Tandy 200 BASIC tokenized file
From Just Solve the File Format Problem
Tandy 200 BASIC was a version of Microsoft BASIC for the Radio Shack Tandy 200 computer. The tokenization for the TRS-80 Model 100/102 and NEC PC-8201/8300 should be similar, if not identical.
Contents |
Tokens
Blank values indicate either that the token is unused or is used for something unknown.
| Hex | Dec | Token meaning |
|---|---|---|
| 80 | 128 | END |
| 81 | 129 | FOR |
| 82 | 130 | NEXT |
| 83 | 131 | DATA |
| 84 | 132 | INPUT |
| 85 | 133 | DIM |
| 86 | 134 | READ |
| 87 | 135 | LET |
| 88 | 136 | GOTO |
| 89 | 137 | RUN |
| 8A | 138 | IF |
| 8B | 139 | RESTORE |
| 8C | 140 | GOSUB |
| 8D | 141 | RETURN |
| 8E | 142 | REM |
| 8F | 143 | STOP |
| 90 | 144 | WIDTH |
| 91 | 145 | ELSE |
| 92 | 146 | LINE |
| 93 | 147 | EDIT |
| 94 | 148 | ERROR |
| 95 | 149 | RESUME |
| 96 | 150 | OUT |
| 97 | 151 | ON |
| 98 | 152 | DSKO$ |
| 99 | 153 | OPEN |
| 9A | 154 | CLOSE |
| 9B | 155 | LOAD |
| 9C | 156 | MERGE |
| 9D | 157 | FILES |
| 9E | 158 | SAVE |
| 9F | 159 | LFILES |
| A0 | 160 | LPRINT |
| A1 | 161 | DEF |
| A2 | 162 | POKE |
| A3 | 163 | |
| A4 | 164 | CONT |
| A5 | 165 | LIST |
| A6 | 166 | LLIST |
| A7 | 167 | CLEAR |
| A8 | 168 | CLOAD |
| A9 | 169 | CSAVE |
| AA | 170 | TIME$ |
| AB | 171 | DATE$ |
| AC | 172 | DAY$ |
| AD | 173 | COM |
| AE | 174 | MDM |
| AF | 175 | KEY |
| B0 | 176 | CLS |
| B1 | 177 | BEEP |
| B2 | 178 | SOUND |
| B3 | 179 | LCOPY |
| B4 | 180 | PSET |
| B5 | 181 | PRESET |
| B6 | 182 | MOTOR |
| B7 | 183 | MAX |
| B8 | 184 | POWER |
| B9 | 185 | CALL |
| BA | 186 | MENU |
| BB | 187 | IPL |
| BC | 188 | NAME |
| BD | 189 | KILL |
| BE | 190 | SCREEN |
| BF | 191 | NEW |
| C0 | 192 | TAB( |
| C1 | 193 | TO |
| C2 | 194 | USING |
| C3 | 195 | VARPTR |
| C4 | 196 | ERL |
| C5 | 197 | ERR |
| C6 | 198 | STRING$ |
| C7 | 199 | INSTR |
| C8 | 200 | DSKI$ |
| C9 | 201 | INKEY$ |
| CA | 202 | CSRLIN |
| CB | 203 | OFF |
| CC | 204 | HIMEM |
| CD | 205 | THEN |
| CE | 206 | NOT |
| CF | 207 | STEP |
| D0 | 208 | + |
| D1 | 209 | - |
| D2 | 210 | * |
| D3 | 211 | / |
| D4 | 212 | ^ |
| D5 | 213 | AND |
| D6 | 214 | OR |
| D7 | 215 | XOR |
| D8 | 216 | EQV |
| D9 | 217 | IMP |
| DA | 218 | MOD |
| DB | 219 | \ |
| DC | 220 | > |
| DD | 221 | = |
| DE | 222 | |
| DF | 223 | SGN |
| E0 | 224 | INT |
| E1 | 225 | ABS |
| E2 | 226 | FRE |
| E3 | 227 | INP |
| E4 | 228 | LPOS |
| E5 | 229 | POS |
| E6 | 230 | SQR |
| E7 | 231 | RND |
| E8 | 232 | LOG |
| E9 | 233 | EXP |
| EA | 234 | COS |
| EB | 235 | SIN |
| EC | 236 | TAN |
| ED | 237 | ATN |
| EE | 238 | PEEK |
| EF | 239 | EOF |
| F0 | 240 | LOC |
| F1 | 241 | LOF |
| F2 | 242 | CINT |
| F3 | 243 | CSNG |
| F4 | 244 | CDBL |
| F5 | 245 | FIX |
| F6 | 246 | LEN |
| F7 | 247 | STR$ |
| F8 | 248 | VAL |
| F9 | 249 | ASC |
| FA | 250 | CHR$ |
| FB | 251 | SPACE$ |
| FC | 252 | LEFT$ |
| FD | 253 | RIGHT$ |
| FE | 254 | MID$ |
| FF | 255 | ' (QUOTE) |
File Format
Tokenised BASIC code is a sequence of tokenized lines. Each tokenized line has the following format:
| Name | Length | Description |
|---|---|---|
| PL PH | 2 bytes | Address of the next line in memory, little endian. With one exception, this data can be ignored as it is only a placeholder. The exception is that the end of the program listing is marked by PL PH == 00 00. The value of PL PH in a file does not matter because the address is recalculated every time the program loads. PL PH is used to skip to the line required for GOTO, GOSUB, and READ, thus speeding up the program. |
| LL LH | 2 bytes | Line number, little endian. |
| B0 … BN | Any number | Sequence of tokens or ASCII characters. If a character's value is ≥ 128, then it is a token. All tokens are a single byte. |
| NULL | 1 byte | NULL byte (00) to signal end of line. |
