A2osX/SYS/KERNEL.S.DEV.txt

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
*/--------------------------------------
* # GetDevByID.A
* ## IN:
* A = DevID
* ## OUT:
* CC = OK, CS = ERROR
* Y,A = DEVSLOT
* note: X Unmodified
*\--------------------------------------
K.GetDevByID.A cmp DevMgr.Count
bcs K.GetDevDNF
asl
asl
asl
asl
php
clc
adc #Dev.Table
tay
plp
lda #0
adc /Dev.Table
rts CC
*/--------------------------------------
* # GetDevByName.YA
* ## IN:
* Y,A = Ptr to device name (C-String)
* ## OUT:
* CC = OK, CS = ERROR
* X = DEVID
* Y,A = DEVSLOT
*\--------------------------------------
K.GetDevByName.YA
>STYA ZPPtr1
>LDYAI Dev.Table+S.DEV.NAME
>STYA ZPPtr2
ldx #0
.1 ldy #$ff
.2 iny
lda (ZPPtr1),y
cmp (ZPPtr2),y
bne .3
ora (ZPPtr2),y Both char are 0 ?
bne .2 no....loop
lda ZPPtr2
sec
sbc #S.DEV.NAME
tay
lda ZPPtr2+1
sbc /S.DEV.NAME
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:
* CC = OK, CS = ERROR
* Y,A = Ptr to S.DEVINFO
*\--------------------------------------
K.GetDevStatus.A
jsr K.GetDevByID.A
bcs K.GetDevDNF
>STYA ZPPtr1
ldx #DEVMGR.STATUS
jmp (ZPPtr1)
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.DEV
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM