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A2osX/SYS/KERNEL.S.BIN.txt

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
*--------------------------------------
* K.LoadLib.YA
* in :
* Y,A = PTR To "LibName.o" C-String
* out :
* A = hMem To loaded LIB
*--------------------------------------
K.LoadLib.YA jsr BIN.FindLIB
bcs .9
jsr BIN.Load.YA Y,A=filename full path
bcs .9
stx .8+1
>STYA .1+1
txa Pass hLib to LibLoad
ldx #LIBMGR.LOAD
.1 jsr $ffff Self Modified, Call LIB.LOAD function
bcs .99
.8 lda #$ff hLib
clc
.9 rts
.99 pha
lda .8+1
jsr K.FreeMem.A
pla
sec
rts
*--------------------------------------
* K.UnloadLib.A
* in :
* A = hMem To Lib
* out :
*--------------------------------------
K.UnloadLib.A pha
jsr K.GetMemByID.A
>STYA ZPPtr1
ldy #S.MEM.REFCNT
lda (ZPPtr1),y Get count of those referencing this lib
dec only one left ?
beq .1
sta (ZPPtr1),y
pla
clc
rts
.1 ldy #S.MEM.PTR
lda (ZPPtr1),y
sta .2+1
iny
lda (ZPPtr1),y
sta .2+2
ldx #LIBMGR.UNLOAD
.2 jsr $ffff Self Modified, Call LIB.UNLOAD function
pla
jmp K.FreeMem.A
*--------------------------------------
* K.LoadDrv.YA
* in :
* Y,A = PTR to "NAME.DRV [PARAM]" C-String
* out :
* none
*--------------------------------------
K.LoadDrv.YA jsr BIN.FindDRV
bcs .9
jsr BIN.Load.YA Y,A =filename full path
bcs .9
>STYA pDrv
stx .97+1
>LDYA BIN.CmdLine
>STYA ZPPtr1
.1 lda (ZPPtr1) Advance to ARG[1]
pha
inc ZPPtr1
bne .2
inc ZPPtr1+1
.2 pla
bne .1
>LDYA ZPPtr1
jsr pDrvJmp call Dev.Detect
bcs .96
jsr BIN.InstallDRV
bcs .96
jsr .96 Cleanup...
lda #0 Make sure RC = 0 if success
clc
.9 rts
.96 pha
.97 lda #$ff
jsr K.FreeMem.A
pla
rts
*/--------------------------------------
* # FileSearch
* Search a file in the provided PATH list
* And return, if found, the full path to it.
* ## In:
* PUSHW = Ptr to Search Path (CSTR) %LIB%;/SYS/SLIB
* PUSHW = Ptr to File Name (CSTR)
* PUSHW = Ptr to DstBuf
* PUSHW = Ptr to DstStat
* ## Out:
* CC : success
* DstBuf = FilePath
* DstStat = S.STAT
* CS : not found
*\--------------------------------------
K.FileSearch >PULLW .4+1 DstStat
>PULLW .2+1 DstBuf
jsr K.FileSearch.I
bcs .9
ldx #$ff
.1 inx
lda K.Buf256,x
.2 sta $ffff,x Self Modified
bne .1
ldx #S.STAT-1
.3 lda K.S.STAT,x
.4 sta $ffff,x Self Modified
dex
bpl .3
.9 rts
K.FileSearch.I >PULLW .4+1 Filename
>PULLYA Get Search list
jsr K.ExpandStr.YA Expand it
bcs .99
stx .98+1
>STYA .2+1 expanded search list ;
stz .1+1
.1 ldy #$ff Self Modified Index in Search list string
ldx #$0
.2 lda $ffff,y Self Modified, Search list string
beq .3 end of string, try it....
iny
cmp #';'
beq .3
sta K.Buf256,x
inx
bra .2
.3 txa
beq .98 String is empty....nothing to try
sty .1+1 save current index
ldy #$0
.4 lda $ffff,y Self Modified, Append Fiename...
