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figforth.asm
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.TITLE Z80 fig-FORTH 1.3
;
;
; Modified frm FIG document keyed by Dennis L. Wilson 800907
; Converted frm "8080 FIG-FORTH VERSION A0 15SEP79"
;
; fig-FORTH release 1.1 for the 8080 processor.
;
; ALL PUBLICATIONS OF THE FORTH INTEREST GROUP
; ARE PUBLIC DOMAIN. THEY MAY BE FURTHER
; DISTRIBUTED BY THE INCLUSION OF THIS CREDIT NOTICE:
;
; This publication has been made available by the
; Forth Interest Group
; P.O.Box 1105
; San Carlos, CA 94070
; U.S.A.
;
; Implementation on 8080 by:
; John Cassady
; 339 15th Street
; Oakland, CA 94612
; U.S.A
; on 790528
; Modified by:
; Kim Harris
; Acknowledgements:
; George Flammer
; Robt. D. Villwock
; ----------------------------------------------------------------------
; Z80 Version for Cromemco CDOS & Digital Research CP/M by:
; Dennis Lee Wilson c/o
; Aristotelian Logicians
; 2631 East Pinchot Avenue
; Phoenix, AZ 85016
; U.S.A.
; ----------------------------------------------------------------------
; The 2 byte Z80 code for Jump Relative (JR) has been substituted for
; the 3 byte Jump (JP) wherever practical. The port I/O words P@ & P!
; have been made ROMable by use of Z80 instructions.
; ----------------------------------------------------------------------
; Further modifications (marked ;/) by:
; Edmund Ramm
; Anderheitsallee 24
; 2000 Hamburg 71
; Fed. Rep. of Germany 840418
; ----------------------------------------------------------------------
; Disc I/O has been modified a la Albert van der Horst (HCCH) to employ
; CP/M 2.x's random access feature.
; ----------------------------------------------------------------------
; Adaptive version by EHR
; ----------------------------------------------------------------------
; Upgraded to v1.3 by Dimitri Theulings - 11/2020 - changes marked 1.3
; Changes are based on '8080 FIG-FORTH 1.3 VERSION 0 18JUL81'
; ----------------------------------------------------------------------
;
; Release & Version numbers
;
FIGREL .EQU 1 ;FIG RELEASE #
FIGREV .EQU 3 ;FIG REVISION #
USRVER .EQU 62H ;USER VERSION # DT
;
;Console & printer drivers are in external source named
;CONPRTIO.FTH & disc drivers in DISCIO.FTH. It has 4 screen
;buffers & end of memory is set to FBASE from locn. 0007H.
.EJECT
; ASCII characters used
;
ABL .EQU 20H ;BLANK
ACR .EQU 0DH ;CR
ADOT .EQU 2EH ;.
BELL .EQU 07H ;^G
BSIN .EQU 08H ;backspace chr = ^H
BSOUT .EQU 08H
DLE .EQU 10H ;^P
LF .EQU 0AH ;^J
FF .EQU 0CH ;^L
;
; Memory allocation
;
BDOSS .EQU 0005H ;/ system entry
NSCR .EQU 4 ; # of 1024 byte screens
KBBUF .EQU 128 ; bytes/disc buffer
US .EQU 40H ; user variables space
RTS .EQU 400H ; Return Stack & term buff space
CO .EQU KBBUF+4 ; Disc buff + 2 header + 2 tail
NBUF .EQU NSCR*400H/KBBUF ; # of buffers
BUFSIZ .EQU CO*NBUF ;/ total disc buffer size
.EJECT
;ABS
;
.ORG 0100H
ORIG: NOP
JP CLD ;VECTOR TO COLD START
NOP
JP WRM ;VECTOR TO WARM START
.BYTE FIGREL ;FIG RELEASE #
.BYTE FIGREV ;FIG REVISION #
.BYTE USRVER ;USER VERSION #
.BYTE 0EH ;IMPLEMENTATION ATTRIBUTES
;
;
;
; 0EH = 0000:1110
; ---------
; B +ORIGIN ...W:IEBA
;
; W: 0=above sufficient
; 1=other differences exist
; I: Interpreter is 0=pre-
; 1=post incrementing
; E: Addr must be even: 0 yes
; 1 no
; B: High byte @ 0=low addr.
; 1=high addr.
