diff --git a/src/debugger/cli-debugger.c b/src/debugger/cli-debugger.c
index 62ec56e05..19ea63671 100644
--- a/src/debugger/cli-debugger.c
+++ b/src/debugger/cli-debugger.c
@@ -428,36 +428,49 @@ static uint32_t _performOperation(enum Operation operation, uint32_t current, ui
 	return current;
 }
 
-static uint32_t _lookupIdentifier(struct mDebugger* debugger, const char* name, struct CLIDebugVector* dv) {
+static void _lookupIdentifier(struct mDebugger* debugger, const char* name, struct CLIDebugVector* dv) {
 	struct CLIDebugger* cliDebugger = (struct CLIDebugger*) debugger;
 	if (cliDebugger->system) {
 		uint32_t value = cliDebugger->system->lookupPlatformIdentifier(cliDebugger->system, name, dv);
 		if (dv->type != CLIDV_ERROR_TYPE) {
-			return value;
+			dv->intValue = value;
+			return;
 		}
 		dv->type = CLIDV_INT_TYPE;
 		value = cliDebugger->system->lookupIdentifier(cliDebugger->system, name, dv);
 		if (dv->type != CLIDV_ERROR_TYPE) {
-			return value;
+			dv->intValue = value;
+			return;
 		}
 	}
 	dv->type = CLIDV_ERROR_TYPE;
-	return 0;
 }
 
-static uint32_t _evaluateParseTree(struct mDebugger* debugger, struct ParseTree* tree, struct CLIDebugVector* dv) {
+static void _evaluateParseTree(struct mDebugger* debugger, struct ParseTree* tree, struct CLIDebugVector* dv) {
+	int32_t lhs, rhs;
 	switch (tree->token.type) {
 	case TOKEN_UINT_TYPE:
-		return tree->token.uintValue;
+		dv->intValue = tree->token.uintValue;
+		break;
+	case TOKEN_SEGMENT_TYPE:
+		_evaluateParseTree(debugger, tree->lhs, dv);
+		dv->segmentValue = dv->intValue;
+		_evaluateParseTree(debugger, tree->rhs, dv);
+		break;
 	case TOKEN_OPERATOR_TYPE:
-		return _performOperation(tree->token.operatorValue, _evaluateParseTree(debugger, tree->lhs, dv), _evaluateParseTree(debugger, tree->rhs, dv), dv);
+		_evaluateParseTree(debugger, tree->lhs, dv);
+		lhs = dv->intValue;
+		_evaluateParseTree(debugger, tree->rhs, dv);
+		rhs = dv->intValue;
+		dv->intValue = _performOperation(tree->token.operatorValue, lhs, rhs, dv);
+		break;
 	case TOKEN_IDENTIFIER_TYPE:
-		return _lookupIdentifier(debugger, tree->token.identifierValue, dv);
+		_lookupIdentifier(debugger, tree->token.identifierValue, dv);
+		break;
 	case TOKEN_ERROR_TYPE:
 	default:
 		dv->type = CLIDV_ERROR_TYPE;
 	}
-	return 0;
 }
 
 struct CLIDebugVector* CLIDVParse(struct CLIDebugger* debugger, const char* string, size_t length) {
@@ -465,7 +478,7 @@ struct CLIDebugVector* CLIDVParse(struct CLIDebugger* debugger, const char* stri
 		return 0;
 	}
 
-	struct CLIDebugVector dvTemp = { .type = CLIDV_INT_TYPE };
+	struct CLIDebugVector dvTemp = { .type = CLIDV_INT_TYPE, .segmentValue = -1 };
 
 	struct LexVector lv = { .next = 0 };
 	size_t adjusted = lexExpression(&lv, string, length);
@@ -479,7 +492,7 @@ struct CLIDebugVector* CLIDVParse(struct CLIDebugger* debugger, const char* stri
 	if (tree.token.type == TOKEN_ERROR_TYPE) {
 		dvTemp.type = CLIDV_ERROR_TYPE;
 	} else {
-		dvTemp.intValue = _evaluateParseTree(&debugger->d, &tree, &dvTemp);
+		_evaluateParseTree(&debugger->d, &tree, &dvTemp);
 	}
 
 	parseFree(tree.lhs);
diff --git a/src/debugger/cli-debugger.h b/src/debugger/cli-debugger.h
index 3065ad490..daad59d11 100644
--- a/src/debugger/cli-debugger.h
+++ b/src/debugger/cli-debugger.h
@@ -20,11 +20,14 @@ struct CLIDebugVector {
 	enum CLIDVType {
 		CLIDV_ERROR_TYPE,
 		CLIDV_INT_TYPE,
-		CLIDV_CHAR_TYPE
+		CLIDV_CHAR_TYPE,
 	} type;
 	union {
-		int32_t intValue;
 		char* charValue;
+		struct {
+			int32_t intValue;
+			int segmentValue;
+		};
 	};
 };
 
diff --git a/src/debugger/parser.c b/src/debugger/parser.c
index 5d822598d..4d3cfd6b2 100644
--- a/src/debugger/parser.c
+++ b/src/debugger/parser.c
@@ -222,6 +222,17 @@ size_t lexExpression(struct LexVector* lv, const char* string, size_t length) {
 				lv = _lexOperator(lv, token);
 				state = LEX_ROOT;
 				break;
+			case ':':
+				lv->token.type = TOKEN_SEGMENT_TYPE;
+				lv->token.uintValue = next;
+				lvNext = malloc(sizeof(struct LexVector));
+				lvNext->next = lv->next;
+				lvNext->token.type = TOKEN_UINT_TYPE;
+				lv->next = lvNext;
+				lv = lvNext;
+				next = 0;
+				state = LEX_EXPECT_HEX;
+				break;
 			case ')':
 				lv->token.type = TOKEN_UINT_TYPE;
 				lv->token.uintValue = next;
@@ -355,6 +366,17 @@ static struct LexVector* _parseExpression(struct ParseTree* tree, struct LexVect
 				return 0;
 			}
 			break;
+		case TOKEN_SEGMENT_TYPE:
+			tree->lhs = _parseTreeCreate();
+			tree->lhs->token.type = TOKEN_UINT_TYPE;
+			tree->lhs->token.uintValue = lv->token.uintValue;
+			tree->rhs = _parseTreeCreate();
+			tree->token.type = TOKEN_SEGMENT_TYPE;
+			lv = _parseExpression(tree->rhs, lv->next, precedence, openParens);
+			if (tree->token.type == TOKEN_ERROR_TYPE) {
+				tree->token.type = TOKEN_ERROR_TYPE;
+			}
+			break;
 		case TOKEN_OPEN_PAREN_TYPE:
 			lv = _parseExpression(tree, lv->next, INT_MAX, openParens + 1);
 			break;
diff --git a/src/debugger/parser.h b/src/debugger/parser.h
index bc2cbfaf9..c68f08d9e 100644
--- a/src/debugger/parser.h
+++ b/src/debugger/parser.h
@@ -36,6 +36,7 @@ struct Token {
 		TOKEN_OPERATOR_TYPE,
 		TOKEN_OPEN_PAREN_TYPE,
 		TOKEN_CLOSE_PAREN_TYPE,
+		TOKEN_SEGMENT_TYPE,
 	} type;
 	union {
 		uint32_t uintValue;