Remove unused code.
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@676 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman
parent
72c8bf17b8
commit
c4235b8fff
@ -58,43 +58,6 @@ fl_rst1: xor ax,ax ; FALSE on error
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ret
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;
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;
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; Read DASD Type
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;
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; COUNT fl_readdasd(WORD drive)
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;
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; returns 0-3 if successful, 0xFF if error
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;
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; Code Meaning
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; 0 The drive is not present
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; 1 Drive present, cannot detect disk change
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; 2 Drive present, can detect disk change
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; 3 Fixed disk
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;
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%if 0
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global _fl_readdasd
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_fl_readdasd:
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push bp
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mov bp,sp
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mov dl,[bp+4] ; get the drive number
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mov ah,15h ; read DASD type
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int 13h
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jc fl_rdasd1 ; cy==1 is error
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mov al,ah ; for the return code
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xor ah,ah
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pop bp ; C exit
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ret
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fl_rdasd1: mov ah,0 ; BIOS reset disketter & fixed disk
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int 13h
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mov ax,0FFh ; 0xFF on error
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pop bp ; C exit
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ret
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%endif
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;
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;
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; Read disk change line status
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@ -129,32 +92,6 @@ fl_dc_error: mov ax,0FFh ; 0xFF on error
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ret
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;
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; Read the disk system status
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;
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; COUNT fl_rd_status(WORD drive)
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;
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; Returns error codes
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;
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; See Phoenix Bios Book for error code meanings
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;
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%if 0
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global _fl_rd_status
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_fl_rd_status:
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push bp ; C entry
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mov bp,sp
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mov dl,[bp+4] ; get the drive number
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mov ah,1 ; read status
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int 13h
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mov al,ah ; for the return code
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xor ah,ah
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pop bp ; C exit
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ret
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%endif
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;
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; Format Sectors
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;
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@ -238,136 +175,6 @@ fl_error:
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ret
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%if 0
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;
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;
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; Get number of disks
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;
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; COUNT fl_nrdrives(VOID)
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;
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; returns AX = number of harddisks
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;
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global _fl_nrdrives
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_fl_nrdrives:
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push di ; di reserved by C-code ???
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mov ah,8 ; DISK, get drive parameters
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mov dl,80h
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int 13h
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mov ax,0 ; fake 0 drives on error
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jc fl_nrd1
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mov al,dl
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fl_nrd1:
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pop di
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ret
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%endif
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; ---------------------------------------------------------------------------
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; LBA Specific Code
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;
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;
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; Added by: Brian E. Reifsnyder
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; ---------------------------------------------------------------------------
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;
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;
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; Check for Enhanced Disk Drive support (EDD). If EDD is supported then
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; LBA can be utilized to access the hard disk.
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;
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; unsigned int lba_support(WORD hard_disk_number)
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;
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; returns TRUE if LBA can be utilized
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;
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%if 0
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global _fl_lba_support
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_fl_lba_support:
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push bp ; C entry
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mov bp,sp
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mov dl,[bp+4] ; get the drive number
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mov ah,41h ; cmd CHECK EXTENSIONS PRESENT
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mov bx,55aah
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int 13h ; check for int 13h extensions
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jc fl_lba_support_no_lba
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; if carry set, don't use LBA
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cmp bx,0aa55h
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jne fl_lba_support_no_lba
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; if bx!=0xaa55, don't use LBA
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test cl,01h
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jz fl_lba_support_no_lba
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; if DAP cannot be used, don't use
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; LBA
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mov ax,0001h ; return TRUE (LBA supported)
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pop bp ; C exit
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ret
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fl_lba_support_no_lba
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xor ax,ax ; return FALSE (LBA not supported)
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pop bp ; C exit
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ret
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;
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; Read Sectors
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;
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; COUNT fl_lba_read(WORD drive, WORD dap_segment, WORD dap_offset);
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;
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; Reads one or more sectors.
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;
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; Returns 0 if successful, error code otherwise.
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;
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;
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; Write Sectors
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;
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; COUNT fl_lba_write(WORD drive, WORD dap_segment, WORD dap_offset);
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;
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; Writes one or more sectors.
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;
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; Returns 0 if successful, error code otherwise.
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;
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global _fl_lba_read
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_fl_lba_read:
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mov ah,42h ; cmd READ
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jmp short fl_lba_common
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global _fl_lba_write
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_fl_lba_write:
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mov ax,4300h ; cmd WRITE without verify
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jmp short fl_lba_common
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global _fl_lba_write_and_verify
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_fl_lba_write_and_verify:
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mov ax,4302h ; cmd WRITE with VERIFY
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jmp short fl_lba_common ; This has been added for
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; possible future use
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global _fl_lba_verify
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_fl_lba_verify:
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mov ah,44h ; cmd VERIFY
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fl_lba_common:
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push bp ; C entry
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mov bp,sp
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push ds
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mov dl,[bp+4] ; get the drive (if or'ed 80h its
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; hard drive.
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lds si,[bp+6] ; get far dap pointer
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int 13h ; read from/write to drive
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mov al,ah ; place any error code into al
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xor ah,ah ; zero out ah
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pop ds
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pop bp
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ret
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%endif
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; COUNT fl_lba_ReadWrite(BYTE drive, UWORD mode, VOID FAR *dap_p)
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;
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; Returns 0 if successful, error code otherwise.
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