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A2osX/BIN/ASM.S.SRC.txt
Rémy GIBERT 33b83bd24f Kernel version 0.9 : Workspace Reorg #1
2017-06-16 15:01:08 +02:00

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PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
.LIST OFF
*---------------------------------------
SRC.PrintLine ldy #ASM.MACRO.ON
lda (pData),y
bpl .1
ldy #ASM.LI.CON
lda (pData),y
bpl .9
bmi .8
.1 ldy #ASM.LI.ON
lda (pData),y
bpl .9
.8 >PUSHWI UsrBuf256
>PUSHW SRC.LINENUM
ldy #ASM.PC+1
>PUSHB (pData),y
dey
>PUSHB (pData),y
>LDYA L.MSG.SRCLINE
>SYSCALL CPrintFYA
.9 rts
*---------------------------------------
SRC.PrintLineErr ldx #0
.1 lda UsrBuf256,x
beq .2
phx
>SYSCALL PutCA
plx
inx
bcc .1
rts
.2 lda #13
>SYSCALL PutCA
bcs .9
ldx #0
.3 lda UsrBuf256,x
beq .5
inx
cpx SRC.BufPtr
beq .4
phx
lda #'-'
>SYSCALL PutCA
plx
bcs .9
bra .3
.4 lda #'^'
phx
>SYSCALL PutCA
plx
bcs .9
.5 lda #13
>SYSCALL PutCA
.9 rts
*---------------------------------------
SRC.ParseLine ldx UsrBuf256
beq .1
cpx #'*' Comment?
beq .1
cpx #';' Comment?
beq .1
ldy #ASM.DO.ON
lda (pData),y
bne .1
stz SRC.GLabel.New
cpx #' ' no label...go scan dir/opcode
beq .4
cpx #'.' local symbol?
bne .2
jsr SRC.ParseLine.SymL
bra .3
.1 clc
rts
.2 jsr SRC.ParseLine.SymG
.3 bcs SRC.ParseLine.Err
.4 jsr SRC.GetCharNB Scan for an Opcode...
beq SRC.ParseLine.Ok
cmp #'.'
bne .5
jsr SRC.ParseLine.Dir
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
.5 cmp #'>'
bne .6
jsr SRC.ParseLine.Exec.Macro
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
.6 dec SRC.BufPtr Back one char...
jsr SRC.ParseLine.OpCode
bcs SRC.ParseLine.Err
SRC.ParseLine.Ok lda SRC.GLabel.New
bpl .8
ldy #ASM.PASS
lda (pData),y pass#2?
bne .8 yes, nothing to do
* --- Pass #1
>LDYA L.SRC.GLabel.Flags
jsr SYM.SearchGlobal
bcs .1 if CS, not found, add
lda SRC.FLabel.Flags
bit #$40 found symbol pending ?
bne .2 yes, update
bit #$1 found is .SE ?
beq SRC.ParseLine.Redef no, redefine error
.2 ldx #0 update current symbol with
.3 lda SRC.GLabel.Flags flags & value
jsr SYM.AddByteGBlock
inx
cpx #5
bne .3
bra .8
.1 >LDYA L.SRC.GLabel.Flags
jsr SYM.AddGToGBlockYA
bcs SRC.ParseLine.Err
.8 clc
rts
SRC.ParseLine.Inv lda #ERR.INVALID.LABEL
SRC.ParseLine.Err sec
rts
SRC.ParseLine.Redef lda #ERR.SYMBOL.REDEFINE
sec
rts
*---------------------------------------
SRC.ParseLine.SymP jsr SRC.GetChar
beq SRC.ParseLine.SymE
jsr SRC.GetDecimal
bcs SRC.ParseLine.SymE
jmp SYM.AddPrivate
*---------------------------------------
SRC.ParseLine.SymL jsr SRC.GetChar
beq SRC.ParseLine.SymE
jsr SRC.GetDecimal
bcs SRC.ParseLine.SymE
lda SRC.ACC+1
ora SRC.ACC+2
ora SRC.ACC+3
bne SRC.ParseLine.SymE Max .255
lda SRC.ACC
beq SRC.ParseLine.SymE .0 is not allowed
sta SRC.LLabel.ID
ldy #ASM.PC
lda (pData),y
ldy #ASM.PC.GLABEL
sec
sbc (pData),y
sta SRC.LLabel.Offset
ldy #ASM.PC+1
lda (pData),y
ldy #ASM.PC.GLABEL+1
sbc (pData),y
bne SRC.ParseLine.SymR
ldy #ASM.PC+2
lda (pData),y
ldy #ASM.PC.GLABEL+2
sbc (pData),y
bne SRC.ParseLine.SymR
ldy #ASM.PC+3
lda (pData),y
ldy #ASM.PC.GLABEL+3
sbc (pData),y
bne SRC.ParseLine.SymR
bcc SRC.ParseLine.SymR
jmp SYM.AddLToGBlock
*---------------------------------------
SRC.ParseLine.SymE lda #ERR.INVALID.LABEL
sec
rts
SRC.ParseLine.SymR lda #ERR.RANGE
sec
rts
*---------------------------------------
SRC.ParseLine.SymG >LDYA L.SRC.GLabel.Len
jsr SRC.GetLabel
bcs SRC.ParseLine.SymE
ldx #3 Makes Current Label = PC for now
ldy #ASM.PC+3
.1 lda (pData),y
sta SRC.GLabel.Value,x
dey
dex
bpl .1
ldx #3 Makes Current Label = Ref for next local
ldy #ASM.PC.GLABEL+3
.2 lda SRC.GLabel.Value,x
sta (pData),y
dey
dex
bpl .2
lda #$80 Mark GLabel Flag...
sta SRC.GLabel.Flags
sta SRC.GLabel.New
clc
rts
*---------------------------------------
SRC.ParseLine.Dir >LDYA L.T.DIRECTIVES
jsr SRC.GetKeyword
bcs .9
jmp (J.DIRECTIVES,x)
.9 lda #ERR.INVALID.DIRECTIVE
sec
rts
*---------------------------------------
SRC.ParseLine.Exec.Macro
clc
rts
*---------------------------------------
SRC.ParseLine.Add.Macro
clc
rts
*---------------------------------------
SRC.ParseLine.OpCode
jsr SRC.GetArg
bcc .11
rts
.11 ldy #ASM.T.hMem
lda (pData),y
>SYSCALL GetMemPtrA
>STYA ZPPtr1
ldy #ASM.T.O setup Ptr to Opcodes
lda (ZPPtr1),y
clc
adc ZPPtr1
sta ZPPtr2
iny
lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr2+1
ldy #ASM.T.R setup Ptr to Registers
lda (ZPPtr1),y
clc
adc ZPPtr1
sta ZPPtr3
iny
lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr3+1
.10 lda (ZPPtr2)
ldy #1
ora (ZPPtr2),y
beq .9
ldx #$FF
.1 inx
lda SRC.Buffer,x
iny
cmp (ZPPtr2),y
bne .7
cpx SRC.Buffer
bne .1
jsr SRC.ParseLine.AM
bcs .99
bcc .20
ldx SRC.AM.StrBuf
beq .20
ldx #0
.21 inx
lda SRC.AM.StrBuf,x
phx
>SYSCALL PutCA
plx
cpx SRC.AM.StrBuf
bne .21
lda #13
>SYSCALL PutCA
.20 ldy #ASM.PC
lda (pData),y
inc
sta (pData),y
bne .2
iny
lda (pData),y
inc
sta (pData),y
.2 clc
rts
.7 lda ZPPtr1
clc
adc (ZPPtr2)
tax
lda ZPPtr1+1
ldy #1
adc (ZPPtr2),y
stx ZPPtr2
sta ZPPtr2+1
bra .10
.9 lda #ERR.INVALID.OPCODE
sec
.99 rts
*---------------------------------------
SRC.ParseLine.AM stz SRC.AM.ID
stz SRC.AM.StrBuf
.1 jsr SRC.GetCharUC any arg immediately after ' '?
beq .8 no, AM.ID=0 (implied)
cmp #' ' another space ?
