diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index 85fd188..2caa3a0 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -1860,9 +1860,10 @@ Drive:
 .Slave			EQU	%1011'0000
 
 ATAPI:
-.Packet				EQU #A0
-.IdentifyPackedDevice		EQU #A1
-.Reset				EQU #08
+.Nop			EQU #00
+.Reset			EQU #08
+.Packet			EQU #A0
+.IdentifyPackedDevice	EQU #A1
 ;
 ATA:
 ; ATA-2 commands ************************
@@ -1905,8 +1906,8 @@ ATA:
 .ReadMultiple			EQU #c4
 .Recalibrate			EQU #10
 .SetFeatures			EQU #ef
-.SetFeatures.Disable8bit		EQU #81	; Disable 8-bit data transfers (ฏจแ โ์ ข .Features)
-.SetFeatures.DisableWriteCache		EQU #82 ; Disable write cache (ฏจแ โ์ ข .Features)
+.SetFeatures.Disable8bit	EQU #81	; Disable 8-bit data transfers (ฏจแ โ์ ข .Features)
+.SetFeatures.DisableWriteCache	EQU #82 ; Disable write cache (ฏจแ โ์ ข .Features)
 .SetMultipleMode		EQU #c6
 .WriteBuffer			EQU #e8
 .WriteDMA			EQU #ca
@@ -1973,6 +1974,23 @@ ATA:
 ; บ คซ๏ ง ฏจแจ แฅชโฎเ  ข HDD                                      บ
 ; บ                                                               บ
 ; ศอออออออออออออออออออออออออออออออออออออออออออออออออออออออออออออออผ
+
+; ŠŽ„› Ž˜ˆŽŠ, ‚Ž‡‚€™€…Œ›… „ˆ‘ŠŽ‚Ž‰ ‘ˆ‘’…ŒŽ‰
+;	#08	;Ž˜ˆŠ€ €„…‘€–ˆˆ
+;	#09	;Š€€‹ … ˆ‘Ž…„ˆ…
+;	#40	;Ž˜ˆŠ€ €€€’“›
+;	#41     ;…‘ŽŽ’‚…’‘’‚ˆ… „€‰‚…€ €€€’“…
+;	#50	;…„Ž“‘’ˆŒ›‰ ŽŒ… „€‰‚…€ ‚ Š€€‹…
+;	#51	;„€‰‚… Ž’‘“’‘’‚“…’
+;	#52	;‡€…™…€Ÿ ŠŽŒ€„€
+;	#53	;Ž˜ˆŠ€ ‚‚Ž„€/‚›‚Ž„€
+;	#54	;‡€™ˆ’€ Ž’ ‡€ˆ‘ˆ
+;	#56	;… Ž€Ž’€€Ÿ ”€’€‹œ€Ÿ Ž˜ˆŠ€
+;	#59	;…’ ƒŽ’Ž‚Ž‘’ˆ €€€’“› (TIMEOUT)
+;	#81	;‘…Š’Ž … €‰„…
+;	#82	;€„…‘›‰ Œ€Š… … €‰„…
+;	#83	;OVERRUN
+;	#84     ;Ž˜ˆŠ€ ‚ CRC
  ENDMODULE
 ;-----------------------------------------------------------------------