Apple-2-SW/A2osX
1
0
Fork 0
mirror of https://github.com/A2osX/A2osX.git synced 2024-11-26 13:49:18 +00:00
Code Issues Projects Releases Wiki Activity
005c2ee1c6
A2osX/BIN/ASM.S.SRC.txt
Rémy GIBERT 3e6ecb55e5 Kernel 0.9.2
2018-06-21 17:12:10 +02:00

1127 lines
18 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*---------------------------------------
SRC.ParseLine jsr OUT.Reset
jsr SRC.GetChar
bcs .8
cmp #'*' Comment?
beq .8
cmp #';' Comment?
beq .8
>LDA.G ASM.DO.StackPtr
beq .1
clc
adc #ASM.DO.Stack-1
tay
lda (pData),y
beq .8
.1 >LDA.G ASM.MA.ON
bmi SRC.ParseLine.MACRO
jmp SRC.ParseLine.LABEL
.8 clc
rts
*---------------------------------------
SRC.ParseLine.Macro
lda (ZPLinePtr)
cmp #' ' No label, scan to DIR/OP if any
bne .1
jsr SRC.GetNextCharNB
bcs .8
lda #' ' Store ONE blank
jsr MAC.AddChar
bcs .90
lda (ZPLinePtr) get back non blank char
bra .2
.1 jsr MAC.AddChar
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .1
jsr MAC.AddChar
.90 bcs .99
jsr SRC.GetNextCharNB
bcs .80
.2 cmp #'.' Directive ?
bne .4
ldy #1
lda (ZPLinePtr),y
beq .3
cmp #'E'
beq .21
cmp #'e'
bne .3
.21 iny
lda (ZPLinePtr),y
beq .3
cmp #'M'
beq .22
cmp #'m'
bne .3
.22 jsr MAC.Store
bcs SRC.ParseLine.RTS
>STZ.G ASM.MA.ON
.8 clc
rts
.80 lda #0
jmp MAC.AddChar
.3 lda (ZPLinePtr)
.4 jsr MAC.AddChar
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .4
jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .80 Comments...
pha
lda #' '
jsr MAC.AddChar
pla
bcs .99
.5 jsr MAC.AddChar Store ARG....
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .5
lda #0
jmp MAC.AddChar End of Line
clc
rts
.99 lda #ERR.MACRO.TOO.BIG
sec
SRC.ParseLine.RTS
rts
*---------------------------------------
SRC.ParseLine.LABEL
jsr SRC.GetChar
cmp #' ' no label...go scan dir/opcode
beq SRC.ParseLine.DirOp
cmp #'.' local symbol?
bne .1
lda (ZPGlobalBuf) Not relative to Global label...
beq SRC.ParseLine.InvLbl
jsr SRC.GetNextChar
bcs SRC.ParseLine.InvLbl
jsr SRC.GetDecimal
bcs SRC.ParseLine.InvLbl
lda SRC.ACC+1
ora SRC.ACC+2
ora SRC.ACC+3
bne SRC.ParseLine.InvLbl Max .255
lda SRC.ACC
beq SRC.ParseLine.InvLbl .0 is not allowed
jsr SYM.NewOrGetLocalA
bcs SRC.ParseLine.RTS
bra SRC.ParseLine.DirOp
.1 jsr SYM.FlushGlobal Close & store Previous Global
bcs SRC.ParseLine.RTS
jsr SYM.NewOrGetGlobal
bcs SRC.ParseLine.RTS
*---------------------------------------
SRC.ParseLine.DirOp
jsr SRC.GetNextCharNB Scan for an Opcode...
bcs SRC.ParseLine.Ok
cmp #'.'
