A2osX/SYS/KERNEL.S.DEV.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*/--------------------------------------
* # GetDevByID
* **In:** 
* A = DevID
* **Out:**
* CC = OK, CS = ERROR
* Y,A = FD
* X = hFD
*\--------------------------------------
K.GetDevByID	cmp DevMgr.DevCnt
				bcs K.GetDev.NODEV
				tax
				
				lda Dev.Table.hFD,x
				pha
				ldy Dev.Table.pFDLO,x
				lda Dev.Table.pFDHI,x
				plx
				
*				clc				
				
.9				rts						CC		
*/--------------------------------------
* # GetDevByName
* **In:** 
*  Y,A = Ptr to device name (C-String)
* **Out:**
* CC = OK, CS = ERROR
* Y,A = FD
* X = DevID
*\--------------------------------------
K.GetDevByName	>STYA ZPPtr1
				
				ldx #0
				
.1				ldy Dev.Table.pFDLO,x
				lda Dev.Table.pFDHI,x
				
				>STYA ZPPtr2
				
				lda ZPPtr2
				clc
				adc #S.FD.DEV.NAME
				sta ZPPtr3

				lda ZPPtr2+1
				adc #0
				sta ZPPtr3+1
				
				ldy #$ff
				
.2				iny
				lda (ZPPtr1),y
				cmp (ZPPtr3),y
				bne .4

				ora (ZPPtr3),y 			Both char are 0 ?
				bne .2					no....loop
				
				ldy ZPPtr2
				lda ZPPtr2+1
				clc
				rts
				
.4				inx
				cpx DevMgr.DevCnt
				bne .1

K.GetDev.NODEV	lda #MLI.E.NODEV
				sec
K.GetDev.9		rts
*/--------------------------------------
* # GetDevStatus
* ## C 
* `int getdevstatus(short int hFD, S.DIB* dstat);`
* ## ASM
* **In:** 
* `>PUSHWI S.DIB`
* `lda DevID`
* `>SYSCALL GetDevStatus`
* **Out:**
*\--------------------------------------
K.GetDevStatus	jsr K.GetMemPtr
				>STYA pFD

				>PULLW K.S.IOCTL+S.IOCTL.BUFPTR

				lda #S.IOCTL.STATCODE.GETDIB
K.GetDevStatus.I				
				sta K.S.IOCTL+S.IOCTL.STATCODE

				jsr K.IOCTL.GetPDrv
				
				>LDYAI K.S.IOCTL
				
				ldx #IOCTL.STATUS
				jmp (pDrv)
*/--------------------------------------
* # MKDev
* **In:** 
*  Y,A = Ptr to FD.DEV
* **Out:**
*  A = DEVID
*\--------------------------------------
K.MKDev			>STYA .1+1

				ldx DevMgr.DevCnt
				cmp #K.DEV.MAX
				beq .9
				
				>LDYAI S.FD.DEV 
				ldx #S.MEM.F.FD
				jsr MEM.GetMem.YAX
				bcs .99
				>STYA pFD
				phx
				
				ldx DevMgr.DevCnt
				sta Dev.Table.pFDHI,x
				tya
				sta Dev.Table.pFDLO,x
				pla
				sta Dev.Table.hFD,x
				
				ldy #S.FD.DEV-1
				
.1				lda $ffff,y				SELF MODIFIED
.2				sta (pFD),y
				dey
				bpl .1
				
				>LDYAI K.IOBuf
				>STYA K.S.IOCTL+S.IOCTL.BUFPTR

				lda #S.IOCTL.STATCODE.STATUS
				
				jsr K.GetDevStatus.I
				bcs .99
				
				lda K.IOBuf
				ldx DevMgr.DevCnt
				sta Dev.Table.F,x
				
				txa
				inc DevMgr.DevCnt
				rts
				
.9				lda #K.E.OOH
*				sec
.99				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.DEV
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM