forked from KolibriOS/kolibrios
1400 lines
34 KiB
PHP
1400 lines
34 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; FAT12.INC ;;
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;; (C) 2005 Mario79, License: GPL ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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n_sector dd 0 ; temporary save for sector value
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flp_status dd 0
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clust_tmp_flp dd 0 ; used by analyze_directory and analyze_directory_to_write
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path_pointer_flp dd 0
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pointer_file_name_flp dd 0
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save_root_flag db 0
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save_flag db 0
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root_read db 0 ; 0-necessary to load root, 1-not to load root
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flp_fat db 0 ; 0-necessary to load fat, 1-not to load fat
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flp_number db 0 ; 1- Floppy A, 2-Floppy B
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old_track db 0 ; old value track
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flp_label rb 15 ; Label and ID of inserted floppy disk
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reserve_flp:
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cli
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cmp [flp_status],0
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je reserve_flp_ok
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sti
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call change_task
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jmp reserve_flp
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reserve_flp_ok:
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push eax
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mov eax,[0x3000]
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shl eax,5
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mov eax,[eax+0x3000+4]
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mov [flp_status],eax
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pop eax
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sti
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ret
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floppy_free_space:
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;---------------------------------------------
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;
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; returns free space in edi
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;
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;---------------------------------------------
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push eax ebx ecx
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call read_flp_fat
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cmp [FDC_Status],0
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jne fdc_status_error_2
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mov eax,0x282000
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xor edi,edi
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mov ecx,2847 ;1448000/512
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rdfs1_1:
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mov ebx,[eax]
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and ebx,4095
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cmp ebx,0
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jne rdfs2_1
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add edi,512
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rdfs2_1:
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add eax,2
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loop rdfs1_1
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fdc_status_error_2:
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pop ecx ebx eax
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ret
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floppy_fileread:
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;----------------------------------------------------------------
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;
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; fileread - sys floppy
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;
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; eax points to filename 11 chars - for root directory
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; ebx first wanted block ; 1+ ; if 0 then set to 1
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; ecx number of blocks to read ; 1+ ; if 0 then set to 1
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; edx mem location to return data
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; esi length of filename 12*X
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; edi pointer to path /fd/1/...... - for all files in nested directories
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;
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; ret ebx = size or 0xffffffff file not found
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; eax = 0 ok read or other = errormsg
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; 10 = access denied
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;--------------------------------------------------------------
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mov [save_flag],0
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mov [path_pointer_flp],edi
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cmp esi,0 ; return ramdisk root
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jne fr_noroot_1
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cmp ebx,224/16
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jbe fr_do_1
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mov eax,5
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mov ebx,0
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mov [flp_status],0
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ret
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fr_do_1:
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push ebx ecx edx
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call read_flp_root
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pop edx ecx ebx
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cmp [FDC_Status],0
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jne fdc_status_error_1
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mov edi,edx
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dec ebx
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shl ebx,9
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mov esi,0x8000
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add esi,ebx
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shl ecx,9
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cld
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rep movsb
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mov eax,0 ; ok read
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mov ebx,0
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mov [flp_status],0
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ret
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fdc_status_error_1:
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mov [flp_status],0
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mov eax,10
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mov ebx,-1
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ret
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fr_noroot_1:
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sub esp,32
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call expand_filename
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frfloppy_1:
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cmp ebx,0
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jne frfl5_1
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mov ebx,1
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frfl5_1:
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cmp ecx,0
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jne frfl6_1
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mov ecx,1
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frfl6_1:
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dec ebx
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push eax
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push eax ebx ecx edx esi edi
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call read_flp_fat
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cmp [FDC_Status],0
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jne fdc_status_error_3_1
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mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Head],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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call SeekTrack
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mov dh,14
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l.20_1:
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call ReadSectWithRetr
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cmp [FDC_Status],0
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jne fdc_status_error_3_1
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mov dl,16
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mov edi,0xD000
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inc [FDD_Sector]
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l.21_1:
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mov esi,eax ;Name of file we want
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mov ecx,11
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cld
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rep cmpsb ;Found the file?
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je fifound_1 ;Yes
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add ecx,21
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add edi, ecx ;Advance to next entry
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dec dl
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cmp dl,0
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jne l.21_1
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dec dh
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cmp dh,0
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jne l.20_1
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fdc_status_error_3:
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mov eax,5 ; file not found ?
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mov ebx,-1
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add esp,32+28
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mov [flp_status],0
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ret
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fdc_status_error_3_2:
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cmp [FDC_Status],0
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je fdc_status_error_3
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fdc_status_error_3_1:
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add esp,32+28
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jmp fdc_status_error_1
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fifound_1:
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mov eax,[path_pointer_flp]
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cmp [eax+36],byte 0
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je fifound_2
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add edi,0xf
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mov eax,[edi]
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and eax,65535
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mov ebx,[path_pointer_flp]
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add ebx,36
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call get_cluster_of_a_path_flp
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jc fdc_status_error_3_2
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mov ebx,[ebx-11+28] ;file size
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mov [esp+20],ebx
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mov [esp+24],ebx
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jmp fifound_3
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fifound_2:
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mov ebx,[edi-11+28] ;file size
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mov [esp+20],ebx
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mov [esp+24],ebx
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add edi,0xf
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mov eax,[edi]
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fifound_3:
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and eax,65535
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mov [n_sector],eax ;eax=cluster
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frnew_1:
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add eax,31 ;bootsector+2*fat+filenames
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cmp [esp+16],dword 0 ; wanted cluster ?
