ata_atapi33a.inc

TestOS - 带简单GUI的DOS扩展OS// 源代码// ASM// 英文

        test  al,0x80                                     ; BSY bit
        jnz   pass_drq_err_check_2w
        test  al,0x01
        jnz   loc_ata_ide_io_error_w
        clc
        ret

pass_drq_err_check_2w:

        loop loc_read_status_reg_4w

loc_ata_ide_io_error_w:
        stc
        ret

 ;----------------------------------------------------;
 ; Play cd                                            ;
 ;----------------------------------------------------;

Play_cd:
        push  edi

        call  Clear_atapi_packet
        
        mov   byte[packet+8],0xff
        mov   byte[packet+7],0xff
        mov   byte[packet+5],0xff
        mov   byte[packet+4],0xff
        mov   byte[packet+3],0xff
        mov   byte[packet+2],0xff
        mov   byte[packet+0],0x45
        call  Send_Atapi_Packet

        pop   edi

        ret

 ;----------------------------------------------------;
 ; Read toc                                            ;
 ;----------------------------------------------------;

Read_toc:
        
        call  Wait_unit_ready
        jc    Unit_not_ready_a
        pushad
        call  Small_Delay1
        call  Clear_atapi_packet
        mov   ax,402
        mov   byte[packet+8],ah
        mov   byte[packet+7],al ;ah
        mov   byte[packet+0],0x43
        call  Send_Atapi_Packet
       ; call  Small_Delay1           ;new
        jc    Unit_not_ready_b
      ;  call  Clear_status           ;new
      ;  jc    Unit_not_ready_b       ;new
        call  Read_write_toc
      
Unit_not_ready_b:
        popad
Unit_not_ready_a:
        ret   
   

 ;----------------------------------------------------;
 ; Clear atapi packet                                 ;
 ;----------------------------------------------------;

Clear_atapi_packet:
        push  edi
        pushad
        mov  ax,linear_sel
	mov  es,ax
        cld
        cli
        
        mov   edi,packet
        xor   ecx,ecx
        mov   cx,12
        xor   al,al
                
        rep   stosb
        sti      
        popad
        pop   edi

        ret

 ;----------------------------------------------------;
 ; Stop cd                                            ;
 ;----------------------------------------------------;
Stop_cd:
        push  edi

        call  Clear_atapi_packet
       
        mov   byte[packet+4],0x0
        mov   byte[packet+1],0x1
        mov   byte[packet+0],0x1b
                
        call  Send_Atapi_Packet

        pop   edi

        ret   

 ;----------------------------------------------------;
 ; Pause cd                                           ;
 ;----------------------------------------------------;

Pause_cd:
        push  edi

        call  Clear_atapi_packet
        
        mov   byte[packet+8],0x0               
        mov   byte[packet+0],0x4b
                
        call  Send_Atapi_Packet

        pop   edi

        ret   

 ;----------------------------------------------------;
 ; Start cd                                           ;
 ;----------------------------------------------------;

Start_cd:
        push  edi

        call  Clear_atapi_packet
        
        mov   byte[packet+4],0x1
        mov   byte[packet+1],0x1
        mov   byte[packet+0],0x1b
                
        call  Send_Atapi_Packet

        pop   edi

        ret   


 ;----------------------------------------------------;
 ; Eject cd                                           ;
 ;----------------------------------------------------;

Eject_cd:
        push  edi
        pushad
       
        call  Clear_atapi_packet
        
        mov   byte[packet+4],0x2
        mov   byte[packet+1],0x1
        mov   byte[packet+0],0x1b
                
        call  Send_Atapi_Packet
        popad
        pop   edi

        ret   

 ;----------------------------------------------------;
 ; Close cd                                           ;
 ;----------------------------------------------------;

Close_cd:
        push  edi
        pushad
        call  Clear_atapi_packet
       
       
        mov   byte[packet+0],0x1b 
        
        mov   byte[packet+1],0x1
       
        mov   byte[packet+4],0x3
                
        call  Send_Atapi_Packet
        popad
        pop   edi

        ret 
 ;----------------------------------------------------;
 ; Small Delay                                        ;
 ;----------------------------------------------------;

Small_Delay1:
        push  cx
        mov   cx,0xffff
BusyDelay3a11:                                  
        nop
        nop
        nop
        nop
        nop
        nop
        nop
        nop
        loop  BusyDelay3a11
        pop   cx
        
        ret  
  

 ;--------------------------------------------------------------------------------------------;
 ;                                           Data                                             ;
 ;--------------------------------------------------------------------------------------------;




packet:
		db 0x0                     
		db 0x0                    
		db 0x0                     
		db 0x0                     
                db 0x0                    
		db 0x0                     
		db 0x0
		db 0x0                             
		db 0x0                 
		db 0x0        
		db 0x0
		db 0x0

                                     
TOC_Data_Buffer:
                                      
rb 804                               


;---------------------------------------------------------------------------