; A: CPU Addr. 0=BYTE
; 1=WORD
;
;
;
.WORD TASK-7 ; TOPMOST WORD IN FORTH VOCABULARY
.WORD BSIN ; BACKSPACE CHR
UPINIT: .WORD 0 ;/ INIT (UP)
;
; * FOLLOWING USED BY COLD; MUST BE IN SAME ORDER AS USER VARIABLES *
;
S0INIT: .WORD 0 ;/ INIT (S0)
R0INIT: .WORD 0 ;/ INIT (R0)
TIBINI: .WORD 0 ;/ INIT (TIB)
.WORD 1FH ; INIT (WIDTH)
.WORD 0 ; INIT (WARNING)
.WORD INITDP ; INIT (FENCE)
.WORD INITDP ; INIT (DP)
.WORD FORTH+8 ; INIT (VOC-LINK)
;
; * END DATA USED BY COLD *
;
.WORD 0H,0B250H ;Z80 CPU NAME (HW,LW)
;(32 BIT BASE 36 INTEGER)
#IFDEF ROMWBW
.WORD 0 ;VIDEO DEVICE ID
.WORD 0,0,0 ;RTC DATE/TIME
#ENDIF
.EJECT
; REGISTERS
;
; FORTH Z80 FORTH PRESERVATION RULES
; ----- --- -----------------------
; IP BC should be preserved
; accross FORTH words.
; W DE sometimes output from
; NEXT, may be altered
; b4 JP'ing to NEXT,
; input only when
; "DPUSH" called.
; SP SP should be used only as
; Data Stack accross
; FORTH words, may be
; used within FORTH
; words if restored
; b4 "NEXT"
; HL Never output frm NEXT
; input only when
; "HPUSH" called
;
;
UP: .WORD 0 ;/ USER AREA PTR
RPP: .WORD 0 ;/ RETURN STACK PTR
BUF1: .WORD 0 ;/ address of 1st disc buffer
;
;
; COMMENT CONVENTIONS:
;
; = MEANS "IS EQUAL TO"
; <-- MEANS ASSIGNMENT
; NAME = ADDR OF NAME
; (NAME) = CONTENTS @ NAME
; ((NAME))= INDIRECT CONTENTS
; CFA = CODE FIELD ADDR
; LFA = LINK FIELD ADDR
; NFA = NAME FIELD ADDR
; PFA = PARAMETER FIELD ADDR
; S1 = ADDR OF 1st WORD OF PARAMETER STACK
; S2 = -"- OF 2nd -"- OF -"- -"-
; R1 = -"- OF 1st -"- OF RETURN STACK
; R2 = -"- OF 2nd -"- OF -"- -"-
; ( above Stack posn. valid b4 & after execution of any word, not during)
;
; LSB = LEAST SIGNIFICANT BIT
; MSB = MOST SIGNIFICANT BIT
; LB = LOW BYTE
; HB = HIGH BYTE
; LW = LOW WORD
; HW = HIGH WORD
; (May be used as suffix to above names)
.EJECT
; FORTH ADDRESS INTERPRETER
; POST INCREMENTING VERSION
;
DPUSH: PUSH DE
HPUSH: PUSH HL ; IY points here
NEXT: LD A,(BC) ;(W)<--((IP)) IX points here
LD L,A
INC BC ;INC IP
LD A,(BC)
LD H,A ;(HL)<--CFA
INC BC ;INC IP
NEXT1: LD E,(HL) ;(PC)<--((W))
INC HL
LD D,(HL)
EX DE,HL
JP (HL) ;NOTE: (DE)=CFA+1
;
;
#DEFINE JNEXT JP (IX)
;
;
#DEFINE JHPUSH JP (IY)
;
;
.EJECT
; FORTH DICTIONARY
; DICTIONARY FORMAT:
;
; BYTE
; ADDRESS NAME CONTENTS
; ------- ---- --------
; (MSB=1
; (P=PRECEDENCE BIT
; (S=SMUDGE BIT
; NFA NAME FIELD 1PS<LEN> <NAME LENGTH
; 0<1CHAR> MSB=0, NAME'S 1st CHAR
; 0<2CHAR>
; ...
; 1<LCHAR> MSB=1, NAME'S LAST CHAR
; LFA LINK FIELD <LINKLB> =PREVIOUS WORD'S NFA
; <LINKHB>
;LABEL: CFA CODE FIELD <CODELB> =ADDR CPU CODE
; <CODEHB>
; PFA PARAMETER <1PARAM> 1st PARAMETER BYTE
; FIELD <2PARAM>
; ...