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jne frfl7_1
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call read_chs_sector
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cmp [FDC_Status],0
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jne fdc_status_error_5
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mov edi,[esp+8]
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call give_back_application_data_1
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add [esp+8],dword 512
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dec dword [esp+12] ; last wanted cluster ?
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cmp [esp+12],dword 0
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je frnoread_1
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jmp frfl8_1
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frfl7_1:
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dec dword [esp+16]
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frfl8_1:
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mov edi,[n_sector]
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shl edi,1 ;find next cluster from FAT
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add edi,0x282000
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mov eax,[edi]
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and eax,4095
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mov edi,eax
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mov [n_sector],edi
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cmp edi,4095 ;eof - cluster
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jz frnoread2_1
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cmp [esp+24],dword 512 ;eof - size
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jb frnoread_1
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sub [esp+24],dword 512
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jmp frnew_1
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read_chs_sector:
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call calculate_chs
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call ReadSectWithRetr
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ret
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frnoread2_1:
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cmp [esp+16],dword 0 ; eof without read ?
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je frnoread_1
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mov [fdc_irq_func],fdc_null
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pop edi esi edx ecx
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add esp,4
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pop ebx ; ebx <- eax : size of file
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add esp,36
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mov eax,6 ; end of file
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mov [flp_status],0
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ret
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frnoread_1:
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pop edi esi edx ecx
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add esp,4
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pop ebx ; ebx <- eax : size of file
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add esp,36
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mov eax,0
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mov [flp_status],0
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ret
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fdc_status_error_5:
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pop edi esi edx ecx
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add esp,4
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pop ebx ; ebx <- eax : size of file
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add esp,36
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jmp fdc_status_error_1
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read_flp_root:
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pusha
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call check_label
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cmp [FDC_Status],0
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jne unnecessary_root_read
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cmp [root_read],1
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je unnecessary_root_read
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mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Head],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov edi,0x8000
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call SeekTrack
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read_flp_root_1:
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call ReadSectWithRetr
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cmp [FDC_Status],0
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jne unnecessary_root_read
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push edi
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call give_back_application_data_1
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pop edi
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add edi,512
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inc [FDD_Sector]
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cmp [FDD_Sector],16
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jne read_flp_root_1
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mov [root_read],1
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unnecessary_root_read:
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popa
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ret
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read_flp_fat:
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pusha
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call check_label
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cmp [FDC_Status],0
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jne unnecessary_flp_fat
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cmp [flp_fat],1
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je unnecessary_flp_fat
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mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Head],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov edi,0x8000
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call SeekTrack
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read_flp_fat_1:
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call ReadSectWithRetr
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cmp [FDC_Status],0
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jne unnecessary_flp_fat
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push edi
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call give_back_application_data_1
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pop edi
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add edi,512
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inc [FDD_Sector]
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cmp [FDD_Sector],19
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jne read_flp_fat_1
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mov [FDD_Sector],1
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mov [FDD_Head],1
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call ReadSectWithRetr
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cmp [FDC_Status],0
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jne unnecessary_flp_fat
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call give_back_application_data_1
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call calculatefatchain_flp
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mov [root_read],0
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mov [flp_fat],1
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unnecessary_flp_fat:
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popa
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ret
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calculatefatchain_flp:
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pushad
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mov esi,0x8000
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mov edi,0x282000
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fcnew_1:
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mov eax,dword [esi]
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mov ebx,dword [esi+4]
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mov ecx,dword [esi+8]
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mov edx,ecx
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shr edx,4 ;8 ok
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shr dx,4 ;7 ok
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xor ch,ch
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shld ecx,ebx,20 ;6 ok
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shr cx,4 ;5 ok
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shld ebx,eax,12
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and ebx,0x0fffffff ;4 ok
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shr bx,4 ;3 ok
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shl eax,4
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and eax,0x0fffffff ;2 ok
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shr ax,4 ;1 ok
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mov dword [edi],eax
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add edi,4
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mov dword [edi],ebx
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add edi,4
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mov dword [edi],ecx
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add edi,4
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mov dword [edi],edx
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add edi,4
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add esi,12
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cmp edi,0x282000+2856*2 ;2849 clusters
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jnz fcnew_1
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popad
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ret
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check_label:
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pushad
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mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Head],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Sector],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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call SetUserInterrupts
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call FDDMotorON
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call RecalibrateFDD
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cmp [FDC_Status],0
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jne fdc_status_error
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call SeekTrack
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cmp [FDC_Status],0
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jne fdc_status_error
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call ReadSectWithRetr
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cmp [FDC_Status],0
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jne fdc_status_error
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mov esi,flp_label
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mov edi,0xD000+39
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mov ecx,15
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cld
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rep cmpsb
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je same_label
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mov [root_read],0
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mov [flp_fat],0
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same_label:
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mov esi,0xD000+39
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mov edi,flp_label
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mov ecx,15
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cld
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rep movsb
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popad
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ret
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fdc_status_error:
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popad
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ret
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save_flp_root:
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pusha
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call check_label
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cmp [FDC_Status],0
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jne unnecessary_root_save
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cmp [root_read],0
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je unnecessary_root_save
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mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Head],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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mov esi,0x8000
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call SeekTrack
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save_flp_root_1:
|
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push esi
|
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call take_data_from_application_1
|
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pop esi
|
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add esi,512
|
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call WriteSectWithRetr
|
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cmp [FDC_Status],0
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jne unnecessary_root_save
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inc [FDD_Sector]
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cmp [FDD_Sector],16
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jne save_flp_root_1
|
||
unnecessary_root_save:
|
||
mov [fdc_irq_func],fdc_null
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||
popa
|
||
ret
|
||
|
||
save_flp_fat:
|
||
pusha
|
||
call check_label
|
||
cmp [FDC_Status],0
|
||
jne unnecessary_flp_fat_save
|
||
cmp [flp_fat],0
|
||
je unnecessary_flp_fat_save
|
||
call restorefatchain_flp
|
||
mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Head],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov esi,0x8000
|
||
call SeekTrack
|
||
save_flp_fat_1:
|
||
push esi
|
||
call take_data_from_application_1
|
||
pop esi
|
||
add esi,512
|
||
call WriteSectWithRetr
|
||
cmp [FDC_Status],0
|
||
jne unnecessary_flp_fat_save
|
||
inc [FDD_Sector]
|
||
cmp [FDD_Sector],19
|
||
jne save_flp_fat_1
|
||
mov [FDD_Sector],1
|
||
mov [FDD_Head],1
|
||
call take_data_from_application_1
|
||
call WriteSectWithRetr
|
||
cmp [FDC_Status],0
|
||
jne unnecessary_flp_fat_save
|
||
mov [root_read],0
|
||
unnecessary_flp_fat_save:
|
||
mov [fdc_irq_func],fdc_null
|
||
popa
|
||
ret
|
||
|
||
|
||
restorefatchain_flp: ; restore fat chain
|
||
pushad
|
||
|
||
mov esi,0x282000
|
||
mov edi,0x8000
|
||
|
||
fcnew2_1:
|
||
mov eax,dword [esi]
|
||
mov ebx,dword [esi+4]
|
||
shl ax,4
|
||
shl eax,4
|
||
shl bx,4
|
||
shr ebx,4
|
||
shrd eax,ebx,8
|
||
shr ebx,8
|
||
mov dword [edi],eax
|
||
add edi,4
|
||
mov word [edi],bx
|
||
add edi,2
|
||
add esi,8
|
||
|
||
cmp edi,0x8000+0x1200 ;4274 bytes - all used FAT
|
||
jb fcnew2_1
|
||
|
||
mov esi,0x8000 ; duplicate fat chain
|
||
mov edi,0x8000+0x1200
|
||
mov ecx,0x1200/4
|
||
cld
|
||
rep movsd
|
||
|
||
popad
|
||
ret
|
||
|
||
|
||
floppy_filedelete:
|
||
;--------------------------------------------
|
||
;
|
||
; filedelete - sys floppy
|
||
; in:
|
||
; eax - filename 11 chars - for root directory
|
||
; edi pointer to path /fd/1/...... - for all files in nested directories
|
||
;
|
||
; out:
|
||
; eax - 0 = successful, 1 = file not found, 10 = access denied
|
||
;
|
||
;--------------------------------------------
|
||
mov [path_pointer_flp],edi
|
||
mov [save_flag],0
|
||
mov ebp,1 ; file not found as default
|
||
filedelete_newtry_1:
|
||
sub esp,32
|
||
call expand_filename
|
||
push eax ebx ecx edx esi edi
|
||
call read_flp_fat
|
||
cmp [FDC_Status],0
|
||
jne frnoreadd_1
|
||
mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Head],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
call SeekTrack
|
||
mov dh,14
|
||
l.20_2:
|
||
call ReadSectWithRetr
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_4
|
||
mov dl,16
|
||
mov edi,0xD000
|
||
inc [FDD_Sector]
|
||
l.21_2:
|
||
mov esi,eax ;Name of file we want
|
||
mov ecx,11
|
||
cld
|
||
rep cmpsb ;Found the file?
|
||
je fifoundd_1 ;Yes
|
||
add ecx,21
|
||
add edi, ecx ;Advance to next entry
|
||
dec dl
|
||
cmp dl,0
|
||
jne l.21_2
|
||
dec dh
|
||
cmp dh,0
|
||
jne l.20_2
|
||
jmp frnoreadd_1
|
||
|
||
fdc_status_error_4:
|
||
pop edi esi edx ecx ebx eax
|
||
add esp,32
|
||
jmp fdc_status_error_1
|
||
|
||
fifoundd_1:
|
||
mov eax,[path_pointer_flp]
|
||
cmp [eax+36],byte 0
|
||
je fifoundd_2
|
||
add edi,0xf
|
||
mov eax,[edi]
|
||
and eax,65535
|
||
mov ebx,[path_pointer_flp]
|
||
add ebx,36
|
||
call get_cluster_of_a_path_flp
|
||
jc frnoreadd_1_1
|
||
mov edi,ebx
|
||
add edi,11
|
||
jmp fifoundd_2_1
|
||
fifoundd_2:
|
||
dec [FDD_Sector]
|
||
fifoundd_2_1:
|
||
mov [edi-11],byte 0xE5 ;mark filename deleted
|
||
add edi,0xf
|
||
mov eax,[edi]
|
||
and eax,65535
|
||
mov edi,eax ;edi = cluster
|
||
frnewd_1:
|
||
shl edi,1 ;find next cluster from FAT
|
||
add edi,0x282000
|
||
mov eax,[edi]
|
||
mov [edi],word 0x0 ;clear fat chain cluster
|
||
and eax,4095
|
||
mov edi,eax
|
||
cmp edi,dword 4095 ;last cluster ?
