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Diffstat (limited to 'utils/ihx2tzx/zxbasic.pas')
| -rw-r--r-- | utils/ihx2tzx/zxbasic.pas | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/utils/ihx2tzx/zxbasic.pas b/utils/ihx2tzx/zxbasic.pas new file mode 100644 index 0000000000..f27d04dfeb --- /dev/null +++ b/utils/ihx2tzx/zxbasic.pas @@ -0,0 +1,158 @@ +{ IHX (Intel Hex format) to TZX (ZX Spectrum tape file format) convertor tool + + This file contains various definitions, constants and utility functions for + dealing with BASIC programs on the ZX Spectrum. + + Copyright (C) 2020 Nikolay Nikolov <nickysn@users.sourceforg.net> + + This source is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at your option) + any later version. + + This code is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + details. + + A copy of the GNU General Public License is available on the World Wide Web + at <http://www.gnu.org/copyleft/gpl.html>. You can also obtain it by writing + to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, + Boston, MA 02110-1335, USA. +} + +unit zxbasic; + +{$mode objfpc}{$H+} + +interface + +uses + Classes, SysUtils; + +const + { the ZX BASIC special keyword character set } + BC_RND = #165; { RND } + BC_INKEYS = #166; { INKEY$ } + BC_PI = #167; { PI } + BC_FN = #168; { FN } + BC_POINT = #169; { POINT } + BC_SCREENS = #170; { SCREEN$ } + BC_ATTR = #171; { ATTR } + BC_AT = #172; { AT } + BC_TAB = #173; { TAB } + BC_VALS = #174; { VAL$ } + BC_CODE = #175; { CODE } + BC_VAL = #176; { VAL } + BC_LEN = #177; { LEN } + BC_SIN = #178; { SIN } + BC_COS = #179; { COS } + BC_TAN = #180; { TAN } + BC_ASN = #181; { ASN } + BC_ACS = #182; { ACS } + BC_ATN = #183; { ATN } + BC_LN = #184; { LN } + BC_EXP = #185; { EXP } + BC_INT = #186; { INT } + BC_SOR = #187; { SOR } + BC_SGN = #188; { SGN } + BC_ABS = #189; { ABS } + BC_PEEK = #190; { PEEK } + BC_IN = #191; { IN } + BC_USR = #192; { USR } + BC_STRS = #193; { STR$ } + BC_CHRS = #194; { CHR$ } + BC_NOT = #195; { NOT } + BC_BIN = #196; { BIN } + BC_OR = #197; { OR } + BC_AND = #198; { AND } + BC_LE = #199; { <= } + BC_GE = #200; { >= } + BC_NEQ = #201; { <> } + BC_LINE = #202; { LINE } + BC_THEN = #203; { THEN } + BC_TO = #204; { TO } + BC_STEP = #205; { STEP } + BC_DEF_FN = #206; { DEF FN } + BC_CAT = #207; { CAT } + BC_FORMAT = #208; { FORMAT } + BC_MOVE = #209; { MOVE } + BC_ERASE = #210; { ERASE } + BC_OPEN = #211; { OPEN } + BC_CLOSE = #212; { CLOSE } + BC_MERGE = #213; { MERGE } + BC_VERIFY = #214; { VERIFY } + BC_BEEP = #215; { BEEP } + BC_CIRCLE = #216; { CIRCLE } + BC_INK = #217; { INK } + BC_PAPER = #218; { PAPER } + BC_FLASH = #219; { FLASH } + BC_BRIGHT = #220; { BRIGHT } + BC_INVERSE = #221; { INVERSE } + BC_OVER = #222; { OVER } + BC_OUT = #223; { OUT } + BC_LPRINT = #224; { LPRINT } + BC_LLIST = #225; { LLIST } + BC_STOP = #226; { STOP } + BC_READ = #227; { READ } + BC_DATA = #228; { DATA } + BC_RESTORE = #229; { RESTORE } + BC_NEW = #230; { NEW } + BC_BORDER = #231; { BORDER } + BC_CONTINUE = #232; { CONTINUE } + BC_DIM = #233; { DIM } + BC_REM = #234; { REM } + BC_FOR = #235; { FOR } + BC_GO_TO = #236; { GO TO } + BC_GO_SUB = #237; { GO SUB } + BC_INPUT = #238; { INPUT } + BC_LOAD = #239; { LOAD } + BC_LIST = #240; { LIST } + BC_LET = #241; { LET } + BC_PAUSE = #242; { PAUSE } + BC_NEXT = #243; { NEXT } + BC_POKE = #244; { POKE } + BC_PRINT = #245; { PRINT } + BC_PLOT = #246; { PLOT } + BC_RUN = #247; { RUN } + BC_SAVE = #248; { SAVE } + BC_RANDOMIZE = #249; { RANDOMIZE } + BC_IF = #250; { IF } + BC_CLS = #251; { CLS } + BC_DRAW = #252; { DRAW } + BC_CLEAR = #253; { CLEAR } + BC_RETURN = #254; { RETURN } + BC_COPY = #255; { COPY } + +function BAS_EncodeNumber(N: Integer): ansistring; +function BAS_EncodeNumber(N: Real): ansistring; +function BAS_EncodeLine(LineNr: Integer; const Line: string): ansistring; + +implementation + +function BAS_EncodeNumber(N: Integer): ansistring; +begin + if (N >= -65535) and (N <= 65535) then + begin + Str(N, Result); + N := Abs(N); + Result := Result + #14#0#0 + Chr(Byte(N)) + Chr(Byte(N shr 8)) + #0; + end + else + Result := BAS_EncodeNumber(Real(N)); +end; + +function BAS_EncodeNumber(N: Real): ansistring; +begin + raise ENotImplemented.Create('Real number support not yet implemented'); +end; + +function BAS_EncodeLine(LineNr: Integer; const Line: string): ansistring; +begin + Result := Chr(Byte(LineNr shr 8)) + Chr(Byte(LineNr)) + + Chr(Byte((Length(Line) + 1))) + Chr(Byte((Length(Line) + 1) shr 8)) + + Line + #13; +end; + +end. + |