A2osX/SYS/KERNEL.S.BIN.txt

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PR#3
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PREFIX /A2OSX.SRC
LOMEM $A00
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INC 1
AUTO 6
*--------------------------------------
* BIN.LoadExeYA
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* in :
* A = hMem of FilePath (PSTR)
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* out :
* Y,A = MEMPTR
* X = hMem of Code Segment
*--------------------------------------
K.LoadEXEYA >STYA K.LoadEXEYA.Filename
>SYSCALL PStrUprYA Y,A unmodified
jsr MEM.GetMemByNameYA
bcs K.LoadEXEYA.1 not already loaded
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>STYA ZPPtr1 Save base address
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ldy #S.MEM.REFCNT
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lda (ZPPtr1),y
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inc
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sta (ZPPtr1),y
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txa
jmp K.GetMemPtrA X=hMem from K.GetMemByNameA
*--------------------------------------
K.LoadEXEYA.1 >PUSHWI KrnBuf256
>PUSHW K.LoadEXEYA.Filename
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jsr K.STAT Look for AUXTYPE
bcs .9
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>LDYA KrnBuf256+S.STAT.P.AUXTYPE
>STYA BIN.Relocate.Start
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>PUSHYA Push AUXTYPE
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>PUSHBI 6 S.FILEINFO.TYPE.BIN
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>PUSHBI SYS.FOpen.R
>PUSHW K.LoadEXEYA.Filename
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jsr K.LoadFile
.9 bcs .99 Error Loading file
stx K.LoadEXEYA.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.GetMemPtrA
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>STYA ZPPtr1 set ZPPtr1 -> Code start
pha YA = actual load address
tya
sec
sbc BIN.Relocate.Start
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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
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lda (ZPPtr1),y
clc
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adc ZPPtr1
sta ZPPtr2 Make ZPPtr2 = ZPPtr1 + CodeLen
iny
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lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr2+1
jsr BIN.RelocateEXE
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>LDYA K.LoadEXEYA.Filename get back bin path
>SYSCALL NewPStrYA make a copy of this string
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bcs .98
lda K.LoadEXEYA.hMem Keep X=hMem
jsr K.GetMemByIDA X unmodified
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>STYA ZPPtr1
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lda (ZPPtr1)
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ora #S.MEM.F.CODE This is a code segment
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sta (ZPPtr1)
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txa Get Back hMem
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ldy #S.MEM.BIN
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sta (ZPPtr1),y
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lda K.LoadEXEYA.hMem
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tax return hMEM to Caller...
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jsr K.GetMemPtrA
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clc ...and Y,A=PTR to CS
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rts
.98 pha
lda K.LoadEXEYA.hMem
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jsr K.FreeMemA Discard Loaded Code
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pla
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sec
.99 rts
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*--------------------------------------
K.LoadEXEYA.Filename .BS 2
K.LoadEXEYA.hMem .BS 1
*--------------------------------------
* BIN.InstallDRV
* In:
* pDrv = .DRV File Loaded Address
* Note:
* K.LoadEXEYA 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
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sta BIN.InstallDRV.DRVLen
lda BIN.Relocate.End+1
sbc BIN.Relocate.Start+1
sta BIN.InstallDRV.DRVLen+1
lda DevMgr.Free
clc
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adc BIN.InstallDRV.DRVLen
sta BIN.InstallDRV.DRVEnd
tay Save DRVEnd LO
lda DevMgr.Free+1
adc BIN.InstallDRV.DRVLen+1 A = DRVEnd HI
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sta BIN.InstallDRV.DRVEnd+1
bcs .9 we crossed $FFFF, out of mem
cpy #DevMgr.HiMem
sbc /DevMgr.HiMem
bcs .9 No More Room to load Driver....