;
;
;
DP0: .BYTE 83H ;LIT
.TEXT "LI"
.BYTE 'T'+$80
.WORD 0 ;(LFA)=0 MARKS END OF DICTIONARY
LIT: .WORD $+2 ;(S1)<--((IP))
LD A,(BC) ;(HL)<--((IP))=LITERAL
INC BC ;(IP)<--(IP)+2
LD L,A ;LB
LD A,(BC) ;HB
INC BC
LD H,A
JHPUSH ;(S1)<--(HL)
;
.BYTE 87H ;EXECUTE
.TEXT "EXECUT"
.BYTE 'E'+$80
.WORD LIT-6
EXEC: .WORD $+2
POP HL
JP NEXT1
;
.BYTE 86H ;BRANCH
.TEXT "BRANC"
.BYTE 'H'+$80
.WORD EXEC-0AH
BRAN: .WORD $+2 ;(IP)<--(IP)+((IP))
BRAN1: LD H,B ;(HL)<--(IP)
LD L,C
LD E,(HL) ;(DE)<--((IP))=BRANCH OFFSET
INC HL
LD D,(HL)
DEC HL
ADD HL,DE ;(HL)<--(HL)+((IP))
LD C,L ;(IP)<--(HL)
LD B,H
JNEXT
;
.BYTE 87H ;0BRANCH
.TEXT "0BRANC"
.BYTE 'H'+$80
.WORD BRAN-9
ZBRAN: .WORD $+2
POP HL
LD A,L
OR H
JR Z,BRAN1 ;IF (S1)=0 THEN BRANCH
INC BC ;ELSE SKIP BRANCH OFFSET
INC BC
JNEXT
;
.BYTE 86H ;(LOOP)
.TEXT "(LOOP"
.BYTE ')'+$80
.WORD ZBRAN-0AH
XLOOP: .WORD $+2
LD HL,(RPP) ; ((HL))=INDEX=(R1)
inc (hl) ;/ index(lb) += 1
LD E,(HL) ;/
INC HL ;/ (hl)-->index(hb)
jr nz,xloop1 ;/ jump if ((hl)) < 256
inc (hl) ;/ else index(hb) += 1
xloop1: LD D,(HL) ;/ (DE)<-- new INDEX
INC HL ;/ ((HL))=LIMIT
LD A,E
SUB (HL)
LD A,D
INC HL
SBC A,(HL) ; INDEX<LIMIT?
JP M,BRAN1 ; YES, LOOP AGAIN
INC HL ; NO, DONE
LD (RPP),HL ; DISCARD R1 & R2
INC BC
INC BC ; SKIP BRANCH OFFSET
JNEXT
;
.BYTE 87H ;(+LOOP)
.TEXT "(+LOOP"
.BYTE ')'+$80
.WORD XLOOP-9
XPLOO: .WORD $+2
POP DE ;(DE)<--INCR
LD HL,(RPP) ;((HL))=INDEX
LD A,(HL) ;INDEX<--INDEX+INCR
ADD A,E
LD (HL),A
LD E,A
INC HL
LD A,(HL)
ADC A,D
LD (HL),A
INC HL ;((HL))=LIMIT
INC D
DEC D
LD D,A ;(DE)<--NEW INDEX
JP M,XLOO2 ;IF INCR>0
LD A,E
SUB (HL) ;THEN (A)<--INDEX - LIMIT
LD A,D
INC HL
SBC A,(HL)
JP XLOO3
XLOO2: LD A,(HL) ;ELSE (A)<--LIMIT - INDEX
SUB E
INC HL
LD A,(HL)
SBC A,D
; ;IF (A)<0
XLOO3: JP M,BRAN1 ;THEN LOOP AGN
INC HL ;ELSE DONE
LD (RPP),HL ;DISCARD R1 & R2
INC BC ;SKIP BRANCH OFFSET
INC BC
JNEXT
;
.BYTE 84H ; (DO)
.TEXT "(DO"
.BYTE ')'+$80
.WORD XPLOO-0AH
XDO: .WORD $+2
EXX ;/ SAVE IP
POP DE ; (DE)<--INITIAL INDEX
POP BC ;/ (BC)<--LIMIT
