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A2osX/BIN/FORTH.S.txt
Rémy GIBERT f8d5dc8deb Kernel 0.94
2020-11-23 23:05:27 +01:00

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NEW
AUTO 3,1
.LIST OFF
.OP 65C02
.OR $2000
.TF bin/forth
*--------------------------------------
.INB inc/macros.i
.INB inc/a2osx.i
.INB inc/mli.i
.INB inc/mli.e.i
*--------------------------------------
CODE.SIZE .EQ 2048
DATA.SIZE .EQ 2048
INPUT.SIZE .EQ 256
OUTPUT.SIZE .EQ 256
CL.SIZE .EQ 256
*--------------------------------------
SYM.T.CONST .EQ 0
SYM.T.VAR .EQ 64
SYM.T.CODE .EQ 128
*--------------------------------------
.DUMMY
.OR ZPBIN
ZS.START
ZPCodePtr .BS 2
ZPDataPtr .BS 2
ZPInputPtr .BS 2
ZPOutputPtr .BS 2
ZPKeyID .BS 2
ZPType .BS 1
.BS 1
ZPAddrPtr .BS 2
ZPPtr1 .BS 2
ZPPtr2 .BS 2
ZPPtr3 .BS 2
ZPCLBuf .BS 2
ZPCLBufPtr .BS 2
CL.Ptr .BS 1
CL.Len .BS 1
CL.bReady .BS 1
CL.bEscMode .BS 1
CL.MaxCnt .BS 1
ArgIndex .EQ *
bCompile .BS 1
RP .BS 1
ZS.END .ED
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp (.1,x)
.DA #$61 6502,Level 1 (65c02)
.DA #1 BIN Layout Version 1
.DA #0 S.PS.F.EVENT
.DA #0
.DA CS.END-CS.START Code Size (without Constants)
.DA DS.END-DS.START Data SegmentSize
.DA #256 Stack Size
.DA #ZS.END-ZS.START Zero Page Size
.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1 .DA CS.INIT
.DA CS.RUN
.DA CS.DOEVENT
.DA CS.QUIT
L.MSG.GREETINGS .DA MSG.GREETINGS
L.MSG.USAGE .DA MSG.USAGE
L.MSG.ECHOCRLF .DA MSG.ECHOCRLF
L.MSG.DEBUG .DA MSG.DEBUG
L.MSG.ERR .DA MSG.ERR
L.MSG.PROMPT .DA MSG.PROMPT
L.MSG.PROMPTCRLF .DA MSG.PROMPTCRLF
L.FMT.Byte .DA FMT.Byte
L.FMT.int16 .DA FMT.int16
J.ESC .DA CL.BS left arrow
.DA CL.DN
.DA CL.UP
* .DA HIS.GetNext
* .DA HIS.GetPrev
.DA CL.NAK right arrow
L.KEYWORDS .DA KEYWORDS
J.KEYWORDS .DA KW.DUP
.DA KW.DROP
.DA KW.SWAP
.DA KW.OVER
.DA KW.ROT
.DA KW.mDUP
.DA KW.gR
.DA KW.Rg
.DA KW.R
.DA KW.Add
.DA KW.DAdd
.DA KW.Sub
.DA KW.Mul
.DA KW.Div
.DA KW.Mod
.DA KW.DivMod
.DA KW.MulDivMod
.DA KW.MulDiv
.DA KW.MAX
.DA KW.MIN
.DA KW.ABS
.DA KW.DABS
.DA KW.MINUS
.DA KW.DMINUS
.DA KW.AND
.DA KW.OR
.DA KW.XOR
.DA KW.LWR
.DA KW.GTR
.DA KW.EQ
.DA KW.NEGATIVE
.DA KW.ZERO
.DA KW..
.DA KW..R
.DA KW.D.
.DA KW.D.R
.DA KW.CR
.DA KW.SPACE
.DA KW.SPACES
.DA KW.PRINT
.DA KW.DUMP
.DA KW.TYPE
.DA KW.COUNT
.DA KW.TERMINAL
.DA KW.KEY
.DA KW.EMIT
.DA KW.EXPECT
.DA KW.WORD
.DA KW.NUMBER
.DA KW.STARTSTR
.DA KW.STRADD
.DA KW.STRDBL
.DA KW.SIGN
.DA KW.ENDSTR
.DA KW.HOLD
.DA KW.DECIMAL
.DA KW.HEX
.DA KW.OCTAL
.DA KW.FETCHW
.DA KW.STOREW
.DA KW.FETCHB
.DA KW.STOREB
.DA KW.FETCHPRINTW
.DA KW.ADDTOW
.DA KW.CMOVE
.DA KW.FILL
.DA KW.ERASE
.DA KW.BLANKS
.DA KW.HERE
.DA KW.PAD
.DA KW.ALLOT
.DA KW.nCOMPILE
.DA KW.QUOTE
.DA KW.FORGET
.DA KW.DEFINITIONS
.DA KW.VOCABULARY
.DA KW.FORTH
.DA KW.EDITOR
.DA KW.ASSEMBLER
.DA KW.VLIST
.DA KW.BCOLON
.DA KW.ECOLON
.DA KW.VARIABLE
.DA KW.CONSTANT
.DA KW.ACODE
.DA KW.FCODE
.DA KW.DO
.DA KW.LOOP
.DA PW.pLOOP
.DA KW.I
.DA KW.LEAVE
.DA KW.IF
.DA KW.ELSE
.DA KW.ENDIF
.DA KW.BEGIN
.DA KW.UNTIL
.DA KW.REPEAT
.DA KW.WHILE
.DA KW.COMMENT
.DA 0
*--------------------------------------
CS.INIT clc
CS.INIT.RTS rts
*--------------------------------------
CS.RUN >PUSHW L.MSG.GREETINGS
>PUSHW A2osX.KVER
>PUSHBI 2
>SYSCALL PrintF
bcs CS.INIT.RTS
jsr CS.RUN.ARGS
bcs CS.INIT.RTS
>LDYAI CODE.SIZE
>SYSCALL GetMem
bcs CS.INIT.RTS
>STYA ZPCodePtr
>STYA.G CodeBuf
txa
>STA.G hCodeBuf
>LDYAI DATA.SIZE
>SYSCALL GetMem
.9 bcs CS.INIT.RTS
>STYA ZPDataPtr
>STYA.G DataBuf
txa
>STA.G hDataBuf
>LDYAI INPUT.SIZE
>SYSCALL GetMem
bcs .9
>STYA.G InputBuf
txa
>STA.G hInputBuf
>LDYAI OUTPUT.SIZE
>SYSCALL GetMem
bcs .9
>STYA.G OutputBuf
txa
>STA.G hOutputBuf
>LDYAI CL.SIZE
>SYSCALL GetMem
bcs .9
>STYA ZPCLBuf
txa
>STA.G hCLBuf
>SYSCALL SListNew
bcs .9
>STA.G hSList
stz bCompile
lda #127
sta RP
CS.RUN.LOOP >SLEEP
>LDA.G bDebug
bpl .2
jsr PrintDebugMsg
.2 >LDA.G bTrace
bpl .3
>LDYA ZPCLBuf
jsr PrintTraceMsg
.3 jsr CS.FORTH.Run
bcc CS.RUN.LOOP
cmp #MLI.E.EOF
beq .8
cmp #3
beq .99
pha
>LDA.G bExitOnEOF
bmi .9
pla
>PUSHA
>PUSHW ZPCLBuf
>SYSCALL GetErrorMessage
>LDYA ZPCLBuf
>SYSCALL PutS
bra CS.RUN.LOOP
* jsr PrintErrMsg
.9 pla
.99 sec
rts
.8 lda #0 Exit Code = Success
sec
rts
*--------------------------------------
CS.RUN.ARGS inc ArgIndex
lda ArgIndex
>SYSCALL ArgV
bcs .8
>STYA ZPPtr1
lda (ZPPtr1)
cmp #'-'
bne .4
ldy #1
lda (ZPPtr1),y
ldx #OptionVars-OptionList-1
.1 cmp OptionList,x
beq .2
dex
bpl .1
bra .90
.2 ldy OptionVars,x
lda #$ff
sta (pData),y
bra CS.RUN.ARGS
.4 >LDA.G hFile
bne .90
>LDYA ZPPtr1
jsr CS.RUN.FOpen
bcs .9
>STA.G hFile
bra CS.RUN.ARGS
.8 clc
.9 rts
.90 >PUSHW L.MSG.USAGE
>PUSHBI 0
>SYSCALL PrintF
lda #E.SYN
sec QUIT Process
rts
*--------------------------------------
CS.FORTH.Run jsr CL.Reset
>LDA.G hFile
bne CS.FORTH.Run.File
lda #80
sta CL.MaxCnt
jsr PrintPrompt
bcs .9
.1 >SYSCALL GetChar
bcs .9 I/O error
.2 cmp #3 Ctrl-C
beq .9 CS
jsr CL.CHARIN
bit CL.bReady Something to execute ?
bpl .1
>PUSHW L.MSG.PROMPTCRLF
>PUSHBI 0
>SYSCALL PrintF
jmp CS.RUN.EXEC
.9 rts
*--------------------------------------
CS.FORTH.Run.File
>PUSHWI 256
>PUSHW ZPCLBuf
>LDA.G hFile
>SYSCALL fgets
bcs .9
lda (ZPCLBuf)
beq .8
cmp #'#'
bne .1
ldy #1
lda (ZPCLBuf),y
beq .1
cmp #'!'
beq .8
.1 jmp CS.RUN.EXEC
.8 clc
.9 rts
*--------------------------------------
CS.RUN.EXEC lda (ZPCLBufPtr)
beq .8
.1 jsr KW.Lookup
bcs .2
tya
jsr NextKW
jsr .7
bcc CS.RUN.EXEC
rts
.2 jsr CS.RUN.GetSymbol
bcs .5
bit ZPType
bmi .4
bvc .3
>PUSHW ZPAddrPtr
rts
.3 ldy #1
>PUSHB (ZPAddrPtr),y
>PUSHB (ZPAddrPtr)
rts
.4 bit bCompile
bmi .40
jsr .80
bcc CS.RUN.EXEC
rts
.40 >LDYA ZPAddrPtr
jsr EmitJsrYA
bra CS.RUN.EXEC
.5 jsr CS.RUN.GetNum
bcs .9
.6 jsr NextChar Skip SPACE if any
bne .1
.8 clc
.9 rts
.7 txa
asl
tax
cpx #$A2 ; ECOLON always EXECUTE
beq .71
bit bCompile
bmi .72
.70 bcs .99 cannot exec compil only
.71 jmp (J.KEYWORDS,x)
.72 jmp CP.RUN
.80 jmp (ZPAddrPtr)
.99 lda #E.SYN
sec
rts
*--------------------------------------
CS.RUN.FOpen >PUSHYA
>PUSHBI O.RDONLY
>PUSHBI S.FI.T.TXT
>PUSHWZ Aux type
>SYSCALL FOpen
bcs .9
>STA.G hFile
.9 rts
*--------------------------------------
CS.RUN.GetSymbol
>PUSHB.G hSList
>PUSHW ZPCLBufPtr
>SYSCALL SListLookup
bcs .9
>STYA ZPKeyID
txa
jsr NextKW
>PUSHB.G hSList
>PUSHW ZPKeyID
>PUSHWI ZPType
>PUSHWI 4 4 bytes
>PUSHWZ From Start
>SYSCALL SListGetData
bcs .9
.9 rts
*--------------------------------------
CS.RUN.GetNum >PUSHW ZPCLBufPtr
>PUSHWI ZPCLBufPtr
>PUSHBI 10
>SYSCALL StrToL
bcs .9
ldy #2
lda (pStack)
sta (pStack),y
inc pStack
lda (pStack)
sta (pStack),y
inc pStack
bit bCompile
bmi .1
* clc
rts
.1 >PULLYA
jsr EmitPushYA
clc
.9 rts
*--------------------------------------
CS.DOEVENT sec
rts
*--------------------------------------
CS.QUIT >LDA.G hSList
beq .1
>PUSHA
>SYSCALL SListFree
.1 >LDA.G hFile
beq .2
>SYSCALL FClose
.2 ldy #hCodeBuf
jsr .7
ldy #hDataBuf
jsr .7
ldy #hInputBuf
jsr .7
ldy #hOutputBuf
jsr .7
ldy #hCLBuf
.7 lda (pData),y
beq .8
>SYSCALL FreeMem
.8 clc
rts
*--------------------------------------
PrintPrompt >PUSHW L.MSG.PROMPT
>PUSHBI 0
>SYSCALL PrintF
rts
*--------------------------------------
PrintErrMsg >LDYA.G ZPCLBuf
>STYA ZPPtr1
clc
rts
*--------------------------------------
PrintDebugMsg
clc
rts
*--------------------------------------
PrintTraceMsg >STYA ZPPtr3
PrintTraceMsg.3 >PUSHBI '>'
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL FPutC
ldy #$ff
.1 iny
lda (ZPPtr3),y
beq .8
cmp #C.CR
beq .8
phy
>PUSHA
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL FPutC
ply
bra .1
.8 ldy #S.PS.hStdErr
lda (pPS),y
>PUSHA
>PUSHW L.MSG.ECHOCRLF
>PUSHBI 0
>SYSCALL FPrintF
rts
*--------------------------------------
CheckLFAfterCR ldy #S.PS.hStdIn Check for any extra LF
lda (pPS),y
>SYSCALL FEOF
bcs .9
tay
bne .9
>SYSCALL GetChar
.9 rts
*--------------------------------------
IncPtr1 inc ZPPtr1
bne IncPtr1.8
inc ZPPtr1+1
IncPtr1.8 rts
*--------------------------------------
NextKW clc
adc ZPCLBufPtr
sta ZPCLBufPtr
bcc NextCharNB
inc ZPCLBufPtr+1
*--------------------------------------
NextCharNB lda (ZPCLBufPtr)
beq .8
jsr IsSpaceOrCR
bcs .8
inc ZPCLBufPtr
bne NextCharNB
inc ZPCLBufPtr+1
bra NextCharNB
.8 rts
*--------------------------------------
NextChar lda (ZPCLBufPtr)
beq .8
inc ZPCLBufPtr
bne .8
inc ZPCLBufPtr+1
.8 rts
*--------------------------------------
ToUpperCase cmp #'a'
bcc .8
cmp #'z'+1
bcs .8
eor #$20
.8 clc exit CC to allow Jmp to
rts
*--------------------------------------
IsSpaceOrCR cmp #C.SPACE
beq IsEndKW.8
cmp #C.CR
beq IsEndKW.8
sec
rts
IsEndKW.8 clc
rts
*--------------------------------------
CheckStackPop4 lda pStack
sec
sbc #4
bcc .9
clc
rts
.9 lda #E.STACKERROR
sec
rts
*--------------------------------------
EmitPullA lda #$B2 lda (zp)
jsr EmitByte
lda #pStack
jsr EmitByte
lda #$E6 inc zp
lda #pStack
bra EmitByte
*--------------------------------------
EmitPushYA pha
tya
jsr EmitPushA
pla
EmitPushA pha
lda #$A9 LDA imm
jsr EmitByte
pla
jsr EmitByte
lda #$C6 DEC zp
jsr EmitByte
lda #pStack
jsr EmitByte
lda #$92 STA (zp)
jsr EmitByte
lda #pStack
bra EmitByte
*--------------------------------------
EmitJsrYA pha
lda #$20
jsr EmitByte
tya
jsr EmitByte
pla
*--------------------------------------
EmitByte sta (ZPCodePtr)
inc ZPCodePtr
bne .8
inc ZPCodePtr+1
.8 rts
*--------------------------------------
.INB usr/src/bin/forth.s.cl
.INB usr/src/bin/forth.s.cp
.INB usr/src/bin/forth.s.kw
*--------------------------------------
CS.END
*--------------------------------------
MSG.GREETINGS .AZ "\r\nA2osX-FORTH %d.%d (figForth)\r\n\r\n"
MSG.USAGE .AS "Usage : FORTH <option> file\r\n"
.AS " -D : Debug Mode\r\n"
.AS " -T : Trace On"
MSG.ECHOCRLF .AZ "\r\n"
MSG.DEBUG .AZ "pStack=%H"
MSG.ERR .AZ "^\r\nLine #%D:"
MSG.PROMPT .AZ "\e[?7hOK\r\n> " Enable Line Wrap
MSG.PROMPTCRLF .AZ "\e[?7l\r\n" Disable Line Wrap
FMT.Byte .AZ "%d "
FMT.int16 .AZ "%I "
*--------------------------------------
OptionList .AS "DdTt"
OptionVars .DA #bDebug,#bDebug,#bTrace,#bTrace
*--------------------------------------
EscChars .AS 'DBAC'
EscChars.Cnt .EQ *-EscChars
EscChars.Remap .DA #C.BS,#C.VT,#C.LF,#C.FS
*--------------------------------------
KEYWORDS .AT "DUP" ( n - n n ) Duplicate top of stack.
.AT "DROP" ( n - ) Discard top of stack.
.AT "SWAP" ( n1 n2 - n2 n1 ) Reverse top two stack items.
.AT "OVER" ( n1 n2 - n1 n2 n1 ) Copy second item to top.
.AT "ROT" ( n1 n2 n3 - n2 n3 n1 ) Rotate third item to top.
.AT "-DUP" ( n - n ? ) Duplicate only if non-zero.
.AT ">R" ( n - ) Move top item to return stack.
.AT "R>" ( - n ) Retrieve item from return stack.
.AT "R" ( - n ) Copy top of return stack onto stack.
.AT "+" ( n1 n2 - sum ) Add.
.AT "D+" ( d1 d2 - sum ) Add double-precision numbers.
.AT "-" ( n1 n2 - diff ) Subtract (n1-n2).
.AT "*" ( n1 n2 - prod ) Multiply.
.AT "/" ( n1 n2 - quot ) Divide (n1/n2).
.AT "MOD" ( n1 n2 - rem ) Modulo (remainder from division).
.AT "/MOD" ( n1 n2 - rem quot ) Divide, giving remainder and quotient.
.AT "*/MOD" ( n1 n2 - rem quot ) Multiply, then divide (n1*n2/n3), with double-precision intermediate.
.AT "*/" ( n1 n2 - quot ) Like */MOD, but give quotient only.
.AT "MAX" ( n1 n2 - max ) Maximum.
.AT "MIN" ( n1 n2 - min ) Minimum.
.AT "ABS" ( n - absolute ) Absolute value.
.AT "DABS" ( d - absolute ) Absolute value of double-precision number.
.AT "MINUS" ( n - -n ) Change sign.
.AT "DMINUS" ( d - -d ) Change sign of double-precision number.
.AT "AND" ( n1 n2 - and ) Logical bitwise AND.
.AT "OR" ( n1 n2 - or ) Logical bitwise OR.
.AT "XOR" ( n1 n2 - xor ) Logical bitwise exclusive OR.
.AT "<" ( n1 n2 - f ) True if n1 less than n2.
.AT ">" ( n1 n2 - f ) True if n1 greater than n2.
.AT "=" ( n1 n2 - f ) True if n1 equal to n2.
.AT "0<" ( n - f ) True if top number negative.
.AT "0=" ( n - f ) True if top number zero.
*--------------------------------------
.AT "." ( n - ) Print number.
.AT ".R" ( n u - ) Print number, right-justified in u column.
.AT "D." ( d - ) Print double-precision number.
.AT "D.R" ( d u - ) Print double-precision number in u column.
.AT "CR" ( - ) Do a carriage-return.
.AT "SPACE" ( - ) Type one space.
.AT "SPACES" ( u - ) Type u spaces.
.AT '."' ( - ) Print message (terminated by ").
.AT "DUMP" ( addr u - ) Dump u numbers starting at address.
.AT "TYPE" ( addr u - ) Type u characters starting at address.
.AT "COUNT" ( addr - addr+1 u ) Change length byte string to TYPE form.
.AT "?TERMINAL" ( - f ) True if terminal break request present.
.AT "KEY" ( - c ) Read key, put ASCII value on stack.
.AT "EMIT" ( c - ) Type ASCII character from stack.
.AT "EXPECT" ( addr u - ) Read u characters (or until carriage-return) from input device to address.
.AT "WORD" ( c - ) Read one word from input stream, delimited by c.
.AT "NUMBER" ( addr - d ) Convert string at address to double number.
.AT "<#" ( - ) Start output string.