bne .5
jsr SRC.GetNextChar
bcs SRC.ParseLine.InvDir
jsr SRC.ParseLine.Dir
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
.5 cmp #'>'
bne SRC.ParseLine.OpCode
jsr SRC.ParseLine.ExecMacro
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
SRC.ParseLine.Ok
clc
SRC.ParseLine.Err
rts
SRC.ParseLine.InvLbl
lda #ERR.INV.LABEL
sec
rts
SRC.ParseLine.InvDir
lda #ERR.INV.DIR
sec
rts
*---------------------------------------
SRC.ParseLine.Dir
>LDYA L.T.DIRECTIVES
jsr SRC.GetKeyword
bcs SRC.ParseLine.InvDir
jmp (J.DIRECTIVES,x)
*---------------------------------------
SRC.ParseLine.ExecMacro
jsr SRC.GetNextChar skip '>'
bcs .90
jsr MAC.Lookup
bcs .90
>LDA.G ASM.MA.StackPtr
cmp #MA.MAXDEPTH
beq .91
clc
adc #ASM.MA.StackPtr
tay
>INC.G ASM.MA.StackPtr
clc
rts
.90 lda #ERR.MACRO.INV
sec
rts
.91 lda #ERR.MACRO.INV
sec
rts
*---------------------------------------
SRC.ParseLine.OpCode
stz SRC.AM.StrBuf
>LDYA ZPOpsPtr
>STYA ZPOpDefPtr
.1 lda (ZPOpDefPtr) End Of OpCode List
ldy #1
ora (ZPOpDefPtr),y
beq .9
lda ZPOpDefPtr
clc
adc #2
sta ZPPtr2
lda ZPOpDefPtr+1
adc #0
sta ZPPtr2+1
lda (ZPPtr2)
tax
ldy #0
.2 lda (ZPLinePtr),y
beq .7
cmp #'a'
bcc .3
cmp #'z'+1
bcs .3
eor #$20
.3 iny
cmp (ZPPtr2),y
bne .7
dex
bne .2
lda (ZPLinePtr),y
beq .8 End of Line, no AM
cmp #' ' A space after opcode ?
bne .7
tya
sec skip OP + ' '
adc ZPLinePtr
sta ZPLinePtr
bcc .5
inc ZPLinePtr+1
.5 bra SRC.ParseLine.AM
.7 lda ZPOpDefPtr
clc
adc (ZPOpDefPtr)
tax
lda ZPOpDefPtr+1
ldy #1
adc (ZPOpDefPtr),y
stx ZPOpDefPtr
sta ZPOpDefPtr+1
bra .1
.8 jmp SRC.ParseLine.OPAMCheckFF
.9 lda #ERR.INV.OPCODE
sec
.99 rts
*---------------------------------------
SRC.ParseLine.AM
.1 jsr SRC.GetChar
bcs SRC.ParseLine.AMCheck
.10 cmp #' ' another space ?
beq SRC.ParseLine.AMCheck ignore end of line (comment)
jsr SRC.IsAMReserved
bcs .2
jsr SRC.AddToBuf
bra .7
.2 jsr SRC.IsLetter Any register?
bcs .6 no, try something else
>LDYA ZPRPtr Check in register table
jsr SRC.GetKeyword
bcs .6
lda (ZPPtr1) get register len
tax
.4 inc ZPPtr1
bne .5
inc ZPPtr1+1
.5 lda (ZPPtr1)
jsr SRC.AddToBuf
dex
bne .4
bra .1
.6 jsr EXP.Eval
bcs .99
>LDA.G EXP.Prefix
beq .75
jsr SRC.AddToBuf
.75 ldx #2
.74 lda SRC.ACC.SIZE
beq .72 Pending...assume 2 bytes...