LD HL,(RPP) ; (HL)<--(RP)
DEC HL
LD (HL),B
DEC HL
LD (HL),C ;/ (R2)<--LIMIT
DEC HL
LD (HL),D
DEC HL
LD (HL),E ; (R1)<--INITIAL INDEX
LD (RPP),HL ; (RP)<--(RP)-4
EXX ;/ RESTORE IP
JNEXT
;
.BYTE 81H ;I
.BYTE 'I'+$80
.WORD XDO-7
IDO: .WORD $+2 ;(S1)<--(R1), (R1) UNCHANGED
LD HL,(RPP)
IDO1: LD E,(HL) ;(DE)<--(R1)
INC HL
LD D,(HL)
PUSH DE ;(S1)<--(DE)
JNEXT
;
.BYTE 82H ; I' 1.3
.BYTE 'I'
.BYTE $27+$80
.WORD IDO-4
IPRIM .DW $+2
LD HL,(RPP)
INC HL
INC HL ; ((HL)) = (R2)
JR IDO1
;
.BYTE 81H ; J 1.3
.BYTE 'J'+$80
.WORD IPRIM-5
J .WORD $+2
LD HL,(RPP)
INC HL
INC HL
INC HL
INC HL ; ((HL)) = (R3)
JR IDO1
;
.BYTE 85H ;DIGIT
.TEXT "DIGI"
.BYTE 'T'+$80
.WORD J-4
DIGIT: .WORD $+2
POP HL ;(L)<--(S1)LB = BASE VALUE
POP DE ;(E)<--(S2)LB = ASCII CHR TO BE CONVERTED
LD A,E ;ACCU<--CHR
SUB '0' ;>=0?
JR C,DIGI2 ;/ <0 IS INVALID
CP 0AH ;>9?
JR C,DIGI1 ;/ NO, TEST BASE VALUE
SUB 07H ;GAP BETWEEN "9" & "A", NW "A"=0AH
CP 0AH ;>="A"?
JR C,DIGI2 ;/ CHRs BETWEEN "9" & "A" ARE INVALID
DIGI1: CP L ;<BASE VALUE?
JR NC,DIGI2 ;/ NO, INVALID
LD E,A ;(S2)<--(DE) = CONVERTED DIGIT
LD HL,0001H ;(S1)<--TRUE
JP DPUSH
DIGI2: LD L,H ;(HL)<--FALSE
JHPUSH ;(S1)<--FALSE
;
.BYTE 86H ;(FIND) (2-1)FAILURE
.TEXT "(FIND" ; (2-3)SUCCESS
.BYTE ')'+$80
.WORD DIGIT-8
PFIND: .WORD $+2
POP DE ;(DE)<--NFA
PFIN1: POP HL ;(HL)<--STRING ADDR
PUSH HL ;SAVE FOR NEXT ITERATION
LD A,(DE)
XOR (HL) ;FILTER DEVIATIONS
AND 3FH ;MASK MSB & PRECEDENCE BIT
JR NZ,PFIN4 ;LENGTHS DIFFER
PFIN2: INC HL ;(HL)<--ADDR NEXT CHR IN STRING
INC DE ;(DE)<--ADDR NEXT CHR IN NF
LD A,(DE)
XOR (HL) ;FILTER DEVIATIONS
ADD A,A
JR NZ,PFIN3 ;NO MATCH
JR NC,PFIN2 ;MATCH SO FAR, LOOP AGN
LD HL,0005H ;STRING MATCHES
ADD HL,DE ;((SP))<--PFA
EX (SP),HL
PFIN6: DEC DE ;POSN DE ON NFA
LD A,(DE)
OR A ;MSB=1? =LENGTH BYTE
JP P,PFIN6 ;NO, TRY NEXT CHR
LD E,A ;(E)<--LENGTH BYTE
LD D,00H
LD HL,0001H ;(HL)<--TRUE
JP DPUSH ;NF FOUND, RETURN
;
;ABOVE NF NOT A MATCH, TRY NEXT ONE
;
PFIN3: JR C,PFIN5 ;CARRY=END OF NF
PFIN4: INC DE ;FIND END OF NF
LD A,(DE)
OR A ;MSB=1?
