BBC MIcro Game Memory Locations.md

Data Locations

These are the memory location for BBC Micro debugging of each of the labels in the assembly code. Useful for setting breakpoints and looking at memory locations. Will also work for the datafile however the load address for each will have to be subtracted

Label	Adventure Quest	Colossal Adventure	Dungeon Adventure	Lords of Time	Snowball
data_dictionary_start	1c58	1180	1100	1220	1180
data_exits_start	1920	1530	e20	1b00	1890
data_list1_start	1bd0	n/a	17b0	1e00	1af0
data_list2_start	n/a	1896	n/a	n/a	n/a
data_list3_start	1c18	n/a	n/a	1f40	1b40
data_list4_start	1c40	18b6	n/a	1fb9	n/a
data_a_code_start	2120	18e0	1840	5c20	1b90
data_messages_start	3120	2860	2eff	2083	34c0
data_common_word_fragments_start	6af1	70b7	710c	5a0b	70d7
data_checksum_start_page_msb	n/a	n/a	n/a	7326	7326
data_checksum_loop_counter_max	n/a	n/a	n/a	7327	7327
data_calculated_checksum	n/a	n/a	n/a	7328	7328
data_a_code_address_lsb	7323	7323	7323	7329	7329
data_a_code_address_msb	7324	7324	7324	732a	732a
data_variables_start_address_lsb	7327	7327	7327	732d	732d
data_variables_start_address_msb	7328	7328	7328	732e	732e
data_location_exits_address_lsb	7329	7329	7329	732f	732f
data_location_exits_address_msb	732a	732a	732a	7330	7330
data_messages_address_lsb	732b	732b	732b	7331	7331
data_messages_address_msb	732c	732c	732c	7332	7332
data_common_word_fragments_address_lsb	732d	732d	732d	7333	7333
data_common_word_fragments_address_msb	732e	732e	732e	7334	7334
data_inverse_directions_table	732f	732f	732f	7335	7335
data_list_location_lookup_table	7343	7343	7343	7349	7349
data_save_game_file_name	7468	7468	7468	746d	746d
data_power_of_ten_table	7b84	7b84	7b84	7bac	7baa
data_cmd_lookup_table	7b90	7b90	7b90	7bb8	7bb6

Command Handlers

The table below contains the memory address for the Command Handlers.

Label	Adventure Quest	Colossal Adventure	Dungeon Adventure	Lords of Time	Snowball
fn_cmd_printnumber	7472	7472	7472	7477	7477
fn_cmd_messagev	758e	758e	758e	7593	7593
fn_cmd_messagec	759f	759f	759f	75a4	75a4
fn_cmd_add_var1_to_var2	75a9	75a9	75a9	75ae	75ae
fn_cmd_subtract_var2_from_var1	75c3	75c3	75c3	75c8	75c8
fn_cmd_jump	75db	75db	75db	75e0	75e0
fn_cmd_intgosub	76a0	76a0	76a0	76a5	76a5
fn_cmd_intreturn	76c5	76c5	76c5	76ca	76ca
fn_cmd_set_variable_to_constant	772b	772b	772b	7738	7738
fn_cmd_copy_from_var1_to_var2	7746	7746	7746	7753	7753
fn_cmd_get_player_input	775b	775b	775b	7768	7768
fn_cmd_goto	78fb	78fb	78fb	790a	790a
fn_cmd_if_var1_equals_var2_then_goto	793a	793a	793a	7949	7949
fn_cmd_if_var1_does_not_equal_var2_then_goto	794b	794b	794b	795a	795a
fn_cmd_if_var1_less_than_var2_then_goto	7953	7953	7953	7962	7962
fn_cmd_if_var1_greater_than_var2_then_goto	795d	795d	795d	796c	796c
fn_cmd_if_var1_equals_constant_then_goto	7965	7965	7965	7974	7974
fn_cmd_if_var1_does_not_equal_constant_then_goto	796d	796d	796d	797c	797c
fn_cmd_if_var1_is_less_than_constant_then_goto	7975	7975	7975	7984	7984
fn_cmd_if_var1_is_greater_than_constant_then_goto	797f	797f	797f	798e	798e
fn_cmd_exit	79af	79af	79af	79be	79be
fn_cmd_function	7a67	7a67	7a67	7a76	7a76

List Handlers

The table below contains the memory address for the List Handlers.

