diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index 610a2c4..067335d 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -1432,7 +1432,7 @@ HOLD			EQU #CB						; 
 ;#DF - vRAM page F for 512 kb (окно C000-FFFF)
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 vROM:					;
-.EXPANSION:		EQU #E0		; vROM page EXPANSION.		Port #1FFD bit1=1 (#24 bit6=0, bit0=0)
+.ZX_EXPANSION:		EQU #E0		; vROM page EXPANSION.		Port #1FFD bit1=1 (#24 bit6=0, bit0=0)
 .TR_DOS:		EQU #E1		; vROM page TR-DOS.		PC = #3D00..#3DFF and #1FFD bit1=0 (#24 bit0=0)
 .BASIC_128:		EQU #E2		; vROM page BASIC-128.		#7FFD bit4=0 and #1FFD bit1=0 (#24 bit0=0)
 .BASIC_48:		EQU #E3		; vROM page BASIC-48.		#7FFD bit4=1 and #1FFD bit1=0 (#24 bit0=0)
@@ -1441,10 +1441,10 @@ vROM:					;
 .TR_DOS_2:		EQU #E5		; vROM page TR-DOS 2.		PC = #3D00..#3DFF and #1FFD bit1=0 (#24 bit0=1)
 .BASIC_128_2:		EQU #E6		; vROM page BASIC-128 2.	#7FFD bit4=0 and #1FFD bit1=0 (#24 bit0=1)
 .BASIC_48_2:		EQU #E7		; vROM page BASIC-48 2.		#7FFD bit4=1 and #1FFD bit1=0 (#24 bit0=1)
-.BIOS_1			EQU #EB		; vROM page BIOS-3		Port #74 = 0
+.ZX_BIOS_1			EQU #EB		; vROM page BIOS-3		Port #74 = 0
 ;#EC - user's memory cell = FF						; сюда можно сохранить нужное значение ;?????
 ;#ED - user's memory cell = 00						; сюда можно сохранить нужное значение ;?????
-.BIOS_2			EQU #EF		; vROM page BIOS-4		Port #74 = 1
+.ZX_BIOS_2			EQU #EF		; vROM page BIOS-4		Port #74 = 1
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 SLOT0			EQU #E8						; RAM page (окно 0000-3FFF)
 SLOT1			EQU #E9						; RAM page (окно 4000-7FFF)