;=====================================================
;
;Program:DetectATAPIdeviceexistornot
;Ifexist,changestatus.
;Ifnowexist,donothing.
;NotaffectATAdevice.
;Environment:PureDOS.
逆@风@者
;Author:JimYu(YuLing)
;Data:2004.07.15
;Version:1.0.0
;Mail:Jim.Yu@Mic.Com.Tw
;
.MODELSMALL
.586P
.STACK1024
.DATA
BSYEQU80h
DRQEQU8
START_STOP_UNITEQU1Bh
EJECT_TRAYEQU2
CLOSE_TRAYEQU3
MODE_SENCEEQU5Ah
STATUS_PAGEEQU2Ah
SIZE_OF_CHANNEL_ITEMEQU15h
SHOW_DOOR_OPENDB'DoorOpened.',0dh,0ah,'$'
SHOW_DOOR_CLOSEDB'DoorClosed.',0dh,0ah,'$'
NOT_EXISTDB'NotExist.',0dh,0ah,'$'
SS_CHANNELDB'4.SecondarySlave$'
SM_CHANNELDB'3.SecondaryMaster$'
PS_CHANNELDB'2.PrimanySlave$'
PM_CHANNELDB'1.PrimanyMaster$'
PACKET_COMMANDDB12DUP(0)
.CODE
START:
MOVAX,@code
MOVDS,AX
PUSHDS
;Codestart
pushsegPACKET_COMMAND
popds
movcx,4
next_device:
callshow_channel
calldetect_atapi
jnenot_atapi
calldetect_device
jc@f
callopen_device
callopen_deviceSomeATAPI(e.g.DVD-ROM)
callopen_deviceNeedsendcommand3times.
movdx,offsetSHOW_DOOR_OPEN
jmpshow_and_reset_device
@@:
callclose_device
callclose_deviceSomeATAPI(e.g.DVD-ROM)
callclose_deviceNeedsendcommand3times.
movdx,offsetSHOW_DOOR_CLOSE
show_and_reset_device:
movah,9
int21h
callreset_device
jmpcheck_device_finish
not_atapi:
movdx,offsetNOT_EXIST
movah,9
int21h
check_device_finish:
loopnext_device
;Codeend
POPDS
MOVAX,4C00h
INT21h
;=====================================================
;procedure:show_channel
;in:cx
;out:none
;destroy:none
show_channelproc
pushcx
pushsegSS_CHANNEL
popds
movdl,cl
decdl
movax,SIZE_OF_CHANNEL_ITEM
muldl
movdx,ax
adddx,offsetSS_CHANNEL
movah,9
int21h
popcx
ret
show_channelendp
;=====================================================
;procedure:waid_idle
;in:dx
;out:CY=timeout
;NC=deviceidle
;destroy:none
wait_idleproc
pushcx
pushdx
pushax
ordl,7
movcx,0ffffh
@@:
callin_al_dx
testal,BSY
jz@f
loop@b
@@:
popax
popdx
popcx
ret
wait_idleendp
;=====================================================
;procedure:req_data
;in:dx
;out:CY=timeout
;NC=devicerequestdata
;destroy:none
req_dataproc
pushcx
pushdx
pushax
ordl,7
movcx,0ffffh
@@:
callin_al_dx
testal,DRQ
jnz@f
loop@b
@@:
popax
popdx
popcx
ret
req_dataendp
;=====================================================
;procedure:set_feature
;in:ax
;out:none
;destroy:ax
;Set1X1=0
;Set1X4=AL
;Set1X5=AH
;Send1X70A0h
set_featureproc
pushdx
pushax
incdl
xoral,al
callout_dx_al
popax
adddl,3
callout_dx_al
incdl
xchgah,al
callout_dx_al
adddl,2
moval,0a0h
callout_dx_al
popdx
ret
set_featureendp
;=====================================================
;procedure:send_packet_command
;in:dx,si
;out:none
;destroy:ax,si
send_packet_commandproc
pushcx
movcx,6
@@:
movax,ds:[si]
callout_dx_ax
xorax,ax
movds:[si],ax
addsi,2
loop@b
callwait_idle
popcx
ret
send_packet_commandendp
;=====================================================
;procedure:detect_device
;in:cx
;out:CY=TrayOpen
;NC=TrayClose
;destroy:dx,ax,si
;Detectatapidevicetray
detect_deviceproc
callset_device
movax,090h
callset_feature
callwait_idle
@@:
movsi,offsetPACKET_COMMAND
movax,(STATUS_PAGE*100h) MODE_SENCE
movds:[si],al
movds:[si 2],ah
moval,90h
movds:[si 8],al
callsend_packet_command
callreq_data
callin_al_dx
callin_al_dx
cmpal,70h
jedoor_close
stc
ret
door_close:
clc
ret
detect_deviceendp
;=====================================================
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