sta K.Buf256,x
beq .5
iny
inx
bra .4
.5 stz K.Buf256+1,x set string ending 0
>PUSHWI K.S.STAT
>PUSHWI K.Buf256
>SYSCALL STAT -> BNK1
bcs .1 Failed...retry next path...
jsr .98 Discard Expanded hSrch list
clc
rts
.98 lda #$ff SELF MODIFIED : Discard Expanded hSrch list
jsr K.FreeMem.A
lda #MLI.ERR.FNOTFND
sec
.99 rts
*--------------------------------------
BIN.FindLIB clc
.HS B0 bcs
BIN.FindDRV sec
>STYA BIN.CmdLine
>LDYAI BIN.Find.ENV.LIB
bcc .1
>LDYAI BIN.Find.ENV.DRV
.1 jsr K.GetEnv.YA get value for Search Path
bcs .9
>PUSHYA
>PUSHW BIN.CmdLine
jsr K.FileSearch.I find LIB/DRV in Search
bcs .9
>LDYAI K.Buf256
.9 rts
*--------------------------------------
BIN.Find.ENV.DRV >CSTR "DRV"
BIN.Find.ENV.LIB >CSTR "LIB"
*--------------------------------------
* BIN.Load.YA
* in :
* A = hMem of FilePath (PSTR)
* out :
* Y,A = MEMPTR
* X = hMem of Code Segment
*--------------------------------------
BIN.Load.YA >STYA BIN.CmdLine
jsr MEM.GetMemByNameYA
bcs BIN.Load.YA.1 not already loaded
>STYA ZPPtr1 Save base address
ldy #S.MEM.REFCNT
lda (ZPPtr1),y
inc
sta (ZPPtr1),y
txa
jmp K.GetMemPtr.A X=hMem from K.GetMemByNameA
*--------------------------------------
BIN.Load.YA.1 >PUSHWI K.S.STAT
>PUSHW BIN.CmdLine
>SYSCALL STAT BANK1!!! Look for AUXTYPE
bcs .9
>LDYA K.S.STAT+S.STAT.P.AUXTYPE
>STYA BIN.Relocate.Start
>PUSHYA Push AUXTYPE
>PUSHBI 6 S.FILEINFO.TYPE.BIN
>PUSHBI SYS.FOpen.R
>PUSHW BIN.CmdLine
>SYSCALL LoadFile BANK1!!!
.9 bcs .99 Error Loading file
stx BIN.hMem save hMem
pha YA=CODE+DATA size
tya
* clc CC from bcs .99
adc BIN.Relocate.Start Get AUXTYPE for actual Base Address
sta BIN.Relocate.End compute Range End=AUXTYPE+FILELEN
pla
adc BIN.Relocate.Start+1
sta BIN.Relocate.End+1
txa
jsr K.GetMemPtr.A
>STYA ZPPtr1 set ZPPtr1 -> Code start
pha YA = actual load address
tya
sec
sbc BIN.Relocate.Start
sta BIN.Relocate.Offset Offset=ZPPtr1-AUXTYPE
pla
sbc BIN.Relocate.Start+1
sta BIN.Relocate.Offset+1
ldy #H.BIN.CODE.LEN get Code Len
lda (ZPPtr1),y
clc
adc ZPPtr1
sta ZPPtr2 Make ZPPtr2 = ZPPtr1 + CodeLen
iny
lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr2+1
jsr BIN.RelocateEXE
>LDYA BIN.CmdLine get back bin path
jsr K.NewStr.YA make a copy of this string
bcs .98
lda BIN.hMem Keep X=hMem
jsr K.GetMemByID.A X unmodified
>STYA ZPPtr1
lda (ZPPtr1)
ora #S.MEM.F.CODE This is a code segment
sta (ZPPtr1)
txa Get Back hMem
ldy #S.MEM.BIN
sta (ZPPtr1),y
lda BIN.hMem
tax return hMEM to Caller...
