A2osX/SYS/KERNEL.S.DEV.txt

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