|
||
jz frnoreadd2_1
|
||
jmp frnewd_1
|
||
|
||
frnoreadd2_1:
|
||
call WriteSectWithRetr
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_4
|
||
call save_flp_fat
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_4
|
||
; pop edi esi edx ecx ebx eax
|
||
; add esp,32
|
||
mov ebp,0 ; file found
|
||
; jmp filedelete_newtry_1
|
||
jmp frnoreadd_1
|
||
|
||
frnoreadd_1_1:
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_4
|
||
frnoreadd_1:
|
||
pop edi esi edx ecx ebx eax
|
||
add esp,32
|
||
mov eax,ebp
|
||
ret
|
||
|
||
floppy_filesave:
|
||
;----------------------------------------------------------
|
||
;
|
||
; filesave - sys floppy
|
||
;
|
||
; eax ; pointer to file name 11 chars - for root directory
|
||
; ebx ; buffer
|
||
; ecx ; count to write in bytes
|
||
; edx ; 0 create new , 1 append
|
||
; edi pointer to path /fd/1/...... - for all files in nested directories
|
||
;
|
||
; output : eax = 0 - ok
|
||
; 5 - file not found / directory not found
|
||
; 8 - disk full
|
||
; 10 - access denied
|
||
;-----------------------------------------------------------
|
||
mov [path_pointer_flp],edi
|
||
sub esp,32
|
||
call expand_filename
|
||
cmp edx,0
|
||
jnz fsdel_1
|
||
pusha
|
||
call floppy_filedelete
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_6
|
||
popa
|
||
mov [save_flag],1
|
||
fsdel_1:
|
||
call floppy_free_space
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_6
|
||
cmp ecx,edi
|
||
jb rd_do_save_1
|
||
add esp,32
|
||
mov eax,8 ; not enough free space
|
||
mov [flp_status],0
|
||
ret
|
||
|
||
fdc_status_error_6:
|
||
popa
|
||
add esp,32
|
||
jmp fdc_status_error_1
|
||
|
||
rd_do_save_1:
|
||
push eax ebx ecx edx esi edi
|
||
call read_flp_fat
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
push eax
|
||
mov eax,[path_pointer_flp]
|
||
cmp [eax+36],byte 0
|
||
jne fifoundds_2
|
||
pop eax
|
||
mov [save_root_flag],1
|
||
call read_flp_root
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
mov edi,0x8000 ;Point at directory
|
||
mov edx,224 +1
|
||
; find an empty spot for filename in the root dir
|
||
l20ds_1:
|
||
sub edx,1
|
||
cmp edx,0
|
||
jnz l21ds_1
|
||
jmp frnoreadds_1
|
||
l21ds_1:
|
||
cmp [edi],byte 0xE5
|
||
jz fifoundds_1
|
||
cmp [edi],byte 0x0
|
||
jz fifoundds_1
|
||
add edi,32 ; Advance to next entry
|
||
jmp l20ds_1
|
||
|
||
fifoundds_2:
|
||
pop eax
|
||
mov [save_root_flag],0
|
||
mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Head],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
mov [FDD_Sector],2 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
call SeekTrack
|
||
mov dh,14
|
||
l.20_3:
|
||
call ReadSectWithRetr
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
mov dl,16
|
||
mov edi,0xD000
|
||
inc [FDD_Sector]
|
||
l.21_3:
|
||
mov esi,eax ;Name of file we want
|
||
mov ecx,11
|
||
cld
|
||
rep cmpsb ;Found the file?
|
||
je fifoundds_3 ;Yes
|
||
add ecx,21
|
||
add edi, ecx ;Advance to next entry
|
||
dec dl
|
||
cmp dl,0
|
||
jne l.21_3
|
||
dec dh
|
||
cmp dh,0
|
||
jne l.20_3
|
||
fdc_status_error_8:
|
||
pop edi esi edx ecx ebx eax
|
||
mov eax,5 ; file not found ?