JP P,PFIN4 ;NO, LOOP
PFIN5: INC DE ;(DE)<--LFA
EX DE,HL
LD E,(HL)
INC HL
LD D,(HL) ;(DE)<--(LFA)
LD A,D
OR E ;END OF DICTIONARY? (LFA)=0
JR NZ,PFIN1 ;NO, TRY PREVIOUS DEFINITION
POP HL ;DROP STRING ADDR
LD HL,0 ;(HL)<--FALSE
JHPUSH ;NO MATCH FOUND, RETURN
;
.BYTE 87H ;ENCLOSE
.TEXT "ENCLOS"
.BYTE 'E'+$80
.WORD PFIND-9
ENCL: .WORD $+2
POP DE ;(DE)<--(S1)=DELIMITER CHR
POP HL ;(HL)<--(S2)=ADDR OF TEXT TO SCAN
PUSH HL ;(S4)<--ADDR
LD A,E
LD D,A ;(D)<--DELIM CHR
LD E,-1 ;INIT CHR OFFSET COUNTER
DEC HL ;(HL)<--ADDR-1
ENCL1: INC HL ;SKIP OVER LEADING DELIM CHRs
INC E
CP (HL) ;DELIM CHR?
JR Z,ENCL1 ;YES, LOOP
LD D,0
PUSH DE ;(S3)<--(E)=OFFSET TO 1st NON DELIM
LD D,A ;(D)<--DELIM CHR
LD A,(HL)
AND A ;1st non-DELIM=NULL?
JR NZ,ENCL2 ;NO
LD D,0 ;YES
INC E
PUSH DE ;(S2)<--OFFSET TO BYTE FOLLOWING NULL
DEC E
PUSH DE ;(S1)<--OFFSET TO NULL
JNEXT
ENCL2: LD A,D ;(A)<--DELIM CHR
INC HL ;(HL)<--ADDR NEXT CHR
INC E ;(E)<--OFFSET TO NEXT CHR
CP (HL) ;DELIM CHR?
JR Z,ENCL4 ;YES
LD A,(HL)
AND A ;NULL?
JR NZ,ENCL2 ;NO, CONT SCAN
ENCL3: LD D,0
PUSH DE ;(S2)<--OFFSET TO NULL
PUSH DE ;(S1)<--OFFSET TO NULL
JNEXT
ENCL4: LD D,0
PUSH DE ;(S2)<--OFFSET TO BYTE FOLLOWING TEXT
INC E
PUSH DE ;(S1)<--OFFSET TO 2 BYTES AFTER END OF WORD
JNEXT
;
.BYTE 84H ;EMIT
.TEXT "EMI"
.BYTE 'T'+$80
.WORD ENCL-0AH
EMIT: .WORD DOCOL
.WORD PEMIT
.WORD ONE,OUTT
.WORD PSTOR,SEMIS
;
.BYTE 83H ;KEY
.TEXT "KE"
.BYTE 'Y'+$80
.WORD EMIT-7
KEY: .WORD $+2
JP PKEY
;
.BYTE 89H ;?TERMINAL
.TEXT "?TERMINA"
.BYTE 'L'+$80
.WORD KEY-6
QTERM: .WORD $+2
LD HL,0
JP PQTER
;
.BYTE 82H ;CR
.BYTE 'C'
.BYTE 'R'+$80
.WORD QTERM-0CH
CR: .WORD $+2
JP PCR
;
.BYTE 85H ;CMOVE
.TEXT "CMOV"
.BYTE 'E'+$80
.WORD CR-5
CMOVE: .WORD $+2
EXX ;/ SAVE IP
POP BC ; (BC)<--(S1)= #CHRs
POP DE ; (DE)<--(S2)= DEST ADDR
POP HL ;/ (HL)<--(S3)= SOURCE ADDR
LD A,B
OR C ; BC=0?
JR Z,EXCMOV ; YES, DON'T MOVE ANYTHING
LDIR ;/ XFER STRING
EXCMOV: EXX ;/ RESTORE IP
JNEXT
;
.BYTE 86H ; >CMOVE 1.3
.TEXT ">CMOV"
.BYTE 'E'+$80
.WORD CMOVE-8
GCMOV .WORD $+2
EXX ; SAVE IP
POP BC ; (BC)<--(S1)= #CHRs
POP DE ; (DE)<--(S2)= DEST ADDR
POP HL ; (HL)<--(S3)= SOURCE ADDR
ADD HL,BC ; (HL) <- END SOURCE ADDR
EX DE,HL
ADD HL,BC ; (DE) <- END DEST ADDR
EX DE,HL
LD A,B
OR C ; BC=0?
