Codice

246 volume VI os16
Script e sorgenti del kernel 247
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1040024 | int #0x10
1040025 | popa
1040026 | popf
1040027 | leave
1040028 | ret
104.5.5 kernel/ibm_i86/_int10_02.s
Si veda la sezione 103.4.
1050001 |.global __int10_02
1050002 |;-----------------------------------------------------------------------
1050003 |.text
1050004 |;-----------------------------------------------------------------------
1050005 |; INT 0x10 - video - set cursor position
1050006 |; AH = 0x02
1050007 |; BH = page number:
1050008 |; 0-7 in modes 0 and 1
1050009 |; 0-3 in modes 2 and 3
1050010 |; DH = row (0x00 is top)
1050011 |; DL = column (0x00 is left)
1050012 |;-----------------------------------------------------------------------
1050013 |.align 2
1050014 |__int10_02:
1050015 | enter #0, #0 ; No local variables.
1050016 | pushf
1050017 | cli
1050018 | pusha
1050019 | mov ah, #0x02
1050020 | mov bh, #0x00
1050021 | mov bh, 4[bp] ; 1st arg (page).
1050022 | mov dx, 6[bp] ; 2nd arg (pos).
1050023 | int #0x10
1050024 | popa
1050025 | popf
1050026 | leave
1050027 | ret
104.5.6 kernel/ibm_i86/_int10_05.s
Si veda la sezione 103.4.
1060001 |.global __int10_05
1060002 |;-----------------------------------------------------------------------
1060003 |.text
1060004 |;-----------------------------------------------------------------------
1060005 |; INT 0x10 - video - select active display page
1060006 |; AH = 0x05
1060007 |; AL = new page number (0x00 is the first)
1060008 |;-----------------------------------------------------------------------
1060009 |.align 2
1060010 |__int10_05:
1060011 | enter #0, #0 ; No local variables.
1060012 | pushf
1060013 | cli
1060014 | pusha
1060015 | mov ah, #0x05
1060016 | mov bh, 4[bp] ; 1st arg (page).
1060017 | int #0x10
1060018 | popa
1060019 | popf
1060020 | leave
1060021 | ret
104.5.7 kernel/ibm_i86/_int12.s
Si veda la sezione 103.4.
1070001 |.global __int12
1070002 |;-----------------------------------------------------------------------
1070003 |.text
1070004 |;-----------------------------------------------------------------------
1070005 |; INT 12 - bios - get memory size
1070006 |; Return:
1070007 |; AX = kilobytes of contiguous memory starting at absolute address
1070008 |; 0x00000
1070009 |;
1070010 |; This call returns the contents of the word at absolute address
1070011 |; 0x00413.
1070012 |;-----------------------------------------------------------------------
1070013 |.align 2
1070014 |__int12:
1070015 | enter #2, #0 ; 1 local variable.
1070016 | pushf
1070017 | cli
1070018 | pusha
1070019 | int #0x12
1070020 | mov -2[bp], ax ; save AX.
1070021 | popa
1070022 | popf
1070023 | mov ax, -2[bp] ; AX is the function return value.
1070024 | leave
1070025 | ret
104.5.8 kernel/ibm_i86/_int13_00.s
Si veda la sezione 103.4.
1080001 |.global __int13_00
1080002 |;-----------------------------------------------------------------------
1080003 |.text
1080004 |;-----------------------------------------------------------------------
1080005 |; INT 0x13 - disk - reset disk system
1080006 |; AH = 0x00
1080007 |; DL = drive (if bit 7 is set both hard disks and floppy disks
1080008 |; reset)
1080009 |; Return:
1080010 |; AH = status
1080011 |; CF clear if successful (returned AH=0x00)
1080012 |; CF set on error
1080013 |;-----------------------------------------------------------------------
1080014 |.align 2
1080015 |__int13_00:
1080016 | enter #2, #0 ; 1 local variable.
1080017 | pushf
1080018 | cli
1080019 | pusha
1080020 | mov ah, #0x00
1080021 | mov dl, 4[bp] ; 1st arg.
1080022 | int #0x13
1080023 | mov al, #0x00
1080024 | mov -2[bp], ax ; save AX.