|
||
mov ebx,-1
|
||
add esp,32
|
||
mov [flp_status],0
|
||
ret
|
||
|
||
fifoundds_3:
|
||
add edi,0xf
|
||
mov eax,[edi]
|
||
and eax,65535
|
||
mov ebx,[path_pointer_flp]
|
||
add ebx,36
|
||
call get_cluster_of_a_path_flp
|
||
jc fdc_status_error_7_1
|
||
found_directory_for_writing_flp:
|
||
call analyze_directory_to_write_flp
|
||
jc fdc_status_error_7_1
|
||
mov edi,ebx
|
||
fifoundds_1:
|
||
push edi ; move the filename to root dir
|
||
mov esi,[esp+4+20]
|
||
cmp [save_root_flag],0
|
||
jne fifoundds_4
|
||
mov esi,[pointer_file_name_flp]
|
||
fifoundds_4:
|
||
mov ecx,11
|
||
cld
|
||
rep movsb
|
||
pop edi
|
||
mov edx,edi
|
||
add edx,11+0xf ; edx <- cluster save position
|
||
mov ebx,[esp+12] ; save file size
|
||
mov [edi+28],ebx
|
||
mov [edi+11],byte 0x20 ; attribute
|
||
call get_date_for_file ; from FAT32.INC
|
||
mov [edi+24],ax ; date
|
||
mov [edi+18],ax ; date
|
||
call get_time_for_file ; from FAT32.INC
|
||
mov [edi+22],ax ; time
|
||
xor ax,ax
|
||
mov [edi+20],ax
|
||
mov ebx,1 ; first cluster
|
||
cmp [save_root_flag],0
|
||
jne frnewds_1
|
||
call frnewds_2
|
||
pusha
|
||
call WriteSectWithRetr
|
||
popa
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
jmp frnewds_3
|
||
|
||
frnewds_1:
|
||
call frnewds_2
|
||
frnewds_3:
|
||
pusha ; move save to floppy cluster
|
||
add ebx,31
|
||
mov eax,ebx
|
||
mov esi,[esp+32+16]
|
||
call take_data_from_application_1
|
||
call save_chs_sector
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
popa
|
||
mov eax,[esp+12]
|
||
cmp eax,512
|
||
jb flnsa_1
|
||
sub eax,512
|
||
mov [esp+12],eax
|
||
mov eax,[esp+16]
|
||
add eax,512
|
||
mov [esp+16],eax
|
||
jmp frnewds_1
|
||
|
||
frnewds_2:
|
||
add ebx,1
|
||
mov edi,ebx ; find free cluster in FAT
|
||
shl edi,1
|
||
add edi,0x282000
|
||
mov eax,[edi]
|
||
and eax,4095
|
||
cmp eax,0x0
|
||
jnz frnewds_2
|
||
mov [edx],bx ; save next cluster pos. to prev cl.
|
||
mov edx,edi ; next save pos abs mem add
|
||
ret
|
||
|
||
flnsa_1:
|
||
mov [edi],word 4095 ; mark end of file - last cluster
|
||
cmp [save_root_flag],1
|
||
jne flnsa_2
|
||
call save_flp_root
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
flnsa_2:
|
||
call save_flp_fat
|
||
cmp [FDC_Status],0
|
||
jne fdc_status_error_7
|
||
frnoreadds_1:
|
||
pop edi esi edx ecx ebx eax
|
||
add esp,32
|
||
mov eax,0
|
||
mov [flp_status],0
|
||
ret
|
||
|
||
fdc_status_error_7_1:
|
||
cmp [FDC_Status],0
|
||
je fdc_status_error_8
|
||
fdc_status_error_7:
|
||
pop edi esi edx ecx ebx eax
|
||
add esp,32
|
||
jmp fdc_status_error_1
|
||
|
||
save_chs_sector:
|
||
call calculate_chs
|
||
call WriteSectWithRetr
|
||
ret
|
||
|
||
calculate_chs:
|
||
mov bl,[FDD_Track]
|
||
mov [old_track],bl
|
||
mov ebx,18
|
||
xor edx,edx
|
||
div ebx
|
||
inc edx
|
||
mov [FDD_Sector],dl
|
||
xor edx,edx
|
||
mov ebx,2
|
||
div ebx
|
||
mov [FDD_Track],al
|
||
mov [FDD_Head],0
|
||
cmp edx,0
|
||
je no_head_2
|
||
inc [FDD_Head]
|
||
no_head_2:
|
||
mov dl,[old_track]
|
||
cmp dl,[FDD_Track]
|
||
je no_seek_track_1
|
||
call SeekTrack
|
||
no_seek_track_1:
|
||
ret
|
||
|
||
|
||
get_cluster_of_a_path_flp:
|
||
;---------------------------------------------------------
|
||
; input : EBX = pointer to a path string
|
||
; (example: the path "/files/data/document" become
|
||
; "files......data.......document...0"
|
||
; '.' = space char
|
||
; '0' = char(0) (ASCII=0) !!! )
|
||
; output : if (CARRY=1) -> ERROR in the PATH
|
||
; if (CARRY=0) -> EAX=cluster
|
||
;---------------------------------------------------------
|
||
|
||
push edx
|
||
mov edx,ebx
|
||
|
||
search_end_of_path_flp:
|
||
cmp [save_flag],0
|
||
jne search_end_of_path_flp_1
|
||
cmp byte [edx],0
|
||
je found_end_of_path_flp
|
||
jmp search_end_of_path_flp_2
|
||
search_end_of_path_flp_1:
|
||
cmp byte [edx+12],0
|
||