JR Z,EXCMOV ; YES, DON'T MOVE ANYTHING
LDDR ; REVERSE XFER STRING
JR EXCMOV ;
;
.BYTE 82H ;U* 16*16 unsigned multiply
.BYTE 'U' ;994 T cycles average (8080)
.BYTE '*'+$80
.WORD GCMOV-9
USTAR: .WORD $+2
POP DE ;(DE)<--MPLIER
POP HL ;(HL)<--MPCAND
PUSH BC ;SAVE IP
LD B,H
LD A,L ;(BA)<--MPCAND
CALL MPYX ;(AHL)1<--MPCAND.LB*MPLIER
; 1st PARTIAL PRODUCT
PUSH HL ;SAVE (HL)1
LD H,A
LD A,B
LD B,H ;SAVE (A)1
CALL MPYX ;(AHL)2<--MPCAND.HB*MPLIER
; 2nd PARTIAL PRODUCT
POP DE ;(DE)<--(HL)1
LD C,D ;(BC)<--(AH)1
; FORM SUM OF PARTIALS:
; ; (AHL)1
; ;+(AHL)2
; ;-------
; ; (AHLE)
ADD HL,BC ;(HL)<--(HL)2+(AH)1
ADC A,00H ;(AHLE)<--(BA)*(DE)
LD D,L
LD L,H
LD H,A ;(HLDE)<--MPLIER*MPCAND
POP BC ;RESTORE IP
PUSH DE ;(S2)<--PRODUCT.LW
JHPUSH ;(S1)<--PRODUCT.HW
;
; MULTIPLY PRIMITIVE
; (AHL)<--(A)*(DE)
; #BITS: 24 8 16
;
MPYX: LD HL,0 ;(HL)<--0=PARTIAL PRODUCT.LW
LD C,08H ;LOOP COUNTER
MPYX1: ADD HL,HL ;LEFT SHIFT (AHL) 24 BITS
RLA
JR NC,MPYX2 ;IF NEXT MPLIER BIT = 1
ADD HL,DE ;THEN ADD MPCAND
ADC A,0
MPYX2: DEC C ;LAST MPLIER BIT?
JR NZ,MPYX1 ;NO, LOOP AGN
RET ;YES, DONE
;
.BYTE 82H ;U/
.BYTE 'U'
.BYTE '/'+$80
.WORD USTAR-5
USLAS: .WORD $+2
LD HL,0004H
ADD HL,SP ;((HL))<--NUMERATOR.LW
LD E,(HL) ;(DE)<--NUMER.LW
LD (HL),C ;SAVE IP ON STACK
INC HL
LD D,(HL)
LD (HL),B
POP BC ;(BC)<--DENOMINATOR
POP HL ;(HL)<--NUMER.HW
LD A,L
SUB C
LD A,H
SBC A,B ;NUMER >= DENOM?
JR C,USLA1 ;NO, GO AHEAD
LD HL,0FFFFH ;YES, OVERFLOW
LD D,H
LD E,L ;/ SET REM & QUOT TO MAX
JP USLA7
USLA1: LD A,10H ;LOOP COUNTER
USLA2: ADD HL,HL ;LEFT SHIFT (HLDE) THRU CARRY
RLA ;ROT CARRY INTO ACCU BIT 0
EX DE,HL
ADD HL,HL
JR NC,USLA3
INC DE ;ADD CARRY
AND A ;RESET CARRY
USLA3: EX DE,HL ;SHIFT DONE
RRA ;RESTORE 1st CARRY & COUNTER
JR NC,USLA4 ;IF CARRY=1
OR A ;/ RESET CARRY
SBC HL,BC ;/ THEN (HL)<--(HL)-(BC)
JP USLA5
USLA4: SBC HL,BC ;/ (HL)<--PARTIAL REMAINDER
JR NC,USLA5
ADD HL,BC ;UNDERFLOW, RESTORE
DEC DE
USLA5: INC DE ;INC QUOT
DEC A ;COUNTER=0?