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lda DevMgr.Count
cmp #K.DEV.MAX
bne .10 No Device Handle Left
lda #DEVMGR.ERROOH
sec
rts
.9 lda #DEVMGR.ERROOM
sec
rts
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.10 inc DevMgr.Count
>SYSCALL GetDevByIDA
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>STYA ZPPtr2 setup Ptr2 to dest HEADER
ldy #H.BIN.DRV.HEADER.O
lda (pDrv),y
clc
adc pDrv
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sta ZPPtr1
iny
lda (pDrv),y
adc pDrv+1
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sta ZPPtr1+1 set Ptr1 to Src HEADER
ldy #S.DEV-1
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.1 lda (ZPPtr1),y copy header to DevMgr.Table
sta (ZPPtr2),y
dey
bpl .1
ldy #S.DEV.DRV.JMP+1 Setup Main JMP
lda DevMgr.Free+1
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sta (ZPPtr2),y
tax
dey
lda DevMgr.Free
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sta (ZPPtr2),y
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sta ZPPtr2 set Ptr2 to Dest CODE
stx ZPPtr2+1
ldy #H.BIN.DRV.CODE.O
lda (pDrv),y
clc
adc pDrv
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sta ZPPtr1
iny
lda (pDrv),y
adc pDrv+1
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sta ZPPtr1+1 set Ptr1 to Src CODE
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lda BIN.InstallDRV.DrvLen+1
eor #$ff
pha
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lda BIN.InstallDRV.DrvLen
eor #$ff
tax
ldy #0
.2 inx Move CODE in LC
bne .3
pla
inc
beq .4
pha
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.3 lda (ZPPtr1),y
sta (ZPPtr2),y
iny
bne .2
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inc ZPPtr1+1
inc ZPPtr2+1
bra .2
.4 ldy #H.BIN.DRV.CODE.LEN
lda DevMgr.Free Make Ptr1 = code start
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sta ZPPtr1
clc
adc (pDrv),y
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sta ZPPtr2
iny
lda DevMgr.Free+1
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sta ZPPtr1+1
adc (pDrv),y
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sta ZPPtr2+1 Make ZPPtr2 = ZPPtr1 + CodeLen
jsr BIN.RelocateDRV
>LDYA BIN.InstallDRV.DrvEnd
>STYA DevMgr.Free
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clc
rts
*--------------------------------------
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BIN.InstallDRV.DrvLen .BS 2
BIN.InstallDRV.DrvEnd .BS 2
*--------------------------------------
* BIN.Relocate___ :
* In :
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* 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
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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
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lda (ZPPtr1),y
clc
adc BIN.Relocate.Offset
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sta (ZPPtr1),y
iny
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lda (ZPPtr1),y
adc BIN.Relocate.Offset+1
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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
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.1 lda (ZPPtr1),y Start Relocate JMP table
tax LO in X
iny
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ora (ZPPtr1),y ORA with HI
beq .2 $0000 = end of table
dey
txa get back LO
clc
adc BIN.Relocate.Offset
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sta (ZPPtr1),y
iny
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lda (ZPPtr1),y
adc BIN.Relocate.Offset+1
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sta (ZPPtr1),y
iny
bra .1
*--------------------------------------
.2 tya add current offset in Y to Ptr
sec + 1 to skip last 00 from beq .2
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adc ZPPtr1
sta ZPPtr1
bcc .3
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inc ZPPtr1+1 ZPPtr1=Current Code PTR
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.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
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lda (ZPPtr1),y Get LO
tax save LO in X
iny make Y point to HI
cpx BIN.Relocate.Start
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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
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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
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sta (ZPPtr1),y store relocated addr LO
iny
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lda (ZPPtr1),y Get HI
adc BIN.Relocate.Offset+1
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sta (ZPPtr1),y store relocated addr HI
.5 pla get back Opcode length...
.6 clc A = OPCODE length
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adc ZPPtr1
sta ZPPtr1
bcc .7
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inc ZPPtr1+1
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.7 eor ZPPtr2 A = ZPPtr1
bne .3
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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
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*--------------------------------------
MAN
SAVE SYS/KERNEL.S.BIN
LOAD SYS/KERNEL.S
ASM