| 0,0 → 1,206 |
|---|
| ; System function 58, subfunctions 1xx |
| ; diamond, 2006 |
| |
| iglobal |
| ; in this table names must be in lowercase |
| rootdirs: |
| db 2,'rd' |
| dd fs_OnRamdisk |
| db 7,'ramdisk' |
| dd fs_OnRamdisk |
| db 2,'fd' |
| dd fs_OnFloppy |
| db 10,'floppydisk' |
| dd fs_OnFloppy |
| db 3,'hd0' |
| dd fs_OnHd0 |
| db 3,'hd1' |
| dd fs_OnHd1 |
| db 3,'hd2' |
| dd fs_OnHd2 |
| db 3,'hd3' |
| dd fs_OnHd3 |
| db 0 |
| endg |
| |
| file_system_lfn: |
| ; in: eax->fileinfo block |
| ; operation codes: |
| ; 0x100 : read file |
| ; 0x101 : rewrite file - not implemented yet |
| ; 0x102 : delete file - not implemented yet |
| ; 0x103 : write/append to file - not implemented yet |
| ; 0x104 : create directory - not implemented yet |
| ; 0x105 : rename file/directory - not implemented yet |
| ; 0x106 : get file attributes structure - not implemented yet |
| ; 0x107 : start application - not implemented yet |
| ; 0x108 : find file with mask - not implemented yet |
| |
| ; parse file name |
| xchg ebx, eax |
| lea esi, [ebx+20] |
| lodsb |
| cmp al, '/' |
| jz @f |
| .notfound: |
| mov dword [esp+36], 5 ; file not found |
| ret |
| @@: |
| cmp byte [esi], 0 |
| jz .rootdir |
| mov edi, rootdirs-4 |
| xor ecx, ecx |
| push esi |
| .scan1: |
| pop esi |
| add edi, ecx |
| scasd |
| mov cl, byte [edi] |
| jecxz .notfound |
| inc edi |
| push esi |
| @@: |
| lodsb |
| or al, 20h |
| scasb |
| loopz @b |
| jnz .scan1 |
| pop eax |
| lodsb |
| cmp al, '/' |
| jz .found1 |
| test al, al |
| jnz .scan1 |
| ; directory /xxx |
| .maindir: |
| ; directory / |
| .rootdir: |
| mov dword [esp+36], 10 ; access denied |
| ret |
| |
| .found1: |
| cmp byte [esi], 0 |
| jz .maindir |
| mov ebp, dword [edi] ; handler for this device |
| ; read partition number |
| xor ecx, ecx |
| xor eax, eax |
| @@: |
| lodsb |
| cmp al, '/' |
| jz .done1 |
| test al, al |
| jz .done1 |
| sub al, '0' |
| cmp al, 9 |
| ja .notfound |
| imul ecx, 10 |
| add ecx, eax |
| jmp @b |
| .done1: |
| test ecx, ecx |
| jz .notfound |
| test al, al |
| jnz @f |
| dec esi |
| @@: |
| ; now ebp contains handler address, ecx - partition number, esi points to ASCIIZ string - rest of name |
| jmp ebp |
| |
| ; handlers for devices |
| ; in: ecx = partition number |
| ; esi -> relative (for device) name |
| ; ebx -> fileinfo |
| ; out: [esp+36]=image of eax, [esp+24]=image of ebx |
| |
| fs_OnRamdisk: |
| cmp ecx, 1 |
| jnz file_system_lfn.notfound |
| movzx eax, byte [ebx] |
| test eax, eax |
| jnz .not_impl |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| add ebx, 4 |
| call dword [fs_RamdiskServices + eax*4] |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| .not_impl: |
| mov dword [esp+36], 2 ; not implemented |
| ret |
| |
| fs_RamdiskServices: |
| dd fs_RamdiskRead |
| |
| fs_OnFloppy: |
| cmp ecx, 2 |
| ja file_system_lfn.notfound |
| movzx eax, byte [ebx] |
| test eax, eax |
| jnz fs_OnRamdisk.not_impl |
| call reserve_flp |
| mov [flp_number], cl |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| add ebx, 4 |
| call dword [fs_FloppyServices + eax*4] |
| and [flp_status], 0 |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| |
| fs_FloppyServices: |
| dd fs_FloppyRead |
| |
| fs_OnHd0: |
| call reserve_hd1 |
| mov [hdbase], 0x1F0 |
| mov [hdid], 0 |
| push 1 |
| jmp fs_OnHd |
| fs_OnHd1: |
| call reserve_hd1 |
| mov [hdbase], 0x1F0 |
| mov [hdid], 0x10 |
| push 2 |
| jmp fs_OnHd |
| fs_OnHd2: |
| call reserve_hd1 |
| mov [hdbase], 0x170 |
| mov [hdid], 0 |
| push 3 |
| jmp fs_OnHd |
| fs_OnHd3: |
| call reserve_hd1 |
| mov [hdbase], 0x170 |
| mov [hdid], 0x10 |
| push 4 |
| fs_OnHd: |
| pop eax |
| mov [hdpos], eax |
| cmp ecx, [0x40001+eax] |
| jbe @f |
| and [hd1_status], 0 |
| mov dword [esp+36], 5 ; not found |
| ret |
| @@: |
| mov [fat32part], ecx |
| push ebx esi |
| call choice_necessity_partition_1 |
| pop esi ebx |
| mov ecx, [ebx+12] |
| mov edx, [ebx+16] |
| add edx, std_application_base_address |
| movzx eax, byte [ebx] |
| add ebx, 4 |
| call dword [fs_HdServices + eax*4] |
| and [hd1_status], 0 |
| mov [esp+36], eax |
| mov [esp+24], ebx |
| ret |
| |
| fs_HdServices: |
| dd fs_HdRead |