jsr K.GetMemPtr.A
clc ...and Y,A=PTR to CS
rts
.98 pha
lda BIN.hMem
jsr K.FreeMem.A Discard Loaded Code
pla
sec
.99 rts
*--------------------------------------
BIN.CmdLine .BS 2
BIN.hMem .BS 1
*--------------------------------------
* BIN.InstallDRV
* In:
* pDrv = .DRV File Loaded Address
* Note:
* BIN.Load.YA called from K.LoadDrvYA
* Already setup correctly pDrv,
* BIN.Relocate.Start,End
*--------------------------------------
BIN.InstallDRV ldy #H.BIN.DRV.CODE.O
lda (pDrv),y
clc
adc BIN.Relocate.Start Advance start From AUXTYPE to AUXTYPE+DRV code offset
sta BIN.Relocate.Start
iny
lda (pDrv),y
adc BIN.Relocate.Start+1
sta BIN.Relocate.Start+1
lda DevMgr.Free Offset = Target DRV address-(AUXTYPE+DRV OFFSET)
sec
sbc BIN.Relocate.Start
sta BIN.Relocate.Offset
lda DevMgr.Free+1
sbc BIN.Relocate.Start+1
sta BIN.Relocate.Offset+1
lda BIN.Relocate.End Compute DRVLen=End-start
sec
sbc BIN.Relocate.Start
sta BIN.InstallDRV.DRVLen
lda BIN.Relocate.End+1
sbc BIN.Relocate.Start+1
sta BIN.InstallDRV.DRVLen+1
lda DevMgr.Free
clc
adc BIN.InstallDRV.DRVLen
sta BIN.InstallDRV.DRVEnd
tay Save DRVEnd LO
lda DevMgr.Free+1
adc BIN.InstallDRV.DRVLen+1 A = DRVEnd HI
sta BIN.InstallDRV.DRVEnd+1
bcs .9 we crossed $FFFF, out of mem
cpy #DevMgr.HiMem
sbc /DevMgr.HiMem
bcs .9 No More Room to load Driver....
lda DevMgr.Count
cmp #K.DEV.MAX
bne .10 No Device Handle Left
lda #MEMMGR.ERROOH
sec
rts
.9 lda #MEMMGR.ERROOM
sec
rts
.10 inc DevMgr.Count
>SYSCALL GetDevByID.A
>STYA ZPPtr2 setup Ptr2 to dest HEADER
ldy #H.BIN.DRV.HEADER.O
lda (pDrv),y
clc
adc pDrv
sta ZPPtr1
iny
lda (pDrv),y
adc pDrv+1
sta ZPPtr1+1 set Ptr1 to Src HEADER
ldy #S.DEV-1
.1 lda (ZPPtr1),y copy header to DevMgr.Table
sta (ZPPtr2),y
dey
bpl .1
ldy #S.DEV.DRV.JMP+1 Setup Main JMP
lda DevMgr.Free+1
sta (ZPPtr2),y
tax
dey
lda DevMgr.Free
sta (ZPPtr2),y
sta ZPPtr2 set Ptr2 to Dest CODE
stx ZPPtr2+1
ldy #H.BIN.DRV.CODE.O
lda (pDrv),y
clc
adc pDrv
sta ZPPtr1
iny
lda (pDrv),y
adc pDrv+1
sta ZPPtr1+1 set Ptr1 to Src CODE
lda BIN.InstallDRV.DrvLen+1
eor #$ff
pha
lda BIN.InstallDRV.DrvLen
eor #$ff
tax
ldy #0
.2 inx Move CODE in LC
bne .3
pla
inc
beq .4
pha
.3 lda (ZPPtr1),y
sta (ZPPtr2),y
iny
bne .2
inc ZPPtr1+1
inc ZPPtr2+1
bra .2
.4 ldy #H.BIN.DRV.CODE.LEN
lda DevMgr.Free Make Ptr1 = code start
sta ZPPtr1
clc
adc (pDrv),y
sta ZPPtr2
iny
lda DevMgr.Free+1
sta ZPPtr1+1
adc (pDrv),y
sta ZPPtr2+1 Make ZPPtr2 = ZPPtr1 + CodeLen
jsr BIN.RelocateDRV
>LDYA BIN.InstallDRV.DrvEnd
>STYA DevMgr.Free
clc
rts
*--------------------------------------
BIN.InstallDRV.DrvLen .BS 2
BIN.InstallDRV.DrvEnd .BS 2
*--------------------------------------
* BIN.Relocate___ :
* In :
* ZPPtr1 = Ptr to Code