Note that listcv1 is defaulted to in fn_list_handler so doeesn't have it's own label

Label	Adventure Quest	Colossal Adventure	Dungeon Adventure	Lords of Time	Snowball
fn_list_handler	7629	7629	7629	762e	762e
fn_list_handler_listvv	7641	7641	7641	7646	7646
fn_list_handler_listv1c	7655	7655	7655	765a	765a
fn_list_handler_listv1v	7661	7661	7661	7666	7666

Supporting Functions

The table below contains all the functions that support Command and List Handlers, including the game entry points of fn_game_entry_point and fn_other_entry_point.

Label	Adventure Quest	Colossal Adventure	Dungeon Adventure	Lords of Time	Snowball
start	1900	1100	1100	1200	1100
data_dictionary_start	1c58	1180	1100	1220	1180
data_exits_start	1920	1530	e20	1b00	1890
data_list1_start	1bd0	n/a	17b0	1e00	1af0
data_list2_start	n/a	1896	n/a	n/a	n/a
data_list3_start	1c18	n/a	n/a	1f40	1b40
data_list4_start	1c40	18b6	n/a	1fb9	n/a
data_a_code_start	2120	18e0	1840	5c20	1b90
data_messages_start	3120	2860	2eff	2083	34c0
data_common_word_fragments_start	6af1	70b7	710c	5a0b	70d7
main_common_source_code	7320	7320	7320	7320	7320
fn_game_entry_point	7320	7320	7320	7320	7320
fn_calc_checksum_byte	n/a	n/a	n/a	7323	7323
data_checksum_start_page_msb	n/a	n/a	n/a	7326	7326
data_checksum_loop_counter_max	n/a	n/a	n/a	7327	7327
data_calculated_checksum	n/a	n/a	n/a	7328	7328
data_a_code_address_lsb	7323	7323	7323	7329	7329
data_a_code_address_msb	7324	7324	7324	732a	732a
data_variables_start_address_lsb	7327	7327	7327	732d	732d
data_variables_start_address_msb	7328	7328	7328	732e	732e
data_location_exits_address_lsb	7329	7329	7329	732f	732f
data_location_exits_address_msb	732a	732a	732a	7330	7330
data_messages_address_lsb	732b	732b	732b	7331	7331
data_messages_address_msb	732c	732c	732c	7332	7332
data_common_word_fragments_address_lsb	732d	732d	732d	7333	7333
data_common_word_fragments_address_msb	732e	732e	732e	7334	7334
data_inverse_directions_table	732f	732f	732f	7335	7335
data_list_location_lookup_table	7343	7343	7343	7349	7349
fn_init_game	7351	7351	7351	7357	7357
jump_to_a_code_virtual_machine	7379	7379	7379	737f	737f
loop_a_code_virtual_machine	737c	737c	737c	7382	7382
fn_process_general_opcode	739d	739d	739d	73a3	73a3
fn_write_char_to_screen	73ac	73ac	73ac	73b2	73b2
no_carriage_return	73bc	73bc	73bc	73c2	73c2
print_char_or_space	73c8	73c8	73c8	73ce	73ce
end_write_char_to_screen	73cb	73cb	73cb	73d1	73d1
fn_generate_random_seed	73cc	73cc	73cc	73d2	73d2
fn_other_entry_point	7420	7420	7420	7425	7425
fn_save_game	7423	7423	7423	7428	7428
fn_load_game	742c	742c	742c	7431	7431
set_param_block_lsb_and_call_osfile	7433	7433	7433	7438	7438
fn_create_file_parameter_block	7439	7439	7439	743e	743e
data_save_game_file_name	7468	7468	7468	746d	746d
fn_cmd_printnumber	7472	7472	7472	7477	7477
fn_decode_encoded_string	7484	7484	7484	7489	7489
loop_check_and_add_char_to_string_buffer	748d	748d	748d	7492	7492
continue_with_encoded_string	749f	749f	749f	74a4	74a4
fn_process_embedded_encoded_string	74b4	74b4	74b4	74b9	74b9
fn_find_nth_game_description	74d0	74d0	74d0	74d5	74d5
fn_find_nth_common_word_fragment	74da	74da	74da	74df	74df
loop_find_nth_encoded_string	74da	74da	74da	74df	74df
