diff --git a/constants/BIOS_equ.inc b/constants/BIOS_equ.inc
index 7bfd01e..39524b7 100644
--- a/constants/BIOS_equ.inc
+++ b/constants/BIOS_equ.inc
@@ -152,7 +152,7 @@ REINIT			EQU	#FD		;[x] restart, soft/hard reset, reinit RAM ID for spectrum page
 
 ;
 ;----------------[ EROOR CODES ]----------------;
-Error:
+Error:						;
 .NoErrors		EQU	0		;
 .InvalidSubFunction	EQU	1		;
 .BadNumber		EQU	2		; of drive or ramblock
@@ -166,6 +166,9 @@ Error:
 .Write			EQU	10		;
 .Failure		EQU	11		;
 .Busy			EQU	12		; DEVICE OPENED
+.NotSupported		EQU	#AA		;
+Errors.EMM:					;
+.NoMemory		EQU	1		;
 ;-----------------------------------------------;
 
 ; .NO_ERROR               EQU #00    ; 00 - NO ERRORS