je found_end_of_path_flp
|
||
search_end_of_path_flp_2:
|
||
inc edx ; '/'
|
||
call analyze_directory_flp
|
||
jc directory_not_found_flp
|
||
|
||
mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field
|
||
mov ax,[ebx+26] ; read the LOW 16bit cluster field
|
||
and eax,0xfff ;[fatMASK]
|
||
add edx,11 ; 8+3 (name+extension)
|
||
jmp search_end_of_path_flp
|
||
|
||
found_end_of_path_flp:
|
||
inc edx
|
||
mov [pointer_file_name_flp],edx
|
||
pop edx
|
||
clc ; no errors
|
||
ret
|
||
|
||
directory_not_found_flp:
|
||
pop edx
|
||
stc ; errors occour
|
||
ret
|
||
|
||
analyze_directory_flp:
|
||
;--------------------------------
|
||
; input : EAX = first cluster of the directory
|
||
; EBX = pointer to filename
|
||
; output : IF CARRY=0 EAX = sector where th file is found
|
||
; EBX = pointer in buffer
|
||
; [buffer .. buffer+511]
|
||
; ECX,EDX,EDI,EDI not changed
|
||
; IF CARRY=1
|
||
;--------------------------------
|
||
push ebx ;[esp+16]
|
||
push ecx
|
||
push edx
|
||
push esi
|
||
push edi
|
||
|
||
|
||
adr56_flp:
|
||
mov [clust_tmp_flp],eax
|
||
add eax,31
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status],0
|
||
jne not_found_file_analyze_flp
|
||
|
||
mov ecx,512/32
|
||
mov ebx,0xD000
|
||
|
||
adr1_analyze_flp:
|
||
mov esi,edx ;[esp+16]
|
||
mov edi,ebx
|
||
cld
|
||
push ecx
|
||
mov ecx,11
|
||
rep cmpsb
|
||
pop ecx
|
||
je found_file_analyze_flp
|
||
|
||
add ebx,32
|
||
loop adr1_analyze_flp
|
||
|
||
mov eax,[clust_tmp_flp]
|
||
shl eax,1 ;find next cluster from FAT
|
||
add eax,0x282000
|
||
mov eax,[eax]
|
||
and eax,4095
|
||
cmp eax,0x0ff8
|
||
jb adr56_flp
|
||
not_found_file_analyze_flp:
|
||
pop edi
|
||
pop esi
|
||
pop edx
|
||
pop ecx
|
||
add esp,4
|
||
stc ;file not found
|
||
ret
|
||
|
||
found_file_analyze_flp:
|
||
pop edi
|
||
pop esi
|
||
pop edx
|
||
pop ecx
|
||
add esp,4
|
||
clc ;file found
|
||
ret
|
||
|
||
|
||
analyze_directory_to_write_flp:
|
||
;--------------------------------
|
||
; input : EAX = first cluster of the directory
|
||
; output : IF CARRY=0 EAX = sector where the file is found
|
||
; EBX = pointer in buffer
|
||
; [buffer .. buffer+511]
|
||
; ECX,EDX,EDI,EDI not changed
|
||
; IF CARRY=1
|
||
;--------------------------------
|
||
|
||
push ecx
|
||
push edx
|
||
push esi
|
||
|
||
adr561:
|
||
mov [clust_tmp_flp],eax
|
||
add eax,31
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status],0
|
||
jne error_found_file_analyze1
|
||
|
||
mov ecx,512/32
|
||
mov ebx,0xD000
|
||
|
||
adr1_analyze1:
|
||
cmp byte [ebx],0x00
|
||
je found_file_analyze1
|
||
cmp byte [ebx],0xe5
|
||
je found_file_analyze1
|
||
|
||
avanti:
|
||
add ebx,32
|
||
loop adr1_analyze1
|
||
|
||
mov eax,[clust_tmp_flp]
|
||
shl eax,1 ;find next cluster from FAT
|
||
add eax,0x282000
|
||
mov eax,[eax]
|
||
and eax,4095
|
||
cmp eax,0x0ff8
|
||
jb adr561
|
||
|
||
call get_free_FAT ;this block of code add a new cluster
|
||
;for the directory because the directory
|
||
;is full
|
||
|
||
mov [edi],word 0x0fff
|
||
|
||
mov eax,[clust_tmp_flp]
|
||
shl eax,1 ;find next cluster from FAT
|
||
add eax,0x282000
|
||
sub edi,0x282000
|
||
mov [eax],di
|
||
|
||
pusha
|
||
mov ecx,512/4
|
||
xor eax,eax
|
||
mov edi,0xD000
|
||
cld
|
||
rep stosd
|
||
popa
|
||
|
||
mov eax,edi
|
||
add eax,31
|
||
pusha
|
||
call save_chs_sector
|
||
popa
|
||
cmp [FDC_Status],0
|
||
jne error_found_file_analyze1
|
||
mov ebx,0xD000
|
||
|
||
found_file_analyze1:
|
||
|
||
pop esi
|
||
pop edx
|
||
pop ecx
|
||
clc ;file found
|
||
ret
|
||
|
||
error_found_file_analyze1:
|
||
pop esi
|
||
pop edx
|
||
pop ecx
|
||
stc
|
||
ret
|
||
|
||
get_free_FAT_flp:
|
||
;------------------------------------------
|
||
; input : EAX = # cluster for start the searching
|
||
; output : EAX = # first cluster found free
|
||
