diff --git a/.build.yml b/.build.yml
index 1bd8d46..d6b0439 100644
--- a/.build.yml
+++ b/.build.yml
@@ -2,8 +2,14 @@ image: archlinux
 packages:
   - make
   - cmake
+  - mkrom
+  - patchrom
+  - genkfs
+  - mktiupgrade
+  - valgrind
 sources:
   - https://github.com/knightos/scas
+  - https://github.com/knightos/kernel
 environment:
   project: scas
 tasks:
@@ -13,3 +19,8 @@ tasks:
       cd build
       cmake -DCMAKE_BUILD_TYPE=Release ..
       make
+      cd ../../kernel
+      # Temporary: use scas PR
+      git checkout scas
+      mkdir bin/TI84pSE -p
+      make AS="valgrind --track-origins=yes --leak-check=full --error-exitcode=1 ../scas/build/scas"
diff --git a/.gitignore b/.gitignore
index f023399..8d1fb99 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,5 @@ test/
 build/
 .lvimrc
 tables/z80.c
+.ccls
+.ccls-cache
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 692aee5..d1d57b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,6 @@ cmake_minimum_required(VERSION 2.8.5)
 
 project(scas C)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -pedantic -std=c99 -D_XOPEN_SOURCE=700")
-set(CMAKE_C_FLAGS_DEVEL "-Werror -g -Og")
 
 if(WIN32)
     set(CMAKE_C_FLAGS "-Wl,--allow-multiple-definition")
diff --git a/assembler/assembler.c b/assembler/assembler.c
index 1502dbd..1f1ff39 100644
--- a/assembler/assembler.c
+++ b/assembler/assembler.c
@@ -172,9 +172,18 @@ int try_expand_macro(struct assembler_state *state, char **line) {
 	if (strstr(*line, "macro") == *line + 1) { // Cannot expand macros while defining them
 		return 0;
 	}
+	if (strstr(*line, "undefine") == *line + 1) { // Should not expand while removing
+		return 0;
+	}
 	if (strstr(*line, "ifdef") == *line + 1) { // Should not expand when testing for existence
 		return 0;
 	}
+	// Shouldn't expand macros in equates
+	if ((**line == '.' || **line == '#')) {
+		if (code_strstr(*line, ".equ") || code_strchr(*line, '=')) {
+			return 0;
+		}
+	}
 	int i;
 	for (i = 0; i < state->macros->length; i++) {
 		macro_t *macro = state->macros->items[i];
@@ -326,7 +335,7 @@ int try_add_label(struct assembler_state *state, char **line) {
 
 	/* Add label */
 	symbol_t *sym = malloc(sizeof(symbol_t));
-	sym->exported = 1; /* TODO: Support explicit export */
+	sym->exported = !scas_runtime.options.explicit_export;
 	sym->type = SYMBOL_LABEL;
 	sym->value = state->PC + scas_runtime.options.origin;
 	sym->defined_address = state->current_area->data_length;
@@ -433,7 +442,14 @@ int try_match_instruction(struct assembler_state *state, char **_line) {
 				transform_local_labels(expression, state->last_global_label);
 				const char *file_name = stack_peek(state->file_name_stack);
 				transform_relative_labels(expression, state->last_relative_label, file_name);
+				symbol_t sym_pc = {
+					.type = SYMBOL_LABEL,
+					.value = state->PC,
+					.name = "$"
+				};
+				list_add(state->equates, &sym_pc);
 				result = evaluate_expression(expression, state->equates, &error, &symbol);
+				state->equates->length -= 1;
 				if (error == EXPRESSION_BAD_SYMBOL) {
 					if (scas_runtime.options.explicit_import && strcmp(symbol, "$") != 0) {
 						unresolved_symbol_t *unresolved_sym = malloc(sizeof(unresolved_symbol_t));
@@ -605,8 +621,8 @@ object_t *assemble(FILE *file, const char *file_name, assembler_settings_t *sett
 		try_empty_line,
 		try_parse_inside_macro,
 		try_split_line,
-		try_expand_macro,
 		try_add_label,
+		try_expand_macro,
 		try_handle_directive,
 		try_match_instruction,
 	};
@@ -707,11 +723,7 @@ object_t *assemble(FILE *file, const char *file_name, assembler_settings_t *sett
 		macro_free(macro);
 	}
 	list_free(state.macros);
-	for (int i = 0; i < state.equates->length; i += 1) {
-		symbol_t *sym = (symbol_t*)state.equates->items[i];
-		free(sym->name);
-		free(sym);
-	}
+	// Equates are also added to an area's symbols list, so they're cleaned up there
 	list_free(state.equates);
 	stack_free(state.source_map_stack);
 	free(state.instruction_buffer);
diff --git a/assembler/directives.c b/assembler/directives.c
index 3eb3303..61aedfd 100644
--- a/assembler/directives.c
+++ b/assembler/directives.c
@@ -152,6 +152,7 @@ int handle_block(struct assembler_state *state, char **argv, int argc) {
 
 	if (error == EXPRESSION_BAD_SYMBOL) {
 		ERROR(ERROR_UNKNOWN_SYMBOL, state->column, symbol);
+		free_expression(expression);
 		return 1;
 	} 
 
