nivirx/stevia
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases 1 Wiki Activity

correct drive_num argument on read_disk_raw

Browse Source
This commit is contained in:
Elaina Claus
2024-10-14 13:18:41 -04:00
parent 933cccb88e
commit a5296bb438
2 changed files with 16 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
include/fat32/FAT32_SYS.inc
View File

@@ -39,7 +39,7 @@ InitFATDriver:
.calc_active_part:
mov bx, [partition_offset_ptr]
mov ax, [bx + 0]
mov ax, word [ds:bx]
mov dx, partition_table
add dx, ax ; dx points to the partition that was booted from
@@ -93,14 +93,14 @@ SearchFATDIR:
.load_first_dir:
mov eax, dword [fat32_state + FAT32_State_t.active_dir_cluster_32]
push dword eax ; cluster
lea ax, [dir_buffer]
mov ax, dir_buffer
push ax ; offset
xor ax, ax
push ax ; segment
call ReadFATCluster ; uint8_t ReadFATCluster(uint16_t seg, uint16_t offset, uint32_t cluster)
add sp, 0x8
lea si, [dir_buffer]
mov si, dir_buffer
jmp SearchFATDIR.empty_dir_entry
.load_next_dir:
@@ -121,7 +121,7 @@ SearchFATDIR:
mov eax, [fat32_state + FAT32_State_t.active_dir_cluster_32]
push dword eax ; cluster
lea ax, [dir_buffer]
mov ax, dir_buffer
push ax ; offset
xor ax, ax
@@ -129,7 +129,7 @@ SearchFATDIR:
call ReadFATCluster ; uint8_t ReadFATCluster(uint16_t seg, uint16_t offset, uint32_t cluster)
sub sp, 0x8
lea si, [dir_buffer]
mov si, dir_buffer
.empty_dir_entry:
; check for 0x0 in first byte, if true then there are no more files
; if true we did not find the file, we should error here
@@ -151,7 +151,7 @@ SearchFATDIR:
; if we are at the end of the buffer, then load the next buffer
add si, 0x20 ; 32 bytes
lea ax, [dir_buffer]
mov ax, dir_buffer
add ax, 0x1FF ; 512 - 1 bytes
cmp si, ax
jae SearchFATDIR.load_next_dir
@@ -169,7 +169,7 @@ SearchFATDIR:
mov cx, 0xA ; max of 11 filename length of 11 characters
; si points to the start of the current directory entry
lea di, [BootTarget_str] ; current memory location (8.3 name is at offset 0)
mov di, BootTarget_str ; current memory location (8.3 name is at offset 0)
repe cmpsb ; compare the strings
pop di
@@ -195,10 +195,8 @@ NextCluster:
__CDECL16_ENTRY
.func:
mov bx, [boot_drive_ptr]
movzx ax, byte [bx + 0]
mov byte [bp - 2], al ; save boot drive as a local for easy access
;movzx ax, byte [bx + 0] ; 67h override would probably work but this is the 16bit way to do it
;mov byte [bp - 2], al ; save boot drive as a local for easy access
movzx ax, byte [ds:bx]
mov byte [bp - 2], al ; save boot drive as a local for easy access
mov edx, dword [bp + 4]
mov si, fat32_nc_data
@@ -237,6 +235,7 @@ NextCluster:
add eax, ecx ; fat_sector + first_fat_sector
mov dword [si + FAT32_NextClusterData_t.fat_sector], eax
.load_fat_table:
__BOCHS_MAGIC_DEBUG
movzx ax, byte [bp - 2]
push ax
@@ -287,9 +286,9 @@ ClusterToLBA:
ALIGN 4, db 0x90
ReadFATCluster:
__CDECL16_ENTRY
.func:
.func:
mov bx, [boot_drive_ptr]
movzx ax, byte [bx + 0]
movzx ax, byte [ds:bx]
mov byte [bp - 2], al ; save boot drive as a local for easy access
mov dword eax, [bp + 8]