.AT "#" ( d1 - d2 ) Convert one digit of double number and add character to output string.
.AT "#S" ( d - 0 0 ) Convert all significant digits of double number to output string.
.AT "SIGN" ( n d - d ) Insert sign of n to output string.
.AT "#>" ( d - addr u ) Terminate output string for TYPE.
.AT "HOLD" ( c - ) Insert ASCII character into output string.
.AT "DECIMAL" ( - ) Set decimal base.
.AT "HEX" ( - ) Set hexadecimal base.
.AT "OCTAL" ( - ) Set octal base.
*--------------------------------------
.AT "@" ( addr - n ) Replace word address by contents.
.AT "!" ( n addr - ) Store second word at address on top.
.AT "C@" ( addr - b ) Fetch one byte only.
.AT "C!" ( b addr - ) Store one byte only.
.AT "?" ( addr - ) Print contents of address.
.AT "+!" ( n addr - ) Add second number to contents of address.
.AT "CMOVE" ( from to u - ) Move u bytes in memory.
.AT "FILL" ( addr u b - ) Fill u bytes in memory with b beginning at address.
.AT "ERASE" ( addr u - ) Fill u bytes in memory with zeros.
.AT "BLANKS" ( addr u - ) Fill u bytes in memory with blanks.
.AT "HERE" ( - addr ) Return address above dictionary.
.AT "PAD" ( - addr ) Return address of scratch area.
.AT "ALLOT" ( u - ) Leave a gap of n bytes in the dictionary.
.AT "," ( n - ) Compile number n into the dictionary.
.AT "'" ( - addr ) Find address of next string in dictionary.
.AT "FORGET" ( - ) Delete all definitions above and including the following definition.
.AT "DEFINITIONS" ( - ) Set current vocabulary to context vocabulary.
.AT "VOCABULARY" ( - ) Create new vocabulary.
.AT "FORTH" ( - ) Set context vocabulary to Forth vocabulary.
.AT "EDITOR" ( - ) Set context vocabulary to Editor vocabulary.
.AT "ASSEMBLER" ( - ) Set context vocabulary to Assembler.
.AT "VLIST" ( - ) Print names in context vocabulary.
*--------------------------------------
.AT ":" ( - ) Begin a colon definition.
.AT ";" ( - ) End of a colon definition.
.AT "VARIABLE" ( n - ) Create a variable with initial value n.
.AT "CONSTANT" ( n - ) Create a constant with value n.
.AT "CODE" ( - ) Create assembly-language definition.
.AT ";CODE" ( - ) Create a new defining word, with runtime code routine in high-level Forth.
.AT "DO" ( end+1 start - ) Set up loop, given index range.
.AT "LOOP" ( - ) Increment index, terminate loop if equal to limit.
.AT "+LOOP" ( n - ) Increment index by n. Terminate loop if outside limit.
.AT "I" ( - index ) Place loop index on stack.
.AT "LEAVE" ( - ) Terminate loop at next LOOP or +LOOP.
.AT "IF" ( f - ) If top of stack is true, execute true clause.
.AT "ELSE" ( - ) Beginning of the false clause.
.AT "ENDIF" ( - ) End of the IF-ELSE structure.
.AT "BEGIN" ( - ) Start an indefinite loop.
.AT "UNTIL" ( f - ) Loop back to BEGIN until f is true.
.AT "REPEAT" ( - ) Loop back to BEGIN unconditionally.
.AT "WHILE" ( f - ) Exit loop immediately if f is false.
*--------------------------------------
.AT "(" ( - ) Begin comment, terminated by ).
*--------------------------------------
.DA #0
*--------------------------------------
.DUMMY
.OR 0
DS.START .BS 128 RETURN STACK
bDebug .BS 1
bTrace .BS 1
bExitOnEOF .BS 1
hCodeBuf .BS 1
CodeBuf .BS 2
hDataBuf .BS 1
DataBuf .BS 2
hInputBuf .BS 1
InputBuf .BS 2
hOutputBuf .BS 1
OutputBuf .BS 2
hCLBuf .BS 1
hFile .BS 1
hSList .BS 1
DS.END .ED
*--------------------------------------
MAN
SAVE usr/src/bin/forth.s
ASM
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