Now and then I want to compare Z-code assembly listings from Inform (or txd) to ZIL code. Then I realize that I don’t have a handy chart to translate one set of opcode names to the other.
So here’s that.
Number Inform name ZIL name ZIL def
1 @je EQUAL? 2OP:1
2 @jl LESS? 2OP:2
3 @jg GRTR? 2OP:3
4 @dec_chk DLESS? 2OP:4
5 @inc_chk IGRTR? 2OP:5
6 @jin IN? 2OP:6
7 @test BTST 2OP:7
8 @or BOR 2OP:8
9 @and BAND 2OP:9
10 @test_attr FSET? 2OP:10
11 @set_attr FSET 2OP:11
12 @clear_attr FCLEAR 2OP:12
13 @store SET 2OP:13
14 @insert_obj MOVE 2OP:14
15 @loadw GET 2OP:15
16 @loadb GETB 2OP:16
17 @get_prop GETP 2OP:17
18 @get_prop_addr GETPT 2OP:18
19 @get_next_prop NEXTP 2OP:19
20 @add ADD 2OP:20
21 @sub SUB 2OP:21
22 @mul MUL 2OP:22
23 @div DIV 2OP:23
24 @mod MOD 2OP:24
25 @call_2s CALL2 2OP:25
26 @call_2n ICALL2 2OP:26
27 @set_colour COLOR 2OP:27
28 @throw THROW 2OP:28
128 @jz ZERO? 1OP:128
129 @get_sibling NEXT? 1OP:129
130 @get_child FIRST? 1OP:130
131 @get_parent LOC 1OP:131
132 @get_prop_len PTSIZE 1OP:132
133 @inc INC 1OP:133
134 @dec DEC 1OP:134
135 @print_addr PRINTB 1OP:135
136 @call_1s CALL1 1OP:136
137 @remove_obj REMOVE 1OP:137
138 @print_obj PRINTD 1OP:138
139 @ret RETURN 1OP:139
140 @jump JUMP 1OP:140
141 @print_paddr PRINT 1OP:141
142 @load VALUE 1OP:142
143 @call_1n ICALL1 1OP:143
176 @rtrue RTRUE 0OP:176
177 @rfalse RFALSE 0OP:177
178 @print PRINTI 0OP:178
179 @print_ret PRINTR 0OP:179
180 @nop NOOP 0OP:180
183 @restart RESTART 0OP:183
184 @ret_popped RSTACK 0OP:184
185 @catch CATCH 0OP:185
186 @quit QUIT 0OP:186
187 @new_line CRLF 0OP:187
188 @show_status USL 0OP:188
189 @verify VERIFY 0OP:189
191 @piracy ORIGINAL? 0OP:191
193 @je EQUAL? EXT:193
224 @call_vs CALL EXT:224
225 @storew PUT EXT:225
226 @storeb PUTB EXT:226
227 @put_prop PUTP EXT:227
228 @read READ EXT:228
229 @print_char PRINTC EXT:229
230 @print_num PRINTN EXT:230
231 @random RANDOM EXT:231
232 @push PUSH EXT:232
233 @pull POP EXT:233
234 @split_window SPLIT EXT:234
235 @set_window SCREEN EXT:235
236 @call_vs2 XCALL EXT:236
237 @erase_window CLEAR EXT:237
238 @erase_line ERASE EXT:238
239 @set_cursor CURSET EXT:239
240 @get_cursor CURGET EXT:240
241 @set_text_style HLIGHT EXT:241
242 @buffer_mode BUFOUT EXP:242
243 @output_stream DIROUT EXT:243
244 @input_stream DIRIN EXT:244
245 @sound_effect SOUND EXT:245
246 @read_char INPUT EXT:246
247 @scan_table INTBL? EXT:247
248 @not BCOM 1OP:248
249 @call_vn ICALL EXT:249
250 @call_vn2 IXCALL EXT:250
251 @tokenise LEX EXT:251
252 @encode_text ZWSTR EXT:252
253 @copy_table COPYT EXT:253
254 @print_table PRINTT EXT:254
255 @check_arg_count ASSIGNED? EXT:255
EXT:0 @save SAVE EXT:256
EXT:1 @restore RESTORE EXT:257
EXT:2 @log_shift SHIFT EXT:258
EXT:3 @art_shift ASHIFT EXT:259
EXT:4 @set_font FONT EXT:260
EXT:5 @draw_picture DISPLAY EXT:261
EXT:6 @picture_data PICINF EXT:262
EXT:7 @erase_picture DCLEAR EXT:263
EXT:8 @set_margins MARGIN EXT:264
EXT:9 @save_undo ISAVE EXT:265
EXT:10 @restore_undo IRESTORE EXT:266
EXT:11 @print_unicode (zspec-1.0)
EXT:12 @check_unicode (zspec-1.0)
EXT:13 @set_true_colour (zspec-1.1)
EXT:16 @move_window WINPOS EXT:272
EXT:17 @window_size WINSIZE EXT:273
EXT:18 @window_style WINATTR EXT:274
EXT:19 @get_wind_prop WINGET EXT:275
EXT:20 @scroll_window SCROLL EXT:276
EXT:21 @pop_stack FSTACK EXT:277
EXT:22 @read_mouse MOUSE-INFO EXT:278
EXT:23 @mouse_window MOUSE-LIMIT EXT:279
EXT:24 @push_stack XPUSH EXT:280
EXT:25 @put_wind_prop WINPUT EXT:281
EXT:26 @print_form PRINTF EXT:282
EXT:27 @make_menu MENU EXT:283
EXT:28 @picture_table PICSET EXT:284
EXT:29 @buffer_screen (zspec-1.1)
Notes:
These names are taken from a late (v6) Infocom spec document. A few v3 opcodes were moved or changed in later versions. This table lists the later version and omits the v3-only version.
Four opcodes were added by the modern Z-spec, so they have no ZIL equivalent.
PICSET (@picture_table) is not documented in the Infocom documents that I know of, but it’s used in Shogun and Zork Zero.