Changeset 531 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization


Ignore:
Timestamp:
Mar 30, 2013, 6:50:48 PM (12 years ago)
Author:
krille_n_@…
google:author:
krille_n_@hotmail.com
Message:

Changes:

  • A few minor optimizations.
File:
1 edited

Legend:

Unmodified
Added
Removed
  • trunk/XTIDE_Universal_BIOS/Src/Initialization/FloppyDrive.asm

    r530 r531  
    6464
    6565%else ; if XT build
    66     cmp     WORD [es:BIOS_DISKETTE_INTERRUPT_40h*4+2], 0C000h   ; Any ROM segment? (set CF if not)
     66    cmp     BYTE [es:BIOS_DISKETTE_INTERRUPT_40h*4+3], 0C0h ; Any ROM segment? (set CF if not)
    6767%endif ; USE_AT
    6868    cmc
     
    134134    js      .UseBIOSorBDA               ; We didn't add in any drives, counts here are not valid
    135135
    136     adc     al ,1                       ; adds in the drive count bit, and adds 1 for count vs. 0-index,
     136    adc     al, 1                       ; adds in the drive count bit, and adds 1 for count vs. 0-index,
    137137    jmp     .FinishCalc                 ; need to clear AH on the way out, and add in minimum drive numbers
    138138
     
    175175    cwd                             ; Floppy Drive 00h
    176176    int     BIOS_DISKETTE_INTERRUPT_40h
    177     mov     al, dl                  ; Number of Floppy Drives to AL
     177    xchg    dx, ax                  ; Number of Floppy Drives to AL
    178178
    179179    pop     dx
     
    187187    LOAD_BDA_SEGMENT_TO es, ax
    188188    mov     al, [es:BDA.wEquipment] ; Load Equipment WORD low byte
     189
     190%ifdef USE_UNDOC_INTEL
     191    and     al, 0C1h
     192    eAAM    64
     193%else
    189194    mov     ah, al                  ; Copy it to AH
    190195    and     ax, 0C001h              ; Leave bits 15..14 and 0
    191196    eROL_IM ah, 2                   ; EW low byte bits 7..6 to 1..0
     197%endif ; USE_UNDOC_INTEL
     198
    192199    add     al, ah                  ; AL = Floppy Drive count
    193 %endif
     200%endif ; USE_AT
    194201
    195202    pop     es
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