JP NZ,USLA2 ;NO, LOOP AGN
USLA7: POP BC ;RESTORE IP
PUSH HL ;(S2)<--REMAINDER
PUSH DE ;(S1)<--QUOTIENT
JNEXT
;
.BYTE 85H ; U/MOD 1.3
.TEXT "U/MO" ; SAME AS U/
.BYTE 'D'+80H
.WORD USLAS-5
USLMD .WORD USLAS+2
;
.BYTE 83H ;AND
.TEXT "AN"
.BYTE 'D'+$80
.WORD USLMD-8
ANDD: .WORD $+2 ;(S1)<--(S1) AND (S2)
POP DE
POP HL
LD A,E
AND L
LD L,A
LD A,D
AND H
LD H,A
JHPUSH
;
.BYTE 82H ;OR
.BYTE 'O'
.BYTE 'R'+$80
.WORD ANDD-6
ORR: .WORD $+2 ;(S1)<--(S1) OR (S2)
POP DE
POP HL
LD A,E
OR L
LD L,A
LD A,D
OR H
LD H,A
JHPUSH
;
.BYTE 83H ;XOR
.TEXT "XO"
.BYTE 'R'+$80
.WORD ORR-5
XORR: .WORD $+2 ;(S1)<--(S1) XOR (S2)
POP DE
POP HL
LD A,E
XOR L
LD L,A
LD A,D
XOR H
LD H,A
JHPUSH
;
.BYTE 83H ;SP@
.TEXT "SP"
.BYTE '@'+$80
.WORD XORR-6
SPAT: .WORD $+2 ;(S1)<--(SP)
LD HL,0
ADD HL,SP ;(HL)<--(SP)
JHPUSH
;
.BYTE 83H ;SP!
.TEXT "SP"
.BYTE '!'+$80
.WORD SPAT-6
SPSTO: .WORD $+2 ;(SP)<--(S0) (USER VARIABLE)
LD HL,(UP) ;(HL)<--USER VAR BASE ADDR
LD DE,0006H
ADD HL,DE ;(HL)<--S0
LD E,(HL)
INC HL
LD D,(HL) ;(DE)<--(S0)
EX DE,HL
LD SP,HL ;(SP)<--(S0)
JNEXT
;
.BYTE 83H ;RP@
.TEXT "RP"
.BYTE '@'+$80
.WORD SPSTO-6
RPAT: .WORD $+2 ;(S1)<--(RP)
LD HL,(RPP)
JHPUSH
;
.BYTE 83H ;RP!
.TEXT "RP"
.BYTE '!'+$80
.WORD RPAT-6
RPSTO: .WORD $+2 ;(RP)<--(R0) (USER VARIABLE)
LD HL,(UP) ;(HL)<--USER VAR BASE ADDR
LD DE,0008H
ADD HL,DE ;(HL)<--R0
LD E,(HL)
INC HL
LD D,(HL) ;(DE)<--(R0)
LD (RPP),DE ;/ (RP)<--(R0)
JNEXT
;
.BYTE 82H ; ;S
.BYTE ';'
.BYTE 'S'+$80
.WORD RPSTO-6
SEMIS: .WORD $+2 ;(IP)<--(R1)
LD HL,(RPP)
LD C,(HL)
INC HL
LD B,(HL) ;(BC)<--(R1)
INC HL
LD (RPP),HL ;(RP)<--(RP)+2
JNEXT
;
.BYTE 84H ; EXIT 1.3
.TEXT "EXI"
.BYTE 'T'+80H
.WORD SEMIS-5
EXIT .WORD SEMIS+2
;
.BYTE 85H ;LEAVE
.TEXT "LEAV"
.BYTE 'E'+$80
.WORD EXIT-7
LEAVE: .WORD $+2 ;LIMIT<--INDEX
LD HL,(RPP)
LD E,(HL)
INC HL
LD D,(HL) ;(DE)<--(R1)=INDEX
INC HL
LD (HL),E
INC HL
LD (HL),D ;(R2)<--(DE)=LIMIT
JNEXT
;
.BYTE 82H ;>R
.BYTE '>'
.BYTE 'R'+$80
.WORD LEAVE-8
TOR: .WORD $+2
POP DE
LD HL,(RPP)
DEC HL
LD (HL),D
DEC HL
LD (HL),E ;/ (R1)<--(DE)
LD (RPP),HL ; (RP)<--(RP)
JNEXT
;
.BYTE 82H ;R>
.BYTE 'R'
.BYTE '>'+$80
.WORD TOR-5