;-------------------------------------------
|
||
push ebx
|
||
|
||
mov ebx,1
|
||
check_new_flp:
|
||
add ebx,1
|
||
mov edi,ebx ; find free cluster in FAT
|
||
shl edi,1
|
||
add edi,0x282000
|
||
mov eax,[edi]
|
||
and eax,4095
|
||
cmp eax,0x0
|
||
jnz check_new_flp
|
||
|
||
pop ebx
|
||
ret
|
||
|
||
; \begin{diamond}
|
||
fd_find_lfn:
|
||
; in: esi->name
|
||
; out: CF=1 - file not found
|
||
; else CF=0 and edi->direntry
|
||
pusha
|
||
sub esp, 262*2 ; reserve place for LFN
|
||
mov ebp, esp
|
||
push 0 ; for fat_get_name: read ASCII name
|
||
call read_flp_fat
|
||
cmp [FDC_Status], 0
|
||
jnz .error
|
||
mov eax, 19
|
||
mov dh, 14
|
||
.main_loop:
|
||
.20_1:
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status], 0
|
||
jnz .error
|
||
mov edi, 0xD000
|
||
inc [FDD_Sector]
|
||
push eax
|
||
.21_1:
|
||
call fat_get_name
|
||
jc @f
|
||
call fat_compare_name
|
||
jz .found
|
||
@@:
|
||
add edi, 0x20
|
||
cmp edi, 0xD200
|
||
jb .21_1
|
||
pop eax
|
||
inc eax
|
||
dec dh
|
||
js @f
|
||
jnz .20_1
|
||
.error:
|
||
add esp, 262*2+4
|
||
popa
|
||
stc
|
||
ret
|
||
@@:
|
||
; read next sector from FAT
|
||
mov eax, [(eax-31-1)*2+0x282000]
|
||
and eax, 0xFFF
|
||
cmp eax, 0xFF8
|
||
jae .error
|
||
add eax, 31
|
||
jmp .main_loop
|
||
.found:
|
||
pop eax
|
||
; if LFN entry, advance to corresponding short entry
|
||
cmp byte [edi+11], 0xF
|
||
jnz .entryfound
|
||
add edi, 0x20
|
||
cmp edi, 0xD200
|
||
jb .entryfound
|
||
dec dh
|
||
jz .error
|
||
inc eax
|
||
call read_chs_sector
|
||
cmp [FDC_Status], 0
|
||
jnz .error
|
||
mov edi, 0xD000
|
||
.entryfound:
|
||
cmp byte [esi], 0
|
||
jz .done
|
||
test byte [edi+11], 10h ; is a directory?
|
||
jz .error
|
||
movzx eax, word [edi+26]
|
||
add eax, 31
|
||
mov dh, 0
|
||
jmp .main_loop
|
||
.done:
|
||
add esp, 262*2+4+4
|
||
push edi
|
||
popad
|
||
ret
|
||
|
||
;----------------------------------------------------------------
|
||
;
|
||
; fs_FloppyRead - LFN variant for reading floppy
|
||
;
|
||
; esi points to filename
|
||
; ebx pointer to 64-bit number = first wanted byte, 0+
|
||
; may be ebx=0 - start from first byte
|
||
; ecx number of bytes to read, 0+
|
||
; edx mem location to return data
|
||
;
|
||
; ret ebx = bytes read or 0xffffffff file not found
|
||
; eax = 0 ok read or other = errormsg
|
||
;
|
||
;--------------------------------------------------------------
|
||
fs_FloppyRead:
|
||
call read_flp_fat
|
||
cmp byte [esi], 0
|
||
jnz @f
|
||
or ebx, -1
|
||
mov eax, 10 ; access denied
|
||
ret
|
||
@@:
|
||
push edi
|
||
call fd_find_lfn
|
||
jnc .found
|
||
pop edi
|
||
or ebx, -1
|
||
mov eax, 5 ; file not found
|
||
ret
|
||
.found:
|
||
test ebx, ebx
|
||
jz .l1
|
||
cmp dword [ebx+4], 0
|
||
jz @f
|
||
xor ebx, ebx
|
||
.reteof:
|
||
mov eax, 6 ; EOF
|
||
pop edi
|
||
ret
|
||
@@:
|
||
mov ebx, [ebx]
|
||
.l1:
|
||
push ecx edx
|
||
push 0
|
||
mov eax, [edi+28]
|
||
sub eax, ebx
|
||
jb .eof
|
||
cmp eax, ecx
|
||
jae @f
|
||
mov ecx, eax
|
||
mov byte [esp], 6 ; EOF
|
||
@@:
|
||
movzx edi, word [edi+26]
|
||
.new:
|
||
jecxz .done
|
||
test edi, edi
|
||
jz .eof
|
||
cmp edi, 0xFF8
|
||
jae .eof
|
||
lea eax, [edi+31]
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status], 0
|
||
jnz .err
|
||
sub ebx, 512
|
||
jae .skip
|
||
lea eax, [0xD000+ebx+512]
|
||
neg ebx
|
||
push ecx
|
||
cmp ecx, ebx
|
||
jbe @f
|
||
mov ecx, ebx
|
||
@@:
|
||
mov ebx, edx
|
||
call memmove
|
||
add edx, ecx
|
||
sub [esp], ecx
|
||
pop ecx
|
||
xor ebx, ebx
|
||
.skip:
|
||
movzx edi, word [edi*2+0x282000]
|
||
jmp .new
|
||
.done:
|
||
mov ebx, edx
|
||
pop eax edx ecx edi
|
||
sub ebx, edx
|
||
ret
|
||
.eof:
|
||
mov ebx, edx
|
||
pop eax edx ecx
|
||
jmp .reteof
|
||
.err:
|
||
mov ebx, edx
|
||
pop eax edx ecx edi
|
||
sub ebx, edx
|
||
mov al, 5 ; may be other error code?
