diff --git a/code/duffle/bios.h b/code/duffle/bios.h
new file mode 100644
index 0000000..1946132
--- /dev/null
+++ b/code/duffle/bios.h
@@ -0,0 +1,14 @@
+#ifdef INTELLISENSE_DIRECTIVES
+#	pragma once
+#endif
+enum {
+	bios_init_pad_2  = 0x12,
+	bios_start_pad_2 = 0x13,
+	bios_flushcache  = 0x44,
+	bios_table_addr  = 0xA0,
+	bios_btable_addr = 0xB0,
+};
+
+enum {
+	bios_pad_buffer_size = 0x22,
+};
diff --git a/code/duffle/dsl.h b/code/duffle/dsl.h
index 1ed754b..f01b0a6 100644
--- a/code/duffle/dsl.h
+++ b/code/duffle/dsl.h
@@ -28,8 +28,9 @@
 #define internal static // internal
 
 #define asm           __asm__
-#define align_(value) __attribute__((aligned (value)))             // for easy alignment
 
+#define A_(data)      (& data)
+#define align_(value) __attribute__((aligned (value)))             // for easy alignment
 #define align_(value) __attribute__((aligned (value)))             // for easy alignment
 #define C_(type,data) ((type)(data))                               // for enforced precedence
 #define expect_(x, y) __builtin_expect(x, y)                       // so compiler knows the common path
diff --git a/code/duffle/gen/macs.h b/code/duffle/gen/macs.h
index cfdfa9e..e2c9069 100644
--- a/code/duffle/gen/macs.h
+++ b/code/duffle/gen/macs.h
@@ -14,6 +14,7 @@
 //   source: C:\projects\Pikuma\ps1\code\duffle\pad.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\dsl.atom.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\lottes_tape.h
+//   source: C:\projects\Pikuma\ps1\code\duffle\bios.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\psyq.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\math.atom.c
 //   source: C:\projects\Pikuma\ps1\code\duffle\mips.atom.c
diff --git a/code/duffle/gen/offsets.h b/code/duffle/gen/offsets.h
index 991cddf..4417594 100644
--- a/code/duffle/gen/offsets.h
+++ b/code/duffle/gen/offsets.h
@@ -11,6 +11,7 @@
 //   source: C:\projects\Pikuma\ps1\code\duffle\pad.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\dsl.atom.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\lottes_tape.h
+//   source: C:\projects\Pikuma\ps1\code\duffle\bios.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\psyq.h
 //   source: C:\projects\Pikuma\ps1\code\duffle\math.atom.c
 //   source: C:\projects\Pikuma\ps1\code\duffle\mips.atom.c
diff --git a/code/duffle/mips.atom.c b/code/duffle/mips.atom.c
index d7bfc89..e50f79d 100644
--- a/code/duffle/mips.atom.c
+++ b/code/duffle/mips.atom.c
@@ -1,6 +1,7 @@
 #ifdef INTELLISENSE_DIRECTIVES
 #	include "gen/macs.h"
 #	include "gen/offsets.h"
+#	include "bios.h"
 #	include "lottes_tape.h"
 #endif
 
@@ -8,11 +9,6 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(mips_atom_c);
 
 #pragma region Baked Atoms
 
-enum {
-	bios_flushcache = 0x44,
-	bios_table_addr = 0xA0,
-};
-
 /* Flushes the Instruction Cache (PSX A-function 0x44 via BIOS stub at 0xA0).
  * Sequence (per MIPS ABI; arguments in arg registers, RA pushed to stack):
  *   1. sp -= 8;  sw $ra, 4($sp)        ; save RA
diff --git a/code/hello_camera/hello_camera.c b/code/hello_camera/hello_camera.c
index ebbdaa0..b2ed29b 100644
--- a/code/hello_camera/hello_camera.c
+++ b/code/hello_camera/hello_camera.c
@@ -26,6 +26,7 @@
 #include "duffle/dsl.atom.h"
 #include "duffle/lottes_tape.h"
 
+#include "duffle/bios.h"
 #include "duffle/psyq.h"
 #pragma endregion Duffle Headers
 
@@ -115,10 +116,10 @@ NI_ void pad_bios_init_start(PadBiosRaw* raw0, PadBiosRaw* raw1)
 	asm volatile(
 		asm_words(
 			or_u(    rarg_2, rarg_1, rdiscard), /* $a2 = $a1 = raw1 */
-			add_ui(  rarg_1, rdiscard, 0x22),   /* $a1 = 0x22 */
-			add_ui(  rarg_3, rdiscard, 0x22),   /* $a3 = 0x22 */
-			add_ui(  rtmp_1, rdiscard, 0x12),   /* $t1 = 0x12 */
-			add_ui(  rtmp_2, rdiscard, 0xB0),   /* $t2 = 0xB0 */
+			add_ui(  rarg_1, rdiscard, bios_pad_buffer_size), /* $a1 = 0x22 */
+			add_ui(  rarg_3, rdiscard, bios_pad_buffer_size), /* $a3 = 0x22 */
+			add_ui(  rtmp_1, rdiscard, bios_init_pad_2),      /* $t1 = 0x12 */
+			add_ui(  rtmp_2, rdiscard, bios_btable_addr),     /* $t2 = 0xB0 */
 			call_reg(rtmp_2),                   /* jalr $t2, $ra */
 			nop                                 /* BD slot */
 		)
@@ -140,8 +141,8 @@ NI_ void pad_bios_init_start(PadBiosRaw* raw0, PadBiosRaw* raw1)
 	/* B(13h) StartPAD2() — no args. The BIOS preserves $sp. */
 	asm volatile(
 		asm_words(
-			add_ui(  rtmp_1, rdiscard, 0x13), /* $t1 = 0x13 */
-			add_ui(  rtmp_2, rdiscard, 0xB0), /* $t2 = 0xB0 (re-load) */
+			add_ui(  rtmp_1, rdiscard, bios_start_pad_2), /* $t1 = 0x13 */
+			add_ui(  rtmp_2, rdiscard, bios_btable_addr), /* $t2 = 0xB0 (re-load) */
 			call_reg(rtmp_2),                 /* jalr $t2, $ra */
 			nop                               /* BD slot */
 		)