@@ -167,6 +168,8 @@ int handle_block(struct assembler_state *state, char **argv, int argc) {
 			result = 0;
 		}
 	}
+	free(buffer);
+	free_expression(expression);
 	return 1;
 }
 
@@ -433,6 +436,8 @@ int handle_undef(struct assembler_state *state, char **argv, int argc) {
 		return 1;
 	}
 
+	scas_log(L_DEBUG, "Looking for %s", argv[0]);
+
 	int i;
 	for (i = 0; i < state->macros->length; i++) {
 		macro_t *m = state->macros->items[i];
@@ -610,11 +615,20 @@ static void printf_putc(char c) {
 	putchar(c);
 }
 
-int handle_printf(struct assembler_state *state, char **argv, int argc) {
+int handle_echo(struct assembler_state *state, char **argv, int argc) {
 	if (argc == 0) {
 		ERROR(ERROR_INVALID_DIRECTIVE, state->column, "echo expects 1+ arguments");
 		return 1;
 	}
+	(void)argv;
+	return 1;
+}
+
+int handle_printf(struct assembler_state *state, char **argv, int argc) {
+	if (argc == 0) {
+		ERROR(ERROR_INVALID_DIRECTIVE, state->column, "printf expects 1+ arguments");
+		return 1;
+	}
 	int len = strlen(argv[0]);
 	if (argv[0][0] != '"' || argv[0][len - 1] != '"') {
 		ERROR(ERROR_INVALID_DIRECTIVE, state->column, "unterminated string");
@@ -737,8 +751,19 @@ int handle_equ(struct assembler_state *state, char **argv, int argc) {
 		ERROR_NO_ARG(ERROR_INVALID_SYNTAX, state->column);
 		return 1;
 	} else {
+		transform_local_labels(expression, state->last_global_label);
+		int len = state->equates->length;
+		for (int i = 0; i < state->current_area->symbols->length; i += 1) {
+			list_add(state->equates, state->current_area->symbols->items[i]);
+		}
+		symbol_t sym_pc = {
+			.type = SYMBOL_LABEL,
+			.value = state->PC,
+			.name = "$"
+		};
+		list_add(state->equates, &sym_pc);
 		result = evaluate_expression(expression, state->equates, &error, &symbol);
-		free_expression(expression);
+		state->equates->length = len;
 	}
 	if (error == EXPRESSION_BAD_SYMBOL) {
 		ERROR(ERROR_UNKNOWN_SYMBOL, state->column, symbol);
@@ -752,8 +777,10 @@ int handle_equ(struct assembler_state *state, char **argv, int argc) {
 		sym->value = result;
 		sym->exported = 0;
 		list_add(state->equates, sym);
+		list_add(state->current_area->symbols, sym);
 		scas_log(L_DEBUG, "Added equate '%s' with value 0x%08X", sym->name, sym->value);
 	}
+	free_expression(expression);
 	return 1;
 }
 
@@ -1277,7 +1304,7 @@ struct directive directives[] = {
 	{ "dl", handle_dl, DELIM_COMMAS },
 	{ "ds", handle_block, DELIM_COMMAS },
 	{ "dw", handle_dw, DELIM_COMMAS },
-	//{ "echo", handle_echo, DELIM_COMMAS | DELIM_WHITESPACE },
+	{ "echo", handle_echo, DELIM_COMMAS | DELIM_WHITESPACE },
 	{ "elif", handle_elseif, 0 },
 	{ "else", handle_else, 0 },
 	{ "elseif", handle_elseif, 0 },
diff --git a/common/errors.c b/common/errors.c
index 42d388b..3d1900f 100644
--- a/common/errors.c
+++ b/common/errors.c
@@ -2,6 +2,7 @@
 #include "list.h"
 #include "log.h"
 #include "objects.h"
+#include <stdbool.h>
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
@@ -101,15 +102,14 @@ void add_warning(list_t *warnings, int code, size_t line_number,
 void add_error_from_map(list_t *errors, int code, list_t *maps, uint64_t address, ...) {
 	source_map_t *map;
 	source_map_entry_t *entry;
-	int found = 0;
-	int i;
-	for (i = 0; i < maps->length; ++i) {
+	bool found = false;
+	for (int i = 0; i < maps->length; ++i) {
 		map = maps->items[i];
 		int j;
 		for (j = 0; j < map->entries->length; ++j) {
 			entry = map->entries->items[j];
 			if (address >= entry->address && address < entry->address + entry->length) {
-				found = 1;
+				found = true;
 				break;
 			}
 		}
@@ -135,16 +135,25 @@ void add_error_from_map(list_t *errors, int code, list_t *maps, uint64_t address
 	va_end(args);
 
