Tandy 200 BASIC tokenized file
From Just Solve the File Format Problem
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|PL PH | |PL PH | ||
|2 bytes | |2 bytes | ||
| − | |Address of the next line in memory, little endian. | + | |Address of the next line in memory, little endian. This data can be ignored as it is only a placeholder. The value of PL PH in a file is moot because the address is recalculated every time the program loads. Once in memory, PL PH is used to skip to the line required for GOTO, GOSUB, and READ, thus speeding up the program. |
|- | |- | ||
|LL LH | |LL LH | ||
| Line 296: | Line 296: | ||
|NULL | |NULL | ||
|1 byte | |1 byte | ||
| − | |NULL byte ( | + | |NULL byte (`0x00`) to signal end of line. |
|} | |} | ||
Revision as of 06:29, 26 July 2022
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. This data can be ignored as it is only a placeholder. The value of PL PH in a file is moot because the address is recalculated every time the program loads. Once in memory, 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 (`0x00`) to signal end of line. |