FROMR: .WORD $+2
LD HL,(RPP)
LD E,(HL)
INC HL
LD D,(HL)
INC HL
LD (RPP),HL
PUSH DE ;(S1)<--(R1)
JNEXT
;
.BYTE 81H ;R
.BYTE 'R'+$80
.WORD FROMR-5
RR: .WORD IDO+2
;
.BYTE 82H ; R@ 1.3
.BYTE 'R'
.BYTE '@'+$80
.WORD RR-4
RAT .WORD IDO+2
;
.BYTE 82H ;0=
.BYTE '0'
.BYTE '='+$80
.WORD RAT-5
ZEQU: .WORD $+2
POP HL
LD A,L
OR H
LD HL,0
JR NZ,ZEQU1
INC L ;(HL)<--TRUE
ZEQU1: JHPUSH
;
.BYTE 82H ;0<
.BYTE '0'
.BYTE '<'+$80
.WORD ZEQU-5
ZLESS: .WORD $+2
POP AF ;/ (A)<--(S1)H
RLA ;/ (CARRY)<--BIT 7
LD HL,0 ; (HL)<--FALSE
JR NC,ZLES1
INC L ; (HL)<--TRUE
ZLES1: JHPUSH
;
.BYTE 81H ;+
.BYTE '+'+$80
.WORD ZLESS-5
PLUS: .WORD $+2
POP DE
POP HL
ADD HL,DE
JHPUSH
;
.BYTE 82H ;D+ ( d1L d1H d2L d2h -- d3L d3H)
.BYTE 'D'
.BYTE '+'+$80
.WORD PLUS-4
DPLUS: .WORD $+2
EXX ;/ SAVE IP
POP BC ; (BC)<--d2H
POP HL ; (HL)<--d2L
POP AF ;d (AF)<--d1H
POP DE ; (DE)<--d1L
PUSH AF ;/ (S1)<--d1H
ADD HL,DE ; (HL)<--d2L+d1L=d3L
EX DE,HL ; (DE)<--d3L
POP HL ; (HL)<--d1H
ADC HL,BC ;/ (HL)<--d1H+d2H+CARRY=d3H
PUSH DE ; (S2)<--d3L
PUSH HL ;/ (S1)<--d3H
EXX ;/ RESTORE IP
JNEXT
;
.BYTE 85H ;MINUS
.TEXT "MINU"
.BYTE 'S'+$80
.WORD DPLUS-5
MINUS: .WORD $+2
POP DE ;/
XOR A ;/ RESET CARRY, (A)<--0
LD H,A ;/
LD L,A ;/ LD HL,0
SBC HL,DE ;/ (HL)<--(DE)2's COMPL.
JHPUSH
;
.BYTE 86H ; NEGATE 1.3
.TEXT "NEGAT"
.BYTE 'E'+$80
.WORD MINUS-8
NEG .WORD MINUS+2
;
.BYTE 86H ;DMINUS
.TEXT "DMINU"
.BYTE 'S'+$80
.WORD NEG-9
DMINU: .WORD $+2
POP HL ;(HL)<--d1H
POP DE ;(DE)<--d1L
SUB A ;(A)<--0
SUB E
LD E,A ;(E)<--NEG(E)
LD A,00H
SBC A,D
LD D,A ;(D)<--NEG(D)
LD A,00H
SBC A,L
LD L,A ;(L)<--NEG(L)
LD A,00H
SBC A,H
LD H,A ;(H)<--NEG(H)
JP DPUSH ;(S2)<--d2L, (S1)<--d2H
;
.BYTE 84H ;OVER
.TEXT "OVE"
.BYTE 'R'+$80
.WORD DMINU-9
OVER: .WORD $+2
POP DE
POP HL
PUSH HL
JP DPUSH
;
.BYTE 84H ;DROP
.TEXT "DRO"
.BYTE 'P'+$80
.WORD OVER-7
DROP: .WORD $+2
POP HL
JNEXT
;
.BYTE 84H ;SWAP
.TEXT "SWA"
.BYTE 'P'+$80
.WORD DROP-7
SWAP: .WORD $+2
POP HL
EX (SP),HL
JHPUSH
;
.BYTE 83H ;DUP
.TEXT "DU"
.BYTE 'P'+$80
.WORD SWAP-7
DUP: .WORD $+2
POP HL
PUSH HL
JHPUSH
;
.BYTE 84H ;2DUP
.TEXT "2DU"
.BYTE 'P'+$80
.WORD DUP-6
TDUP: .WORD $+2
POP HL