 	error->message = buf;
+	scas_log(L_ERROR, "Added error '%s' at:", buf);
 	if (found) {
 		error->line_number = entry->line_number;
 		error->file_name = strdup(map->file_name);
 		error->line = strdup(entry->source_code);
+		for (int i = 0; i < maps->length; ++i) {
+			map = maps->items[i];
+			for (int j = 0; j < map->entries->length; ++j) {
+				entry = map->entries->items[j];
+				if (address >= entry->address && address < entry->address + entry->length) {
+					scas_log(L_ERROR, "\t%s:%d:%d", map->file_name,
+							entry->line_number, error->column);
+				}
+			}
+		}
 	} else {
 		error->line_number = 0;
 		error->file_name = NULL;
 		error->line = NULL;
 	}
 	list_add(errors, error);
-	scas_log(L_ERROR, "Added error '%s' at %s:%d:%d", buf, error->file_name,
-			error->line_number, error->column);
 }
diff --git a/common/list.c b/common/list.c
index a7585a3..4ddc02f 100644
--- a/common/list.c
+++ b/common/list.c
@@ -49,12 +49,13 @@ void list_insert(list_t *list, int index, void *item) {
 
 void list_del(list_t *list, int index) {
 	list->length--;
-	memmove(&list->items[index], &list->items[index + 1], sizeof(void*) * (list->length - index));
+	if (index != list->length) {
+		memmove(&list->items[index], &list->items[index + 1], sizeof(void*) * (list->length - index));
+	}
 }
 
 void list_cat(list_t *list, list_t *source) {
-	int i;
-	for (i = 0; i < source->length; ++i) {
+	for (int i = 0; i < source->length; ++i) {
 		list_add(list, source->items[i]);
 	}
 }
diff --git a/include/assembler.h b/include/assembler.h
index ef761b0..046c2a1 100644
--- a/include/assembler.h
+++ b/include/assembler.h
@@ -50,6 +50,7 @@ struct assembler_state {
 
 object_t *assemble(FILE *file, const char *file_name, assembler_settings_t *settings);
 void transform_local_labels(tokenized_expression_t *expression, const char *last_global_label);
+void transform_relative_labels(tokenized_expression_t *expression, int last_relative_label, const char *const file_name);
 void macro_free(macro_t *macro);
 	
 #endif
diff --git a/linker/linker.c b/linker/linker.c
index acc0c77..b260b97 100644
--- a/linker/linker.c
+++ b/linker/linker.c
@@ -191,9 +191,8 @@ void link_objects(FILE *output, list_t *objects, linker_settings_t *settings) {
 	if (scas_runtime.options.remove_unused_functions) {
 		remove_unused_functions(merged);
 	}
-	int i;
 	uint64_t address = 0;
-	for (i = 0; i < merged->areas->length; ++i) {
+	for (int i = 0; i < merged->areas->length; ++i) {
 		area_t *area = merged->areas->items[i];
 		relocate_area(area, address, false);
 		if (settings->automatic_relocation) {
@@ -206,11 +205,11 @@ void link_objects(FILE *output, list_t *objects, linker_settings_t *settings) {
 		}
 		address += area->data_length;
 	}
-	for (i = 0; i < merged->areas->length; ++i) {
+	for (int i = 0; i < merged->areas->length; ++i) {
 		area_t *area = merged->areas->items[i];
 		gather_symbols(symbols, area, settings);
 	}
-	for (i = 0; i < merged->areas->length; ++i) {
+	for (int i = 0; i < merged->areas->length; ++i) {
 		area_t *area = merged->areas->items[i];
 		scas_log(L_INFO, "Linking area %s", area->name);
 		if (scas_runtime.options.origin) {
@@ -222,6 +221,20 @@ void link_objects(FILE *output, list_t *objects, linker_settings_t *settings) {
 	}
 	settings->write_output(output, final->data, (int)final->data_length);
 	scas_log(L_DEBUG, "Final binary written: %d bytes", ftell(output));
+
+	if (scas_runtime.symbol_file) {
+		scas_log(L_DEBUG, "Generating symbol file '%s'", scas_runtime.symbol_file);
+		FILE *symfile = fopen(scas_runtime.symbol_file, "w");
+		for (int i = 0; i < symbols->length; i++) {
+			symbol_t *symbol = symbols->items[i];
+			if (symbol->type == SYMBOL_LABEL && symbol->exported && !strchr(symbol->name, '@')) {
+				fprintf(symfile, ".equ %s 0x%lX\n", symbol->name, symbol->value);
+			}
+		}
+		fflush(symfile);
+		fclose(symfile);
+	}
+
 	object_free(merged);
 	area_free(final);
 	list_free(symbols);
diff --git a/scas/main.c b/scas/main.c
index c0dab1f..1aa3570 100644
--- a/scas/main.c
+++ b/scas/main.c
@@ -324,6 +324,7 @@ int main(int argc, char **argv) {
 		}
 		fclose(out);
 	}
+	
 	if (errors->length != 0) {
 		int i;
 		for (i = 0; i < errors->length; ++i) {