1080025 | popa
1080026 | popf
1080027 | mov ax, -2[bp] ; AX is the function return value.
1080028 | leave
1080029 | ret
104.5.9 kernel/ibm_i86/_int13_02.s
Si veda la sezione 103.4.
1090001 |.global __int13_02
1090002 |;-----------------------------------------------------------------------
1090003 |.text
1090004 |;-----------------------------------------------------------------------
1090005 |; INT 0x13 - disk - read sectors into memory
1090006 |; AH = 0x02
1090007 |; AL = number of sectors to read (must be nonzero)
1090008 |; CH = cylinder number (0-255)
1090009 |; CL bit 6-7 =
1090010 |; cylinder number (256-1023)
1090011 |; CL bit 0-5 =
1090012 |; sector number (1-63)
1090013 |; DH = head number (0-255)
1090014 |; DL = drive number (bit 7 set for hard disk)
1090015 |; ES:BX -> data buffer
1090016 |; Return:
1090017 |; CF set on error
1090018 |; CF clear if successful
1090019 |; AH = status (0x00 if successful)
1090020 |; AL = number of sectors transferred (only valid if CF set for
1090021 |; some BIOSes)
1090022 |;-----------------------------------------------------------------------
1090023 |.align 2
1090024 |__int13_02:
1090025 | enter #2, #0 ; 1 local variable.
1090026 | pushf
1090027 | cli
1090028 | pusha
1090029 | mov ax, ds ; Set ES the same as DS.
1090030 | mov es, ax ;
1090031 | mov ax, 8[bp] ; 3rd arg (cylinder). It must be splitted and
1090032 | mov ch, al ; assigned to the right registers.
1090033 | mov cl, ah ;
1090034 | shl cl, 1 ;
1090035 | shl cl, 1 ;
1090036 | shl cl, 1 ;
1090037 | shl cl, 1 ;
1090038 | shl cl, 1 ;
1090039 | shl cl, 1 ;
1090040 | add cl, 12[bp] ; 5th arg (sector).
1090041 | mov dl, 4[bp] ; 1st arg (drive).
1090042 | mov al, 6[bp] ; 2nd arg (sectors to be read).
1090043 | mov dh, 10[bp] ; 4th arg (head).
1090044 | mov bx, 14[bp] ; 6th arg (buffer pointer).
1090045 | mov ah, #0x02
1090046 | int #0x13
1090047 | mov -2[bp], ax ; save AX.
1090048 | popa
1090049 | popf
1090050 | mov ax, -2[bp] ; AX is the function return value.
1090051 | leave
1090052 | ret
104.5.10 kernel/ibm_i86/_int13_03.s
Si veda la sezione 103.4.
1100001 |.global __int13_03
1100002 |;-----------------------------------------------------------------------
1100003 |.text
1100004 |;-----------------------------------------------------------------------
1100005 |; INT 0x13 - disk - write sectors to disk
1100006 |; AH = 0x03
1100007 |; AL = number of sectors to write (must be nonzero)
1100008 |; CH = cylinder number (0-255)
1100009 |; CL bit 6-7 =
1100010 |; cylinder number (256-1023)
1100011 |; CL bit 0-5 =
1100012 |; sector number (1-63)
1100013 |; DH = head number (0-255)
1100014 |; DL = drive number (bit 7 set for hard disk)
1100015 |; ES:BX -> data buffer
1100016 |; Return:
1100017 |; CF set on error
1100018 |; CF clear if successful
1100019 |; AH = status (0x00 if successful)
1100020 |; AL = number of sectors transferred (only valid if CF set for
1100021 |; some BIOSes)
1100022 |;-----------------------------------------------------------------------
1100023 |.align 2
1100024 |__int13_03:
1100025 | enter #2, #0 ; 1 local variable.
1100026 | pushf
1100027 | cli
1100028 | pusha
1100029 | mov ax, ds ; Set ES the same as DS.
1100030 | mov es, ax ;
1100031 | mov ax, 8[bp] ; 3rd arg (cylinder). It must be splitted and
1100032 | mov ch, al ; assigned to the right registers.
1100033 | mov cl, ah ;
1100034 | shl cl, 1 ;
1100035 | shl cl, 1 ;
1100036 | shl cl, 1 ;
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