check_current_encoded_string_byte	74e1	74e1	74e1	74e6	74e6
fn_check_char_and_add_to_string_buffer	7508	7508	7508	750d	750d
check_if_underscore	750e	750e	750e	7513	7513
check_if_carriage_return	7514	7514	7514	7519	7519
fn_write_char_to_string_and_move_to_next_char	751e	751e	751e	7523	7523
fn_move_to_next_char_memory_address	7522	7522	7522	7527	7527
fn_write_string_and_then_start_new_line	7530	7530	7530	7535	7535
fn_reset_next_char_pointer	7545	7545	7545	754a	754a
fn_check_string_fits_on_current_line	754e	754e	754e	7553	7553
reset_next_char_pointer_to_start	7568	7568	7568	756d	756d
fn_print_next_char	756b	756b	756b	7570	7570
fn_reset_next_char_ptr_and_write_space	757e	757e	757e	7583	7583
fn_cmd_messagev	758e	758e	758e	7593	7593
fn_cmd_messagec	759f	759f	759f	75a4	75a4
fn_cmd_add_var1_to_var2	75a9	75a9	75a9	75ae	75ae
fn_cmd_subtract_var2_from_var1	75c3	75c3	75c3	75c8	75c8
fn_cmd_jump	75db	75db	75db	75e0	75e0
set_jump_table_offset	75ec	75ec	75ec	75f1	75f1
fn_list_handler	7629	7629	7629	762e	762e
fn_list_handler_listvv	7641	7641	7641	7646	7646
fn_list_set_nth_list_entry_to_variable_value	764a	764a	764a	764f	764f
fn_list_handler_listv1c	7655	7655	7655	765a	765a
fn_list_handler_listv1v	7661	7661	7661	7666	7666
fn_list_get_nth_list_entry_and_set_variable	766a	766a	766a	766f	766f
fn_get_operand_variable_value	767a	767a	767a	767f	767f
fn_list_get_start_address	7685	7685	7685	768a	768a
fn_list_add_offset_to_list_start_address	7692	7692	7692	7697	7697
fn_cmd_intgosub	76a0	76a0	76a0	76a5	76a5
calc_a_code_return_address	76af	76af	76af	76b4	76b4
fn_cmd_intreturn	76c5	76c5	76c5	76ca	76ca
fn_get_next_a_code_byte	76d8	76d8	76d8	76dd	76dd
fn_get_jump_table_offset	76f0	76f0	76f0	76f5	76f5
fn_get_a_code_variable_number	76f0	76f0	76f0	76f5	76f5
get_variable_value	770b	770b	770b	7718	7718
fn_get_a_code_opcode_operands	7710	7710	7710	771d	771d
fn_get_a_code_opcode_operand_single_byte	7721	7721	7721	772e	772e
fn_cmd_set_variable_to_constant	772b	772b	772b	7738	7738
fn_set_constant_address_location	7734	7734	7734	7741	7741
fn_copy_memory_address_ptr	773d	773d	773d	774a	774a
fn_cmd_copy_from_var1_to_var2	7746	7746	7746	7753	7753
fn_copy_from_memory_to_memory	7749	7749	7749	7756	7756
fn_cmd_get_player_input	775b	775b	775b	7768	7768
fn_store_matched_cmds_and_objects	775e	775e	775e	776b	776b
fn_set_variable_value	7775	7775	7775	7784	7784
fn_get_and_parse_player_input	7784	7784	7784	7793	7793
count_next_word	77b4	77b4	77b4	77c3	77c3
loop_find_end_of_word	77bc	77bc	77bc	77cb	77cb
input_words_counted	77cd	77cd	77cd	77dc	77dc
compare_current_input_word	77d9	77d9	77d9	77e8	77e8
compare_next_dict_char_against_input_char	77e7	77e7	77e7	77f6	77f6
loop_until_end_of_dict_word	7818	7818	7818	7827	7827
fn_player_input_string_parsed	7830	7830	7830	783f	783f
fn_check_word_against_next_dict_entry	7833	7833	7833	7842	7842
fn_reset_dict_and_compare_next_word	7844	7844	7844	7853	7853
fn_find_next_dict_entry_and_compare	784a	784a	784a	7859	7859
loop_get_next_dict_chr	784b	784b	784b	785a	785a
fn_loop_to_end_of_current_input_word	786a	786a	786a	7879	7879
fn_end_cmd_or_obj_seq_and_process	7889	7889	7889	7898	7898
fn_cache_cmd_or_obj	7891	7891	7891	78a0	78a0
