A2osX/SYS/KERNEL.S.DEV.txt

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PREFIX /A2OSX.BUILD
AUTO 4,1
*/--------------------------------------
* # GetDevByID.A
* ## IN:
* A = DevID
* ## OUT:
* CC = OK, CS = ERROR
* Y,A = DEVSLOT
* note: X Unmodified
*\--------------------------------------
K.GetDevByID.A cmp DevMgr.Count
bcs K.GetDevDNF
asl
asl
asl
asl
tay
lda /Dev.Table
adc #0
rts CC
*/--------------------------------------
* # GetDevByName.YA
* ## IN:
* Y,A = Ptr to device name (C-String)
* ## OUT:
* CC = OK, CS = ERROR
* X = DEVID
* Y,A = DEVSLOT
*\--------------------------------------
K.GetDevByName.YA
>STYA ZPPtr1
>LDYAI Dev.Table+S.DEV.NAME
>STYA ZPPtr2
ldx #0
.1 ldy #$ff
.2 iny
lda (ZPPtr1),y
cmp (ZPPtr2),y
bne .3
ora (ZPPtr2),y Both char are 0 ?
bne .2 no....loop
lda ZPPtr2
and #$F0
tay
lda ZPPtr2+1
clc
rts
.3 lda ZPPtr2
clc
adc #S.DEV
sta ZPPtr2
bcc .4
inc ZPPtr2+1
.4 inx
cpx DevMgr.Count
bne .1
K.GetDevDNF lda #MLI.E.NODEV CS from cpx/beq
rts
*/--------------------------------------
* # GetDevStatus.A
* ## IN:
* A = DevID
* ## OUT:
* Y,A = S.DSTAT
*\--------------------------------------
K.DevClose.A ldx #DEVMGR.CLOSE
.HS 2C BIT ABS
K.GetDevStatus.A
ldx #DEVMGR.STATUS
jsr K.GetDevByID.A
bcs K.IOCTL.9
>STYA pDev
jmp (pDev)
*/--------------------------------------
* # IOCTL
* ## IN:
* PUSHB = DevID
* PUSHB = Operation
* PUSHW = Param Block
* ## OUT:
* Y,A = ...
*\--------------------------------------
K.IOCTL >PULLB .1+1
>PULLB .2+1
>PULLA
tax
>PULLA
jsr K.GetDevByID.A
bcs K.IOCTL.9
>STYA pDev
.1 ldy #$ff SELF MODIFIED
.2 lda #$ff SELF MODIFIED
jmp (pDev)
K.IOCTL.9 rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.DEV
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM