source: xtideuniversalbios/trunk/Assembly_Library/Src/Util/Size.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: 4.7 KB
Line 
1; Project name  :   Assembly Library
2; Description   :   Functions for size calculations.
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%ifdef INCLUDE_MENU_LIBRARY
21struc BYTE_MULTIPLES
22    .B          resb    1
23    .kiB        resb    1
24    .MiB        resb    1
25    .GiB        resb    1
26    .TiB        resb    1
27endstruc
28
29; Section containing code
30SECTION .text
31
32;--------------------------------------------------------------------
33; Size_GetSizeToAXAndCharToDLfromBXDXAXwithMagnitudeInCX
34;   Parameters:
35;       BX:DX:AX:   Size in magnitude
36;       CX:         Magnitude in BYTE_MULTIPLES
37;   Returns:
38;       AX:         Size in magnitude
39;       CX:         Tenths
40;       DL:         Magnitude character:
41;                       'k' = *1024   B = kiB
42;                       'M' = *1024 kiB = MiB
43;                       'G' = *1024 MiB = GiB
44;                       'T' = *1024 GiB = TiB
45;                       'P' = *1024 TiB = PiB
46;   Corrupts registers:
47;       BX, DH
48;--------------------------------------------------------------------
49ALIGN UTIL_SIZE_JUMP_ALIGN
50Size_GetSizeToAXAndCharToDLfromBXDXAXwithMagnitudeInCX:
51%ifndef USE_186     ; If 8086/8088
52    push    di
53%endif
54    push    si
55
56ALIGN UTIL_SIZE_JUMP_ALIGN
57.MagnitudeConversionLoop:
58    ePUSH_T di, .MagnitudeConversionLoop; DI corrupted only on 8086/8088 build
59%ifdef USE_186
60    test    bx, bx                      ; Bits 32...47 in use?
61    jnz     SHORT Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX
62    test    dx, dx                      ; Bits 16...31 in use?
63    jnz     SHORT Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX
64%else ; 808x
65    mov     di, bx
66    or      di, dx
67    jnz     SHORT Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX
68%endif
69    cmp     ax, 10000                   ; 5 digits needed?
70    jae     SHORT Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX
71    add     sp, BYTE 2                  ; Clean return address from stack
72
73    ; Convert remainder to tenths
74    mov     bx, 640
75    xchg    bx, ax                      ; BX = Size, AX = (10 / 1024) * 65536
76    mul     si                          ; DX = Remainder * (10 / 1024)
77    xchg    dx, ax
78    xchg    cx, ax                      ; CX = Tenths, AX = Magnitude
79    xchg    bx, ax                      ; AX = Size, BX = Magnitude
80
81    ; Convert magnitude to character
82    mov     dl, [cs:bx+.rgbMagnitudeToChar]
83
84    pop     si
85%ifndef USE_186
86    pop     di
87%endif
88    ret
89.rgbMagnitudeToChar:    db  " kMGTP"
90
91;--------------------------------------------------------------------
92; Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX
93;   Parameters:
94;       BX:DX:AX:   Size
95;       CX:         Magnitude in BYTE_MULTIPLES (must be 254 or less)
96;   Returns:
97;       BX:DX:AX:   Size in magnitude
98;       SI:         Remainder (0...1023)
99;       CX:         Magnitude in BYTE_MULTIPLES
100;   Corrupts registers:
101;       Nothing
102;--------------------------------------------------------------------
103ALIGN UTIL_SIZE_JUMP_ALIGN
104Size_DivideSizeInBXDXAXby1024andIncrementMagnitudeInCX:
105    inc     cx                      ; Increment magnitude
106    mov     si, 1023
107    and     si, ax                  ; Remainder now in SI
108    ; Fall to Size_DivideSizeInBXDXAXby1024
109%endif ; INCLUDE_MENU_LIBRARY
110
111;--------------------------------------------------------------------
112; Size_DivideSizeInBXDXAXby1024
113;   Parameters:
114;       BX:DX:AX:   Size
115;       CX:         Must be 255 or less
116;   Returns:
117;       BX:DX:AX:   Size divided by 1024
118;   Corrupts registers:
119;       Nothing
120;--------------------------------------------------------------------
121ALIGN UTIL_SIZE_JUMP_ALIGN
122Size_DivideSizeInBXDXAXby1024:
123%ifdef USE_386
124    shrd    ax, dx, 10
125    shrd    dx, bx, 10
126    shr     bx, 10
127%else
128    push    cx
129    mov     cl, 10
130ALIGN UTIL_SIZE_JUMP_ALIGN
131.ShiftLoop:
132    call    Size_DivideBXDXAXbyTwo
133    loop    .ShiftLoop
134    pop     cx
135%endif
136    ret
137
138;--------------------------------------------------------------------
139; Size_ConvertSectorCountInBXDXAXtoKiB
140; Size_DivideBXDXAXbyTwo
141;   Parameters:
142;       BX:DX:AX:   Total sector count
143;   Returns:
144;       BX:DX:AX:   Total size in kiB
145;       CF:         Remainder from division
146;   Corrupts registers:
147;       Nothing
148;--------------------------------------------------------------------
149%ifdef EXCLUDE_FROM_XUB
150    %ifdef USE_386
151        %define EXCLUDE
152    %endif
153    %ifdef MODULE_BOOT_MENU
154        %undef EXCLUDE
155    %endif
156%endif
157
158%ifndef EXCLUDE
159ALIGN UTIL_SIZE_JUMP_ALIGN
160Size_ConvertSectorCountInBXDXAXtoKiB:   ; unused entrypoint ok
161Size_DivideBXDXAXbyTwo:
162    shr     bx, 1                   ; Divide sector count by 2...
163    rcr     dx, 1                   ; ...to get disk size in...
164    rcr     ax, 1                   ; ...kiB
165    ret
166%endif
167%undef EXCLUDE
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