Changeset 491 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeIO.asm


Ignore:
Timestamp:
Dec 15, 2012, 2:46:29 PM (11 years ago)
Author:
krille_n_@…
google:author:
krille_n_@hotmail.com
Message:

Changes:

  • Added a new define (USE_UNDOC_INTEL) that enables optimizations possible by using undocumented instructions available on all Intel processors and truly compatible clones. AFAIK the only exceptions are the NEC V-series and the Sony CXQ70108 processors so this option should be safe for use on the AT builds.
  • Building BIOSDRVS or the BIOS without MODULE_STRINGS_COMPRESSED would fail due to the recent code exclusions so I changed them a bit. Also fixed the mistaken change to Main.asm
  • Changed the Tandy specific info in Configuration_FullMode.txt so it matches the info in the Wiki.
  • Optimizations and fixes in general.
File:
1 edited

Legend:

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  • trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeIO.asm

    r473 r491  
    5353IdeIO_InputToALfromIdeRegisterInDL:
    5454    xor     dh, dh  ; IDE Register index now in DX
    55 
     55    mov     bx, dx  ; and BX
    5656    mov     al, [di+DPT_ATA.bDevice]
    5757    cmp     al, DEVICE_8BIT_XTIDE_REV2
    … …  
    6363
    6464.InputToALfromMemoryMappedRegisterInDX:
    65     mov     bx, JRIDE_COMMAND_BLOCK_REGISTER_WINDOW_OFFSET
    66     add     bx, dx
    6765    push    ds
    6866    mov     ds, [di+DPT.wBasePort]  ; Segment for JR-IDE/ISA
    69     mov     al, [bx]
     67    mov     al, [bx+JRIDE_COMMAND_BLOCK_REGISTER_WINDOW_OFFSET]
    7068    pop     ds
    7169    ret
    7270
    7371.ReverseA0andA3fromRegisterIndexInDX:
    74     mov     bx, dx
    7572    mov     dl, [cs:bx+g_rgbSwapA0andA3fromIdeRegisterIndex]
    7673    SKIP2B  bx  ; Skip shl dx, 1
    7774
    7875.ShlRegisterIndexInDX:
    79     shl     dx, 1
     76    eSHL_IM dx, 1
    8077    ; Fall to .InputToALfromRegisterInDX
    8178
    … …  
    116113.ShlRegisterIndexInDX:
    117114    add     dl, OFFSET_TO_CONTROL_BLOCK_REGISTERS
    118     shl     dx, 1
     115    eSHL_IM dx, 1
    119116    jmp     SHORT OutputALtoRegisterInDX
    120117
    … …  
    164161
    165162.ShlRegisterIndexInDX:
    166     shl     dx, 1
     163    eSHL_IM dx, 1
    167164    ; Fall to OutputALtoRegisterInDX
    168165
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