tax
.73 lda SRC.ACC-1,x
bne .72
dex
bne .73
inx
.72 lda #'a'
.71 jsr SRC.AddToBuf
dex
bne .71
bra .1
.7 jsr SRC.GetNextChar
bcc .10
jmp SRC.ParseLine.AMCheck
.9 lda #ERR.INV.AM.SYN
sec
.99 rts
*---------------------------------------
SRC.ParseLine.AMCheck
* jsr OUT.PrintLine.1
* >PUSHW L.SRC.AM.StrBuf
* >LDYA L.MSG.PSTRCRLF
* >SYSCALL printf
* >DEBUG
lda SRC.AM.StrBuf
beq SRC.ParseLine.OPAMCheckFF
>LDYA ZPAMPtr
>STYA ZPPtr1
ldx #0
.1 inx
lda (ZPPtr1)
beq .9
cmp SRC.AM.StrBuf
bne .7
tay
.2 lda (ZPPtr1),y
cmp SRC.AM.StrBuf,y
bne .6
dey
bne .2
txa
>STA.G SRC.AMID
bra SRC.ParseLine.OPAMCheck
.6 lda (ZPPtr1)
.7 sec
adc ZPPtr1
sta ZPPtr1
bcc .1
inc ZPPtr1+1
bra .1
.9 lda #ERR.INV.AM
sec
rts
*---------------------------------------
SRC.ParseLine.OPAMCheckFF
lda #$ff Default to no AM
>STA.G SRC.AMID
SRC.ParseLine.OPAMCheck
ldy #2 Skip nPtr+Len+OP
lda (ZPOpDefPtr),y LEN
sec LEN Byte
adc #2 nPtr
adc ZPOpDefPtr
sta ZPOpDefPtr
bcc .10
inc ZPOpDefPtr+1
.10 lda (ZPOpDefPtr)
.1 >CMP.G SRC.AMID
beq SRC.ParseLine.Emit
ldy #1
lda (ZPOpDefPtr),y
inc
sec
adc ZPOpDefPtr
sta ZPOpDefPtr
bcc .2
inc ZPOpDefPtr+1
.2 lda (ZPOpDefPtr)
bne .1
.99 lda #ERR.INV.AM.4.OC
sec
rts
*---------------------------------------
SRC.ParseLine.Emit
stz SRC.ACCTMP index in ACC
ldy #1
lda (ZPOpDefPtr),y
sta SRC.ACCTMP+1 Char Count in AM
iny
.4 lda (ZPOpDefPtr),y
cmp #'a
bcs .5 lowercase, go compute address
jsr SRC.IsDigit16
asl
asl
asl
asl
sta SRC.ACCTMP+2
iny
dec SRC.ACCTMP+1
lda (ZPOpDefPtr),y
jsr SRC.IsDigit16
ora SRC.ACCTMP+2
.50 jsr OUT.EmitByte
bcs .9
iny
dec SRC.ACCTMP+1
bne .4
clc
rts
.5 bne .6 cmp #'a'....
ldx SRC.ACCTMP
inc SRC.ACCTMP
lda SRC.ACC,x
bra .50
.6 cmp #'r
bne .7
lda SRC.ACC.SIZE
beq .50 Emit 00 if pending symbol (pass #1)
jsr SRC.ComputeRel8
bcs .91
bra .50
.7 cmp #'l
bne .90
lda SRC.ACC.SIZE
bne .71
jsr OUT.EmitByte Emit 00 00 if pending symbol (pass #1)
bcs .9
lda #0
bra .50
.71 jsr SRC.ComputeRel16
bcs .91
lda SRC.ACC
jsr OUT.EmitByte
bcs .9
lda SRC.ACC+1
bra .50
.8 clc
.9 rts
.90 lda #ERR.INV.T.FILE
sec
rts
.91 lda #ERR.RANGE
sec
rts
*---------------------------------------
SRC.AddToBuf inc SRC.AM.StrBuf
ldy SRC.AM.StrBuf
sta SRC.AM.StrBuf,y
rts
*---------------------------------------
SRC.ComputeRel8 jsr SRC.ComputeRel
bcc .1
* positive : check 0<r<0000007F
lda SRC.ACC+3
ora SRC.ACC+2
ora SRC.ACC+1
bne .9
lda SRC.ACC
bmi .9
clc
rts
* negative : check FFFFFF80<r<FFFFFFFF
.1 lda SRC.ACC+3
and SRC.ACC+2
and SRC.ACC+1
inc
bne .9
lda SRC.ACC
bpl .9
clc
rts
.9 sec
rts
*---------------------------------------
SRC.ComputeRel16
jsr SRC.ComputeRel
bcc .1
* positive : check 0<r<00007FFF
lda SRC.ACC+3
ora SRC.ACC+2
bne .9
lda SRC.ACC+1
bmi .9
clc
rts
* negative : check FFFF8000<r<FFFFFFFF
.1 lda SRC.ACC+3
and SRC.ACC+2
inc
bne .9
lda SRC.ACC+1
bpl .9
clc
rts
.9 sec
rts
*---------------------------------------
SRC.ComputeRel phy
ldy #ASM.PC
clc
lda SRC.ACC
sbc (pData),y
sta SRC.ACC
iny
lda SRC.ACC+1
sbc (pData),y
sta SRC.ACC+1
iny
lda SRC.ACC+2
sbc (pData),y
sta SRC.ACC+2
iny
lda SRC.ACC+3
sbc (pData),y
sta SRC.ACC+3
