SliTaz Repositories

     1.1 --- a/BootProg/stuff/boot16.asm	Sat May 13 11:12:29 2023 +0100
     1.2 +++ b/BootProg/stuff/boot16.asm	Sat May 13 13:34:41 2023 +0000
     1.3 @@ -23,7 +23,7 @@
     1.4  ;;   and waits for a key to be pressed, then executes the Int 19h           ;;
     1.5  ;;   instruction and lets the BIOS continue bootstrap.                      ;;
     1.6  ;;                                                                          ;;
     1.7 -;; - cpu 8086 is supported                                                  ;;
     1.8 +;; - cpu 8088 is supported                                                  ;;
     1.9  ;;                                                                          ;;
    1.10  ;;                                                                          ;;
    1.11  ;;                             Known Limitation:                            ;;
    1.12 @@ -31,7 +31,7 @@
    1.13  ;; - Need a up to date field bpbHiddenSectors to work in a partition ;      ;;
    1.14  ;;   most formatters don't update it correcly in extended partitions.       ;;
    1.15  ;;                                                                          ;;
    1.16 -;; - Partition must fit in the first 8GB disk of the for CHS reads.         ;;
    1.17 +;; - Partition must fit in the first 8GB of the disk for CHS reads.         ;;
    1.18  ;;   (or 2TB for LBA reads).                                                ;;
    1.19  ;;                                                                          ;;
    1.20  ;;                                                                          ;;
    1.21 @@ -96,7 +96,7 @@
    1.22  NullEntryCheck          equ     1               ; +2 bytes
    1.23  ReadRetry               equ     1               ; +9/+13 bytes
    1.24  LBAsupport              equ     1               ; +18 bytes
    1.25 -CHSsanityCheck          equ     1               ; +12/+16 bytes 
    1.26 +CHSsanityCheck          equ     1               ; +10/+14 bytes 
    1.27  GeometryCheck           equ     1               ; +20 bytes
    1.28  CheckAttrib             equ     0               ; +6 bytes
    1.29  WaitForKey              equ     0               ; +5 bytes
    1.30 @@ -342,6 +342,9 @@
    1.31  FAT16          equ       1
    1.32  TINYFAT16      equ       1              ; < 4072 clusters fat16 support
    1.33          push    di                      ; up to 2 * 635K / BytesPerCluster = 2540 bytes
    1.34 +%if FAT12 != 1 && FAT16 != 1
    1.35 + %error "FAT12 and/or FAT16 must be set"
    1.36 +%endif
    1.37  %if FAT12 == 1
    1.38          mov     cl, 12
    1.39  %else
    1.40 @@ -598,7 +601,6 @@
    1.41          dec     bx
    1.42          push    di
    1.43  %endif
    1.44 -        mov     si, sp
    1.45  
    1.46          xchg    ax, cx                  ; save low LBA
    1.47          xchg    ax, dx                  ; get high LBA
    1.48 @@ -606,10 +608,8 @@
    1.49          idiv    word [bx(bpbSectorsPerTrack)] ; up to 8GB disks
    1.50  
    1.51  %if CHSsanityCheck != 0
    1.52 -        inc     ax
    1.53          cmp     ax, [bx(bpbHeadsPerCylinder)]
    1.54 -        ja      CHSoverflow
    1.55 -        dec     ax
    1.56 +        jnc     CHSoverflow
    1.57  %endif
    1.58          xchg    ax, cx                  ; restore low LBA, save high LBA / SPT
    1.59          idiv    word [bx(bpbSectorsPerTrack)]
    1.60 @@ -632,13 +632,10 @@
    1.61                  ; dh = head no.
    1.62  
    1.63  %if CHSsanityCheck != 0
    1.64 - %if LBAsupport != 0
    1.65 -        or      ah, [si+8+3]            ; 8GB max, last cylinder 1023
    1.66 - %else
    1.67 -        or      ah, [si+2+3]            ; 8GB max, last cylinder 1023
    1.68 - %endif
    1.69 +        sub     ah, 1                   ; set C if cylinder < 1024 (8GB max)
    1.70 +CHSoverflow:
    1.71  %endif
    1.72 -CHSoverflow:
    1.73 +        mov     si, sp
    1.74  %if CHSsanityCheck != 0 && (ReadRetry != 0 || LBAsupport != 0)
    1.75          pushf
    1.76  %endif
    1.77 @@ -651,24 +648,21 @@
    1.78          int     13h                     ; extended read sectors (DL, DS:SI)
    1.79          jnc     ReadSectorNextSegment
    1.80  %endif
    1.81 +        mov     ax, 201h                ; al = sector count = 1
    1.82 +                                        ; ah = 2 = read function no.
    1.83  %if CHSsanityCheck != 0
    1.84   %if ReadRetry != 0 || LBAsupport != 0
    1.85          popf
    1.86          pushf
    1.87   %endif
    1.88 -        jne     SkipCHS
    1.89 +        jnc     SkipCHS
    1.90  %endif
    1.91 -
    1.92 -        mov     ax, 201h                ; al = sector count = 1
    1.93 -                                        ; ah = 2 = read function no.
    1.94          int     13h                     ; read sectors (AL, CX, DX, ES:BX)
    1.95 -
    1.96          jnc     ReadSectorNextSegment
    1.97  SkipCHS:
    1.98  %if ReadRetry != 0
    1.99          cbw                             ; ah = 0 = reset function
   1.100          int     13h                     ; reset drive (DL)
   1.101 -
   1.102          dec     di
   1.103          jnz     ReadSectorRetry         ; up to 15 extra attempt
   1.104  %endif

     2.1 --- a/BootProg/stuff/boot32.asm	Sat May 13 11:12:29 2023 +0100
     2.2 +++ b/BootProg/stuff/boot32.asm	Sat May 13 13:34:41 2023 +0000
     2.3 @@ -90,7 +90,7 @@
     2.4  ExtraBootSector         equ     1
     2.5  ClusterMask             equ     1               ; +9 bytes
     2.6  NullEntryCheck          equ     1               ; +5 bytes
     2.7 -CheckAttrib             equ     1               ; +6 bytes
     2.8 +CheckAttrib             equ     0               ; +6 bytes
     2.9  NonMirroredFATs         equ     1               ; +20 bytes
    2.10  ReadRetry               equ     1               ; +6/7 bytes
    2.11  LBA48bits               equ     1               ; +10 bytes
    2.12 @@ -601,12 +601,12 @@
    2.13          jnc     ReadSuccess             ; CF = 0 if no error
    2.14  
    2.15  %if CHSsupport != 0
    2.16 +        mov     ax, 201h                ; al = sector count = 1
    2.17 +                                        ; ah = 2 = read function no.
    2.18   %if CHSsanityCheck != 0
    2.19          cmp     eax, 0FFFFh             ; max cylinder = 1023
    2.20          ja      SkipCHS
    2.21   %endif
    2.22 -        mov     ax, 201h                ; al = sector count = 1
    2.23 -                                        ; ah = 2 = read function no.
    2.24          int     13h                     ; read sectors (AL, CX, DX, ES:BX)
    2.25  
    2.26          jnc     ReadSuccess             ; CF = 0 if no error