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163 lines
4.0 KiB
Plaintext
163 lines
4.0 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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*SYNOPSIS Applesoft BASIC addresses and constants
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HCOLOR1 @ $1C ;hi-res color mask
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COUNTH @ $1D ;hi-res high-order byte of step for line
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HBASL @ $26 ;base address for hi-res drawing
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RNDL @ $4E ;low byte of KEYIN "random" value
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RNDH @ $4F ;high byte of KEYIN "random" value
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LINNUM @ $50 ;line number ($50-51)
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TEXTTAB @ $67 ;pointer to start of Applesoft program (2b)
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VARTAB @ $69 ;pointer to start of Applesoft variables (2b)
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ARYTAB @ $6B ;pointer to start of Applesoft array space (2b)
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STREND @ $6D ;pointer to end of numeric storage (2b)
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FRETOP @ $6F ;pointer to end of string storage (2b)
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MEMSIZE @ $73 ;Applesoft HIMEM (2b)
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CURLIN @ $75 ;Applesoft current line number (2b)
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FACMO @ $A0 ;middle-order byte of mantissa of FAC
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FACLO @ $A1 ;low-order byte of mantissa of FAC
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FACSIGN @ $A2 ;single byte sign of FAC
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CHRGET @ $B1 ;get next character or Applesoft token
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CHRGOT @ $B7 ;get next, but don't advance TXTPTR
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TXTPTR @ $B8 ;points at next char or token
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AUTORUN @ $D6 ;set to $80 to auto-run
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ERRFLG @ $D8 ;$80 if onerr active
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HPAG @ $E6 ;hi-res page to draw on ($20 or $40)
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SCALE @ $E7 ;hi-res graphics scale factor
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AMPERV @ $03F5 ;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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ERROR @ $D412 ;print error based on X-reg
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FRMNUM @ $DD67 ;evalute expression at TXTPTR, result into FAC
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SYN_ERROR @ $DEC9 ;throw SYNTAX ERROR
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CHKCOM @ $DEBE ;checks TXTPTR for comma
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ILLQ_ERROR @ $E199 ;throw ILLEGAL QUANTITY ERROR
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GETADR @ $E752 ;convert FAC to 2-byte integer in LINNUM
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GETBYT @ $E6F8 ;gets byte, in X/FACLO
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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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