beq .8 ignore end of line (comment)
jsr SRC.IsAMReserved
bcs .2
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
bra .1
.8 clc
rts
.2 jsr SRC.IsMODReserved
bcs .21
lda #'#'
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
bra .1
.21 jsr SRC.IsLetter Any register?
bcs .70 no, try something else
ldx SRC.BufPtr
stx SRC.BufPtrSave
stz SRC.AM.tmpBuf
sta SRC.AM.tmpBuf+1
inc SRC.AM.tmpBuf
.3 jsr SRC.GetCharUC
beq .41
jsr SRC.IsLetterOrDigit
bcs .4
inc SRC.AM.tmpBuf
ldx SRC.AM.tmpBuf
sta SRC.AM.tmpBuf,x
bra .3
.4 dec SRC.BufPtr back one char
.41 ldy #0
.5 lda (ZPPtr3),y
beq .71 last register ?
phy
ldx #$ff
.6 lda (ZPPtr3),y
iny
inx
cmp SRC.AM.tmpBuf,x
bne .7
cpx SRC.AM.tmpBuf
bne .6
ply
ldy #0 register match, add to AM string
ldx SRC.AM.StrBuf
.61 iny
lda SRC.AM.tmpBuf,y
inx
sta SRC.AM.StrBuf,x
cpy SRC.AM.tmpBuf
bne .61
stx SRC.AM.StrBuf
jmp .1
.7 ply
tya
sec
adc (ZPPtr3),y
tay
bra .5
.71 lda SRC.BufPtrSave Does not match a register,restore Ptr
sta SRC.BufPtr
.70 dec SRC.BufPtr back one char
jsr EXP.Eval
bcs .99
ldx #3
.73 lda SRC.ACC,x
bne .72
dex
bne .73
.72 inx
txa
ora #$30
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
jmp .1
clc
rts
.9 lda #ERR.INVALID.AM.SYN
sec
.99 rts
*---------------------------------------
SRC.GetDecimal stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit10
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
beq .88
jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
jsr SRC.IsDigit10
bcs .99
and #$0F
pha
jsr SRC.ACC10
pla
bcs .9
adc SRC.ACC
sta SRC.ACC
bcc .1
inc SRC.ACC+1
bne .1
inc SRC.ACC+2
bne .1
inc SRC.ACC+3
bne .1
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.88 dec SRC.BufPtr Back One Char
.8 clc
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetHex stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit16
bcs .99
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
beq .88
jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
jsr SRC.IsDigit16
bcs .99
ldx #4
.2 asl SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .2
ora SRC.ACC
sta SRC.ACC
bra .1
.88 dec SRC.BufPtr Back One Char
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetOctal stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit8
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
beq .88
jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
jsr SRC.IsDigit8
bcs .99
asl
asl
asl
asl
asl
ldx #3
.2 asl
rol SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .2
bra .1
.88 dec SRC.BufPtr Back One Char
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetBinary stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
cmp #'1'
beq .10
cmp #'0'
bne .99
.10 and #$01
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
beq .88
jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
cmp #'1'
beq .11
cmp #'0'
bne .8
.11 lsr
rol SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
bra .1
.88 dec SRC.BufPtr Back One Char
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetLabel >STYA ZPPtr1
jsr SRC.GetCharUC
beq .9
jsr SRC.IsLetter
bcs .9
ldy #1
sta (ZPPtr1),y
.1 jsr SRC.GetCharUC
beq .8
jsr SRC.IsLetterOrDigit
bcc .2
cmp #'.'
