X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=ncpu.h;h=301e9a05dbacff0ca46892790f3af68c1b51038f;hp=015320a115dfee98044ff8acc14ebf06a9453f8c;hb=HEAD;hpb=af32b6c2f0ed2f1a4582c3e8d7ac704b9c61fa4c

diff --git a/ncpu.h b/ncpu.h
index 015320a..301e9a0 100644
--- a/ncpu.h
+++ b/ncpu.h
@@ -37,7 +37,7 @@
 #define REG_P_REST r8
 #define REG_NZ  r9		// 14
 #define REG_ADDR r10		// 18
-#define REG_CYCLE r11		// 1c
+#define REG_CYCLE r11		// 1c [31:16] - fceu cycles, [15:8] - fceu irqhook cycles, [7:0] - fceu timestamp cycles
 #define REG_OP_TABLE r12	// 20
 
 
@@ -76,9 +76,10 @@
  * ++++++++---S ¥¹¥¿¥Ã¥¯¥Ý¥¤¥ó¥¿
  *
  * note: fceu uses this differently
- * [7:0]   - interrupt flags (same as above)
+ * [7:0]   - flags (same as above)
  * [15:8]  - FCEU IRQ pending sources
- * [23:16] - unused
+ * [16]    - a flag which indicates that MapIRQHook is not null
+ * [23:17] - unused
  * [31:24] - stack pointer
  */