diff --git a/sdk/xtdk/amd64/hltypes.h b/sdk/xtdk/amd64/hltypes.h
index c87bdbb..e50334b 100644
--- a/sdk/xtdk/amd64/hltypes.h
+++ b/sdk/xtdk/amd64/hltypes.h
@@ -64,19 +64,6 @@
 #define PIC2_DATA_PORT                                  0xA1
 #define PIC2_ELCR_PORT                                  0x04D1
 
-/* 8259 PIC commands */
-#define PIC_ICW1_ICW4				0x01 /* Indicates that ICW4 will be present */
-#define PIC_ICW1_SINGLE				0x02 /* Single (cascade) mode */
-#define PIC_ICW1_INTERVAL4			0x04 /* Call address interva l 4 (8) */
-#define PIC_ICW1_LEVEL				0x08 /* Level triggered (edge) mode */
-#define PIC_ICW1_INIT				0x10 /* Initialization - required! */
- 
-#define PIC_ICW4_8086				0x01 /* 8086/88 (MCS-80/85) mode */
-#define PIC_ICW4_AUTO				0x02 /* Auto (normal) EOI */
-#define PIC_ICW4_BUF_MASTER			0x0C /* Buffered mode/master */
-#define PIC_ICW4_BUF_SLAVE			0x08 /* Buffered mode/slave */
-#define PIC_ICW4_SFNM				0x10 /* Special fully nested (not) */
-
 /* PIC vector definitions */
 #define PIC1_VECTOR_SPURIOUS                            0x37
 
diff --git a/sdk/xtdk/i686/hltypes.h b/sdk/xtdk/i686/hltypes.h
index 7f02bdc..322e9c9 100644
--- a/sdk/xtdk/i686/hltypes.h
+++ b/sdk/xtdk/i686/hltypes.h
@@ -69,19 +69,6 @@
 #define PIC2_DATA_PORT                                  0xA1
 #define PIC2_ELCR_PORT                                  0x04D1
 
-/* 8259 PIC commands */
-#define PIC_ICW1_ICW4				0x01 /* Indicates that ICW4 will be present */
-#define PIC_ICW1_SINGLE				0x02 /* Single (cascade) mode */
-#define PIC_ICW1_INTERVAL4			0x04 /* Call address interva l 4 (8) */
-#define PIC_ICW1_LEVEL				0x08 /* Level triggered (edge) mode */
-#define PIC_ICW1_INIT				0x10 /* Initialization - required! */
- 
-#define PIC_ICW4_8086				0x01 /* 8086/88 (MCS-80/85) mode */
-#define PIC_ICW4_AUTO				0x02 /* Auto (normal) EOI */
-#define PIC_ICW4_BUF_MASTER			0x0C /* Buffered mode/master */
-#define PIC_ICW4_BUF_SLAVE			0x08 /* Buffered mode/slave */
-#define PIC_ICW4_SFNM				0x10 /* Special fully nested (not) */
-
 /* PIC vector definitions */
 #define PIC1_VECTOR_SPURIOUS                            0x37