fn_find_next_non_space_in_input_string	78a3	78a3	78a3	78b2	78b2
loop_check_next_input_character	78a3	78a3	78a3	78b2	78b2
fn_inc_input_string_buffer_pointer	78b0	78b0	78b0	78bf	78bf
fn_inc_dictionary_or_exits_ptr	78be	78be	78be	78cd	78cd
fn_dec_input_string_buffer_pointer	78cc	78cc	78cc	78db	78db
fn_dec_exit_or_dictionary_pointer	78da	78da	78da	78e9	78e9
fn_get_input_character	78e8	78e8	78e8	78f7	78f7
fn_get_exits_or_dictionary_byte	78ed	78ed	78ed	78fc	78fc
fn_init_dictionary_pointer	78f2	78f2	78f2	7901	7901
fn_cmd_goto	78fb	78fb	78fb	790a	790a
single_byte_offset	7917	7917	7917	7926	7926
perform_goto_calc	792b	792b	792b	793a	793a
fn_cmd_if_var1_equals_var2_then_goto	793a	793a	793a	7949	7949
skip_over_operands	793f	793f	793f	794e	794e
only_one_operand	7948	7948	7948	7957	7957
fn_cmd_if_var1_does_not_equal_var2_then_goto	794b	794b	794b	795a	795a
fn_cmd_if_var1_less_than_var2_then_goto	7953	7953	7953	7962	7962
fn_cmd_if_var1_greater_than_var2_then_goto	795d	795d	795d	796c	796c
fn_cmd_if_var1_equals_constant_then_goto	7965	7965	7965	7974	7974
fn_cmd_if_var1_does_not_equal_constant_then_goto	796d	796d	796d	797c	797c
fn_cmd_if_var1_is_less_than_constant_then_goto	7975	7975	7975	7984	7984
fn_cmd_if_var1_is_greater_than_constant_then_goto	797f	797f	797f	798e	798e
fn_get_var1_and_var2_and_check_if_equal	7987	7987	7987	7996	7996
fn_get_var_and_constant_and_check_if_equal	7993	7993	7993	79a2	79a2
fn_check_if_equal	799f	799f	799f	79ae	79ae
return_check_if_equal	79ae	79ae	79ae	79bd	79bd
fn_cmd_exit	79af	79af	79af	79be	79be
fn_check_if_move_direction_allowed	79ca	79ca	79ca	79d9	79d9
loop_find_nth_location_exits_start	79d2	79d2	79d2	79e1	79e1
loop_check_location_exits_for_match	79e4	79e4	79e4	79f3	79f3
direction_did_not_match_player_direction	79fb	79fb	79fb	7a0a	7a0a
check_locations_for_inverse_direction	7a0b	7a0b	7a0b	7a1a	7a1a
loop_check_next_location_for_inverse_direction	7a19	7a19	7a19	7a28	7a28
exit_cannot_be_used_for_reverse_lookup	7a3e	7a3e	7a3e	7a4d	7a4d
to_location_did_not_match	7a3e	7a3e	7a3e	7a4d	7a4d
skip_inc_location_number	7a4a	7a4a	7a4a	7a59	7a59
fn_reset_exits_ptr	7a5c	7a5c	7a5c	7a6b	7a6b
fn_cmd_function	7a67	7a67	7a67	7a76	7a76
check_if_save_game	7a71	7a71	7a71	7a80	7a80
check_if_load_game	7a78	7a78	7a78	7a87	7a87
check_if_clear_variables	7a7f	7a7f	7a7f	7a8e	7a8e
fn_clear_variables	7a8a	7a8a	7a8a	7a99	7a99
loop_clear_var_memory	7a90	7a90	7a90	7a9d	7a9d
fn_clear_stack	7a97	7a97	7a97	7aa0	7aa0
fn_brkv_handler	7aa1	7aa1	7aa1	7aaa	7aaa
escape_pressed	7acd	7acd	7acd	7ac9	7ac9
end_brkv_handler	7af0	7af0	7af0	7aec	7aec
fn_read_player_input	7af3	7af3	7af3	7aef	7aef
end_read_player_input	7b1f	7b1f	7b1f	7b1b	7b1b
fn_get_data_checksum	n/a	n/a	n/a	7b1c	7b1c
loop_checksum_calc	n/a	n/a	n/a	7b2c	7b2a
fn_actually_printnumber	7b20	7b20	7b20	7b48	7b46
move_to_next_digit_pos_outer_loop	7b3c	7b3c	7b3c	7b64	7b62
subtraction_inner_loop	7b56	7b56	7b56	7b7e	7b7c
check_if_digit_found	7b70	7b70	7b70	7b98	7b96
print_zero	7b7e	7b7e	7b7e	7ba6	7ba4
print_number_complete	7b83	7b83	7b83	7bab	7ba9
data_power_of_ten_table	7b84	7b84	7b84	7bac	7baa
data_cmd_lookup_table	7b90	7b90	7b90	7bb8	7bb6
end	7c00	7c00	7c00	7bff	7bff