ply
rts
*---------------------------------------
SRC.GetDecimal jsr SRC.GetChar
beq .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit10
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
jsr SRC.IsDigit10
bcs .9
and #$0F
pha
jsr SRC.ACC10
pla
bcs .9
adc SRC.ACC
sta SRC.ACC
bcc .1
inc SRC.ACC+1
bne .1
inc SRC.ACC+2
bne .1
inc SRC.ACC+3
bne .1
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.8 clc
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetHex jsr SRC.GetNextChar skip '$'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit16
bcs .99
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
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
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetOctal jsr SRC.GetNextChar skip '&'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit8
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
jsr SRC.IsDigit8
bcs .9
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
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetBinary jsr SRC.GetNextChar skip '%'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
cmp #'1'
beq .10
cmp #'0'
bne .99
.10 and #$01
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
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
.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetKeyword >STYA ZPPtr1 KeyWord table
ldx #0 Keyword.ID
.1 phx
lda (ZPPtr1)
beq .9 End Of table
tax KW len
ldy #0
.3 lda (ZPLinePtr),y
beq .6
jsr SRC.IsKeywordLetterUC
bcs .6
iny
cmp (ZPPtr1),y
bne .6
dex
bne .3
lda (ZPLinePtr),y All chars match...
beq .4 End of Line ?
jsr SRC.IsKeywordLetterUC
bcc .6 Additional letters...
.4 lda ZPLinePtr
clc
adc (ZPPtr1)
sta ZPLinePtr
bcc .5
inc ZPLinePtr+1
.5 plx Keyword.ID
clc
rts
.6 lda (ZPPtr1)
sec Add keyword Len+1
adc ZPPtr1
sta ZPPtr1
bcc .7
inc ZPPtr1+1
.7 plx Keyword.ID
inx
inx
bra .1
.9 plx
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 SRC.IsEXPReserved.8
dex
bne .1
sec
rts
SRC.IsEXPReserved.8
clc
rts
*---------------------------------------
SRC.IsKeywordLetterUC
cmp #'.'
beq SRC.IsEXPReserved.8
cmp #'_'
beq SRC.IsEXPReserved.8
cmp #'A'
bcc .9
cmp #'Z'+1
bcc .99
cmp #'a'
bcc .9
cmp #'z'+1
eor #$20
rts CC if lowercase
.9 sec
.99 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
cmp #'a'
bcc .9
cmp #'f'+1
bcs .9
eor #$20
.1
* clc
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.GetNextCharNB
jsr SRC.GetNextChar
bcs .9
cmp #' '
beq SRC.GetNextCharNB
clc
.9 rts
*---------------------------------------
SRC.GetNextCharUC
jsr SRC.GetNextChar
bcs .9
cmp #'a'
bcc .8
cmp #'z'+1
bcs .8
eor #$20 to Uppercase
.8 clc
.9 rts
*---------------------------------------
SRC.GetNextChar lda (ZPLinePtr)
beq SRC.GetChar.ERR
cmp #$0D
beq SRC.GetChar.ERR
inc ZPLinePtr
bne SRC.GetChar
inc ZPLinePtr+1
SRC.GetChar lda (ZPLinePtr)
beq SRC.GetChar.ERR
cmp #$0D
beq SRC.GetChar.ERR
clc
rts
SRC.GetChar.ERR sec
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.BUILD/BIN/DEV/ASM.S.SRC
LOAD /A2OSX.BUILD/BIN/DEV/ASM.S
ASM
Reference in New Issue View Git Blame Copy Permalink