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192 lines
6.4 KiB
Plaintext
192 lines
6.4 KiB
Plaintext
; Copyright 2018 faddenSoft. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Sources:
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; What's Where in the Apple, by William F. Luebbert
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; S-C DocuMentor: Applesoft, by Bob Sander-Cederlof
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*SYNOPSIS Applesoft BASIC addresses and constants
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BAS_USRVEC @ $0A 3 ;USR() command vector
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BAS_CHARAC @ $0D ;used by string utility
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BAS_ENDCHR @ $0E ;used by string utility
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BAS_VALTYP @ $11 2 ;flag for last FAC operation ($00=num, $FF=str)
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BAS_SUBFLG @ $14 ;subscript flag ($00=allowed, $80=not)
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BAS_HCOLOR1 @ $1C ;hi-res color mask
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BAS_COUNTH @ $1D ;hi-res high-order byte of step for line
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BAS_HBASL @ $26 ;base address for hi-res drawing (lo part)
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BAS_HBASH @ $27 ;base address for hi-res drawing (hi part)
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BAS_HMASK @ $30 ;hi-res graphics on-the-fly bit mask
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BAS_LINNUM @ $50 2 ;line number (2b)
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BAS_TEMPPT @ $52 2 ;temporary point (2b)
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BAS_INDEX @ $5E 2 ;temp (stack) pointer for moving strings (2b)
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BAS_TEXTTAB @ $67 2 ;pointer to start of Applesoft program (2b)
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BAS_VARTAB @ $69 2 ;pointer to start of Applesoft variables (2b)
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BAS_ARYTAB @ $6B 2 ;pointer to start of Applesoft array space (2b)
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BAS_STREND @ $6D 2 ;pointer to end of numeric storage (2b)
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BAS_FRETOP @ $6F 2 ;pointer to end of string storage (2b)
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BAS_MEMSIZE @ $73 2 ;HIMEM (2b)
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BAS_CURLIN @ $75 2 ;current line number (2b)
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BAS_OLDLIN @ $77 2 ;last line executed (2b)
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BAS_OLDTEXT @ $79 2 ;old text pointer (2b)
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BAS_DATLIN @ $7B 2 ;current line # from which data is being read (2b)
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BAS_DATPTR @ $7D 2 ;points to mem from which data is being read (2b)
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BAS_VARNAM @ $81 2 ;holds last-used variable's name (2b)
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BAS_VARPNT @ $83 2 ;pointer to last-used variable's value (2b)
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BAS_FORPNT @ $85 2 ;general pointer (2b)
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BAS_JMPADRS @ $90 3 ;jump address; $90 is set to $4C (3b)
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BAS_TEMP1 @ $93 ;fp math register
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BAS_HIGHDS @ $94 2 ;block copy pointer (2b)
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BAS_HIGHTR @ $96 2 ;block copy pointer (2b)
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BAS_TEMP2 @ $98 ;fp math register
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BAS_LOWTR @ $9B 2 ;general pointer (2b)
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BAS_FAC @ $9D 6 ;floating point accumulator (6b)
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BAS_FACMO = $A0 ;middle-order byte of mantissa of FAC
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BAS_FACLO = $A1 ;low-order byte of mantissa of FAC
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BAS_FACSIGN @ $A2 ;single byte sign of FAC
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BAS_ARG @ $A5 6 ;secondary floating point accumulator (6b)
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BAS_STRNG1 @ $AB 2 ;pointer to a string (2b)
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BAS_STRNG2 @ $AD 2 ;pointer to a string (2b)
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BAS_PRGEND @ $AF 2 ;pointer to end of program (2b)
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BAS_CHRGET @ $B1 ;get next character or Applesoft token
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BAS_CHRGOT @ $B7 ;get next, but don't advance TXTPTR
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BAS_TXTPTR @ $B8 2 ;points at next char or token (2b)
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BAS_RND @ $C9 5 ;floating point random number (5b)
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BAS_AUTORUN @ $D6 ;set to $80 to auto-run
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BAS_ERRFLG @ $D8 ;$80 if onerr active
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BAS_HPAG @ $E6 ;hi-res page to draw on ($20 or $40)
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BAS_SCALE @ $E7 ;hi-res graphics scale factor
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BAS_HSHAPE @ $E8 2 ;hi-res shape table pointer (2b)
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BAS_FIRST @ $F0 ;used for lo-res plot coordinates
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BAS_SPEEDZ @ $F1 ;controls text output speed
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BAS_ORMASK @ $F3 ;mask for output control
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BAS_REMSTK @ $F8 ;stack pointer saved before each statement
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BAS_AMPERV @ $03F5 3 ;JMP to function that handles Applesoft '&' cmds
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;
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; Useful Applesoft routines.
