SliTaz Repositories

     1.1 --- a/BootProg/stuff/boot32.asm	Wed Sep 14 18:33:54 2022 +0000
     1.2 +++ b/BootProg/stuff/boot32.asm	Thu Sep 22 07:58:57 2022 +0000
     1.3 @@ -60,7 +60,7 @@
     1.4  ;;                   Boot Image Startup (register values):                  ;;
     1.5  ;;                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                  ;;
     1.6  ;;  ax = 0ffffh (both FCB in the PSP don't have a valid drive identifier),  ;;
     1.7 -;;  bx = cx = 0, dl = BIOS boot drive number (e.g. 0, 80H)                  ;;
     1.8 +;;  bx = 0, dl = BIOS boot drive number (e.g. 0, 80H)                       ;;
     1.9  ;;  cs:ip = program entry point                                             ;;
    1.10  ;;  ss:sp = program stack (don't confuse with boot sector's stack)          ;;
    1.11  ;;  COM program defaults: cs = ds = es = ss = 50h, sp = 0, ip = 100h        ;;
    1.12 @@ -234,7 +234,7 @@
    1.13          je      ErrFind                 ; end of root directory (NULL entry found)
    1.14  %endif
    1.15          pusha
    1.16 -        mov     cl, 11
    1.17 +        mov     cl, NameLength
    1.18          mov     si, ProgramName         ; ds:si -> program name
    1.19          repe    cmpsb
    1.20          je      FindNameFound
    1.21 @@ -289,8 +289,8 @@
    1.22  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
    1.23  ;; Setup and run a .COM program ;;
    1.24  ;; Set CS=DS=ES=SS SP=0 IP=100h ;;
    1.25 -;; AX=0ffffh BX=0 CX=0 DX=drive ;;
    1.26 -;; and cmdline=void             ;;
    1.27 +;; AX=0ffffh BX=0 DX=drive and  ;;
    1.28 +;; cmdline=void                 ;;
    1.29  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
    1.30  
    1.31          mov     di, 100h                ; ip
    1.32 @@ -304,7 +304,7 @@
    1.33  ;; Relocate, setup and run a .EXE program     ;;
    1.34  ;; Set CS:IP, SS:SP, DS, ES and AX according  ;;
    1.35  ;; to wiki.osdev.org/MZ#Initial_Program_State ;;
    1.36 -;; AX=0ffffh BX=0 CX=0 DX=drive cmdline=void  ;;
    1.37 +;; AX=0ffffh BX=0 DX=drive cmdline=void       ;;
    1.38  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
    1.39  
    1.40  ReloCycle:
    1.41 @@ -387,7 +387,7 @@
    1.42          mul     dword [bx(bsSectorsPerFAT32)]
    1.43  
    1.44          xchg    eax, edi
    1.45 -        movzx   ecx, byte [bx(bpbSectorsPerCluster)]
    1.46 +        movzx   ecx, byte [bx(bpbSectorsPerCluster)] ; 8..128
    1.47          mul     ecx                             ; edx:eax=sector number in data area
    1.48          add     eax, edi
    1.49  
    1.50 @@ -400,7 +400,7 @@
    1.51  %if LBA48bits != 0
    1.52          adc     word [bx(HiLBA)], bx
    1.53  %endif
    1.54 -        mov     dx, word [bx(bpbReservedSectors)]
    1.55 +        mov     dx, [bx(bpbReservedSectors)]
    1.56  
    1.57  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
    1.58  ;; Reads a sector using BIOS Int 13h fn 42h ;;
    1.59 @@ -468,7 +468,7 @@
    1.60          mov     dl, [bx(DriveNumber)]   ; restore BIOS boot drive number
    1.61  %endif
    1.62  
    1.63 -ReadSectorLBARetry:
    1.64 +ReadSectorRetry:
    1.65          mov     si, sp
    1.66          mov     ah, 42h                 ; ah = 42h = extended read function no.
    1.67          int     13h                     ; extended read sectors (DL, DS:SI)
    1.68 @@ -490,7 +490,7 @@
    1.69          int     13h                     ; reset drive (DL)
    1.70  
    1.71          dec     bp
    1.72 -        jnz     ReadSectorLBARetry
    1.73 +        jnz     ReadSectorRetry
    1.74  %endif
    1.75  
    1.76          call    Error
    1.77 @@ -543,6 +543,7 @@
    1.78  
    1.79  ProgramName     db      "STARTUP BIN"   ; name and extension each must be
    1.80                  times (510-($-$$)) db ' ' ; padded with spaces (11 bytes total)
    1.81 +NameLength      equ     $-ProgramName
    1.82  
    1.83  ;;;;;;;;;;;;;;;;;;;;;;;;;;
    1.84  ;; End of the sector ID ;;