diff --git a/trunk/bootrom/include/app/hw/ARM9/mmap_app.h b/trunk/bootrom/include/app/hw/ARM9/mmap_app.h
index d4a181d..379fa19 100644
--- a/trunk/bootrom/include/app/hw/ARM9/mmap_app.h
+++ b/trunk/bootrom/include/app/hw/ARM9/mmap_app.h
@@ -27,7 +27,7 @@ extern "C" {
 //------------------------------------- APP
 #define HW_APP                          HW_PRV_WRAM_SYSRV_END
 #define HW_APP_END                      (HW_APP + HW_APP_SIZE)
-#define HW_APP_SIZE                     (HW_PRV_WRAM_SIZE - HW_PRV_WRAM_SYSRV_SIZE)
+#define HW_APP_SIZE                     (HW_PRV_WRAM_SIZE - HW_PRV_WRAM_SYSRV_SIZE)  // 先頭領域のみ予約、スタックはDTCM上
 
 
 #ifdef __cplusplus
diff --git a/trunk/firmware/include/firm/hw/ARM9/mmap_firm.h b/trunk/firmware/include/firm/hw/ARM9/mmap_firm.h
index 2d512f5..7482f89 100644
--- a/trunk/firmware/include/firm/hw/ARM9/mmap_firm.h
+++ b/trunk/firmware/include/firm/hw/ARM9/mmap_firm.h
@@ -26,7 +26,7 @@ extern "C" {
 //------------------------------------- FIRM
 #define HW_FIRM                         HW_PRV_WRAM_SYSRV_END
 #define HW_FIRM_END                     (HW_FIRM + HW_FIRM_SIZE)
-#define HW_FIRM_SIZE                    (HW_PRV_WRAM_SIZE - HW_PRV_WRAM_SYSRV_SIZE)
+#define HW_FIRM_SIZE                    (HW_PRV_WRAM_SIZE - HW_PRV_WRAM_SYSRV_SIZE)  // 先頭領域のみ予約、スタックはDTCM上
 
 #ifdef __cplusplus
 } /* extern "C" */