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; TODO: there are many more
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;
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BAS_ERROR @ $D412 ;print error based on X-reg
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BAS_FRMNUM @ $DD67 ;evalute expression at TXTPTR, result into FAC
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BAS_SYN_ERROR @ $DEC9 ;throw SYNTAX ERROR
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BAS_CHKCOM @ $DEBE ;checks TXTPTR for comma
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BAS_ILLQ_ERROR @ $E199 ;throw ILLEGAL QUANTITY ERROR
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BAS_GETADR @ $E752 ;convert FAC to 2-byte integer in LINNUM
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BAS_GETBYT @ $E6F8 ;gets byte, in X/FACLO
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BAS_HFNS @ $F6B9 ;get hi-res x/y for hplot
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;
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; Applesoft BASIC tokens.
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;
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*TAG Applesoft-Tokens
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TOK_END = $80
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TOK_FOR = $81
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TOK_NEXT = $82
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TOK_DATA = $83
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TOK_INPUT = $84
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TOK_DEL = $85
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TOK_DIM = $86
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TOK_READ = $87
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TOK_GR = $88
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TOK_TEXT = $89
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TOK_PR = $8a
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TOK_IN = $8b
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TOK_CALL = $8c
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TOK_PLOT = $8d
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TOK_HLIN = $8e
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TOK_VLIN = $8f
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TOK_HGR2 = $90
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TOK_HGR = $91
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TOK_HCOLOR = $92
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TOK_HPLOT = $93
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TOK_DRAW = $94
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TOK_XDRAW = $95
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TOK_HTAB = $96
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TOK_HOME = $97
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TOK_ROT = $98
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TOK_SCALE = $99
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TOK_SHLOAD = $9a
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TOK_TRACE = $9b
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TOK_NOTRACE = $9c
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TOK_NORMAL = $9d
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TOK_INVERSE = $9e
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TOK_FLASH = $9f
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TOK_COLOR = $a0
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TOK_POP = $a1
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TOK_VTAB = $a2
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TOK_HIMEM = $a3
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TOK_LOMEM = $a4
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TOK_ONERR = $a5
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TOK_RESUME = $a6
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TOK_RECALL = $a7
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TOK_STORE = $a8
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TOK_SPEED = $a9
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TOK_LET = $aa
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TOK_GOTO = $ab
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TOK_RUN = $ac
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TOK_IF = $ad
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TOK_RESTORE = $ae
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TOK_AMPER = $af
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TOK_GOSUB = $b0
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TOK_RETURN = $b1
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TOK_REM = $b2
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TOK_STOP = $b3
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TOK_ON = $b4
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TOK_WAIT = $b5
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TOK_LOAD = $b6
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TOK_SAVE = $b7
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TOK_DEF = $b8
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TOK_POKE = $b9
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TOK_PRINT = $ba
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TOK_CONT = $bb
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TOK_LIST = $bc
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TOK_CLEAR = $bd
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TOK_GET = $be
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TOK_NEW = $bf
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TOK_TAB = $c0
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TOK_TO = $c1
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TOK_FN = $c2
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TOK_SPC = $c3
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TOK_THEN = $c4
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TOK_AT = $c5
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TOK_NOT = $c6
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TOK_STEP = $c7
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TOK_PLUS = $c8
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TOK_MINUS = $c9
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TOK_MULT = $ca
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TOK_DIV = $cb
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TOK_EXPOP = $cc
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TOK_AND = $cd
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TOK_OR = $ce
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TOK_GREATER = $cf
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TOK_EQUAL = $d0
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TOK_LESSER = $d1
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TOK_SGN = $d2
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TOK_INT = $d3
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TOK_ABS = $d4
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TOK_USR = $d5
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TOK_FRE = $d6
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TOK_SCRN = $d7
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TOK_PDL = $d8
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TOK_POS = $d9
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TOK_SQR = $da
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TOK_RND = $db
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TOK_LOG = $dc
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TOK_EXP = $dd
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TOK_COS = $de
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TOK_SIN = $df
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TOK_TAN = $e0
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TOK_ATN = $e1
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TOK_PEEK = $e2
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TOK_LEN = $e3
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TOK_STR = $e4
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TOK_VAL = $e5
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TOK_ASC = $e6
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TOK_CHR = $e7
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TOK_LEFT = $e8
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TOK_RIGHT = $e9
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TOK_MID = $ea
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; end of tokens
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