* ZPPtr2 = End Of Code
*--------------------------------------
BIN.Relocate.Start .BS 2
BIN.Relocate.End .BS 2
BIN.Relocate.Offset .BS 2
*--------------------------------------
BIN.RelocateEXE ldy #H.BIN.HEADER+1
lda (ZPPtr1),y
cmp /H.BIN.HEADER.BIN65
beq .1
cmp /H.BIN.HEADER.DRV65
beq .1
lda #SYSMGR.ERRIBIN
sec
rts
.1 ldy #H.BIN.JMP relocate Main JMP
lda (ZPPtr1),y
clc
adc BIN.Relocate.Offset
sta (ZPPtr1),y
iny
lda (ZPPtr1),y
adc BIN.Relocate.Offset+1
sta (ZPPtr1),y
ldy #H.BIN.EXE.REL.TABLE skip Header, CS.SIZE & DS.SIZE... (16 bytes)
.HS 2C bit abs
*--------------------------------------
BIN.RelocateDRV ldy #H.BIN.DRV.REL.TABLE
.1 lda (ZPPtr1),y Start Relocate JMP table
tax LO in X
iny
ora (ZPPtr1),y ORA with HI
beq .2 $0000 = end of table
dey
txa get back LO
clc
adc BIN.Relocate.Offset
sta (ZPPtr1),y
iny
lda (ZPPtr1),y
adc BIN.Relocate.Offset+1
sta (ZPPtr1),y
iny
bra .1
*--------------------------------------
.2 tya add current offset in Y to Ptr
sec + 1 to skip last 00 from beq .2
adc ZPPtr1
sta ZPPtr1
bcc .3
inc ZPPtr1+1 ZPPtr1=Current Code PTR
.3 lda (ZPPtr1) get OPCODE
lsr /2
tax
lda BIN.OPCODES,x get OPCODE definition
bcs .4 go get LO nibble
lsr
lsr move HI -> LO
lsr
lsr
.4 and #$0f
bit #$8 abs addressing?
beq .6 no....
and #7 save Opcode length...
pha
ldy #1
lda (ZPPtr1),y Get LO
tax save LO in X
iny make Y point to HI
cpx BIN.Relocate.Start
lda (ZPPtr1),y Get HI
sbc BIN.Relocate.Start+1
bcc .5 addr < BIN.Relocate.Start, out of range
txa Get back LO
cpx BIN.Relocate.End
lda (ZPPtr1),y Get HI
sbc BIN.Relocate.End+1
bcs .5 addr > BIN.Relocate.End, out of range
txa Get back LO
* clc CC from bcs .6
adc BIN.Relocate.Offset add Offset to abs address
dey
sta (ZPPtr1),y store relocated addr LO
iny
lda (ZPPtr1),y Get HI
adc BIN.Relocate.Offset+1
sta (ZPPtr1),y store relocated addr HI
.5 pla get back Opcode length...
.6 clc A = OPCODE length
adc ZPPtr1
sta ZPPtr1
bcc .7
inc ZPPtr1+1
.7 eor ZPPtr2 A = ZPPtr1
bne .3
lda ZPPtr1+1
eor ZPPtr2+1
bne .3 next opcode....
.8 rts
*--------------------------------------
* 65C02 OPCODES
* Bit 3 : 1 = absolute addressing
* Bit 2-1-0 : opcode + @ length
*--------------------------------------
* 0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F
BIN.OPCODES .HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS B.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
.HS 1.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
.HS 2.2.2.1.2.2.2.2.1.2.1.1.B.B.B.3
.HS 2.2.2.1.2.2.2.2.1.B.1.1.1.B.B.3
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.BIN
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM
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