61%ifndef EXCLUDE_FROM_XUB
62ALIGN JUMP_ALIGN
63Registers_CopySSBPtoDSSI:
64    COPY_SSBP_TO_DSSI
65    ret
66
67ALIGN JUMP_ALIGN
68Registers_CopyDSSItoESDI:
69    COPY_DSSI_TO_ESDI
70    ret
71
72ALIGN JUMP_ALIGN
73Registers_CopyESDItoDSSI:
74    COPY_ESDI_to_DSSI
75    ret
76%endif
77
78
79;--------------------------------------------------------------------
80; Registers_NormalizeESSI
81; Registers_NormalizeESDI
82;   Parameters
83;       DS:SI or ES:DI: Ptr to normalize
84;   Returns:
85;       DS:SI or ES:DI: Normalized pointer
86;   Corrupts registers:
87;       AX, CX
88;
89; Inline of NORMALIZE_FAR_POINTER so that we can share the last 2/3 of the
90; routine with Registers_NormalizeFinish.
91;
92;--------------------------------------------------------------------
93%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_XTIDECFG
94ALIGN JUMP_ALIGN
95Registers_NormalizeESSI:
96    mov         cx, si
97    and         si, BYTE 0Fh
98    jmp         SHORT Registers_NormalizeFinish
99
100ALIGN JUMP_ALIGN
101Registers_NormalizeESDI:
102    mov         cx, di
103    and         di, BYTE 0Fh
104;;; fall-through
105
106ALIGN JUMP_ALIGN
107Registers_NormalizeFinish:
108    eSHR_IM     cx, 4
109    mov         ax, es
110    add         ax, cx
111    mov         es, ax
112    ret
113%endif
114
115
116;--------------------------------------------------------------------
117; Registers_SetZFifNullPointerInDSSI (commented to save bytes)
118;   Parameters
119;       DS:SI:  Far pointer
120;   Returns:
121;       ZF:     Set if NULL pointer in DS:SI
122;   Corrupts registers:
123;       Nothing
124;--------------------------------------------------------------------
125;ALIGN JUMP_ALIGN
126;Registers_SetZFifNullPointerInDSSI:
127;   push    ax
128;   mov     ax, ds
129;   or      ax, si
130;   pop     ax
131;   ret
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