beq .2
cmp #'_'
beq .2
cmp #' '
beq .88
jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
.9 lda #ERR.SYNTAX.ERROR
sec
rts
.2 iny
sta (ZPPtr1),y
cpy #SRC.GLABEL.MAXLEN
bcc .1 if equ Carry is set
.88 dec SRC.BufPtr Back One Char
.8 tya
sta (ZPPtr1)
clc
rts
*---------------------------------------
SRC.GetKeyword >STYA ZPPtr1
jsr SRC.GetArg
bcs .9
stz SRC.Keyword.ID
ldy #0
.3 lda (ZPPtr1),y
beq .9
cmp SRC.Buffer
bne .6
phy
ldx #0
.4 iny
inx
lda (ZPPtr1),y
cmp SRC.Buffer,x
bne .5
cpx SRC.Buffer
bne .4
ply
ldx SRC.Keyword.ID
clc
rts
.5 ply
.6 tya
sec Add keyword Len+1
adc (ZPPtr1),y
tay
inc SRC.Keyword.ID
inc SRC.Keyword.ID
bra .3
.9 sec
rts
*---------------------------------------
SRC.GetArg jsr SRC.GetCharUC
beq .9
sta SRC.Buffer+1
ldy #1
.1 jsr SRC.GetCharUC
beq .2
cmp #' '
beq .2
iny
sta SRC.Buffer,y
bra .1
.2 sty SRC.Buffer
clc
rts
.9 sec
rts
*---------------------------------------
SRC.IsAMReserved ldx SRC.AM.RESERVED
.1 cmp SRC.AM.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
SRC.IsMODReserved ldx SRC.MOD.RESERVED
.1 cmp SRC.MOD.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
SRC.IsEXPReserved ldx SRC.EXP.RESERVED
.1 cmp SRC.EXP.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
SRC.IsLetterOrDigit jsr SRC.IsDigit10
bcc SRC.IsLetterRTS
*---------------------------------------
SRC.IsLetter cmp #'A'
bcc .9
cmp #'Z'+1
bcc SRC.IsLetterRTS
cmp #'a'
bcc .9
cmp #'z'+1
rts CC if lowercase
.9 sec
SRC.IsLetterRTS rts
*---------------------------------------
SRC.IsDigit16 jsr SRC.IsDigit10
bcc .8
cmp #'A'
bcc .9
cmp #'F'+1
bcc .1
rts cc if ok, cs if not
.1 sbc #'A'-11 cc so A->10 (11-CC)
clc
.8 and #$0F
rts
.9 sec
rts
*---------------------------------------
SRC.IsDigit10 cmp #'0'
bcc .9
cmp #'9'+1
rts cc if ok, cs if not
.9 sec
rts
*---------------------------------------
SRC.IsDigit8 cmp #'0'
bcc .9
cmp #'7'+1
rts cc if ok, cs if not
.9 sec
rts
*---------------------------------------
SRC.GetCharNB jsr SRC.GetCharUC
beq .9
cmp #' '
beq SRC.GetCharNB
.9 rts
*---------------------------------------
SRC.GetCharUC jsr SRC.GetChar
beq .9
cmp #'a'
bcc .9
cmp #'z'+1
bcs .9
eor #$20 to Uppercase
.9 rts
*---------------------------------------
SRC.GetChar ldx SRC.BufPtr
lda UsrBuf256,x
beq .9
inc SRC.BufPtr if 255, will make Z
.9 rts
*---------------------------------------
SRC.ACC10 lda SRC.ACC ACC*2-> ACC & ACCTMP
asl
sta SRC.ACC
sta SRC.ACCTMP
lda SRC.ACC+1
rol
sta SRC.ACC+1
sta SRC.ACCTMP+1
lda SRC.ACC+2
rol
sta SRC.ACC+2
sta SRC.ACCTMP+2
lda SRC.ACC+3
rol
sta SRC.ACC+3
sta SRC.ACCTMP+3
bcs .9
ldx #2
.1 asl SRC.ACC ACC=ACC*4
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .1
lda SRC.ACC CC from ROL SRC.ACC+3
adc SRC.ACCTMP
sta SRC.ACC
lda SRC.ACC+1
adc SRC.ACCTMP+1
sta SRC.ACC+1
lda SRC.ACC+2
adc SRC.ACCTMP+2
sta SRC.ACC+2
lda SRC.ACC+3
adc SRC.ACCTMP+3
sta SRC.ACC+3 CS if overflow
.9 rts
*---------------------------------------
MAN
SAVE /A2OSX.SRC/BIN/ASM.S.SRC
LOAD /A2OSX.SRC/BIN/ASM.S
ASM
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