|
||
ret
|
||
|
||
;----------------------------------------------------------------
|
||
;
|
||
; fs_FloppyReadFolder - LFN variant for reading floppy folders
|
||
;
|
||
; esi points to filename
|
||
; ebx pointer to 32-bit number = first wanted block, 0+
|
||
; ecx number of blocks to read, 0+
|
||
; edx mem location to return data
|
||
;
|
||
; ret ebx = blocks read or 0xffffffff folder not found
|
||
; eax = 0 ok read or other = errormsg
|
||
;
|
||
;--------------------------------------------------------------
|
||
fs_FloppyReadFolder:
|
||
call read_flp_fat
|
||
mov ebx, [ebx]
|
||
push edi
|
||
cmp byte [esi], 0
|
||
jz .root
|
||
call fd_find_lfn
|
||
jnc .found
|
||
pop edi
|
||
or ebx, -1
|
||
mov eax, ERROR_FILE_NOT_FOUND
|
||
ret
|
||
.found:
|
||
test byte [edi+11], 0x10 ; do not allow read files
|
||
jnz .found_dir
|
||
pop edi
|
||
or ebx, -1
|
||
mov eax, ERROR_ACCESS_DENIED
|
||
ret
|
||
.found_dir:
|
||
movzx eax, word [edi+26]
|
||
add eax, 31
|
||
push 0
|
||
jmp .doit
|
||
.root:
|
||
mov eax, 19
|
||
push 14
|
||
.doit:
|
||
push ecx ebp
|
||
sub esp, 262*2 ; reserve space for LFN
|
||
mov ebp, esp
|
||
push 1 ; for fat_get_name: read UNICODE names
|
||
; init header
|
||
push eax ecx
|
||
mov edi, edx
|
||
mov ecx, 32/4
|
||
xor eax, eax
|
||
rep stosd
|
||
pop ecx eax
|
||
mov byte [edx], 1 ; version
|
||
mov esi, edi ; esi points to BDFE
|
||
.main_loop:
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status], 0
|
||
jnz .error
|
||
mov edi, 0xD000
|
||
push eax
|
||
.l1:
|
||
call fat_get_name
|
||
jc .l2
|
||
cmp byte [edi+11], 0xF
|
||
jnz .do_bdfe
|
||
add edi, 0x20
|
||
cmp edi, 0xD200
|
||
jb .do_bdfe
|
||
pop eax
|
||
inc eax
|
||
dec byte [esp+262*2+12]
|
||
jz .done
|
||
jns @f
|
||
; read next sector from FAT
|
||
mov eax, [(eax-31-1)*2+0x282000]
|
||
and eax, 0xFFF
|
||
cmp eax, 0xFF8
|
||
jae .done
|
||
add eax, 31
|
||
mov byte [esp+262*2+12], 0
|
||
@@:
|
||
pusha
|
||
call read_chs_sector
|
||
popa
|
||
cmp [FDC_Status], 0
|
||
jnz .error
|
||
mov edi, 0xD000
|
||
push eax
|
||
.do_bdfe:
|
||
inc dword [edx+8] ; new file found
|
||
dec ebx
|
||
jns .l2
|
||
dec ecx
|
||
js .l2
|
||
inc dword [edx+4] ; new file block copied
|
||
call fat_entry_to_bdfe
|
||
.l2:
|
||
add edi, 0x20
|
||
cmp edi, 0xD200
|
||
jb .l1
|
||
pop eax
|
||
inc eax
|
||
dec byte [esp+262*2+12]
|
||
jz .done
|
||
jns @f
|
||
; read next sector from FAT
|
||
mov eax, [(eax-31-1)*2+0x282000]
|
||
and eax, 0xFFF
|
||
cmp eax, 0xFF8
|
||
jae .done
|
||
add eax, 31
|
||
mov byte [esp+262*2+12], 0
|
||
@@:
|
||
jmp .main_loop
|
||
.error:
|
||
add esp, 262*2+4
|
||
pop ebp ecx edi edi
|
||
or ebx, -1
|
||
mov eax, ERROR_FILE_NOT_FOUND
|
||
ret
|
||
.done:
|
||
add esp, 262*2+4
|
||
pop ebp
|
||
mov ebx, [edx+4]
|
||
xor eax, eax
|
||
dec ecx
|
||
js @f
|
||
mov al, ERROR_END_OF_FILE
|
||
@@:
|
||
pop ecx edi edi
|
||
ret
|
||
|
||
; \end{diamond} |