From 098181cf785afd239edf251536e6347d23c74af0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vincent=20Rivi=C3=A8re?= <vincent.riviere@freesbee.fr>
Date: Mon, 22 Oct 2012 18:17:34 +0000
Subject: [PATCH] Added comments about pseudo-supervisor mode.

---
 BaS_GNU/sources/BaS.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/BaS_GNU/sources/BaS.c b/BaS_GNU/sources/BaS.c
index b5d596f..db87f0d 100644
--- a/BaS_GNU/sources/BaS.c
+++ b/BaS_GNU/sources/BaS.c
@@ -165,7 +165,10 @@ void BaS(void)
 	* (uint8_t *) 0xfffffa11 = 0;
 	__asm__ __volatile__("nop	\n\t" : : : "memory");
 
+	/* Test for pseudo-supervisor mode: DIP switch #6 down */
 	if (DIP_SWITCH & (1 << 7)) {
+		/* In this mode, the OS actually runs in user mode
+		 * and all the supervisor instructions are emulated. */
 		__asm__ __volatile__("move.w #0x0700,sr	\n\t" : : : "memory");
 	}
 	__asm__ __volatile__("jmp 0xe00030	\n\t" : : : "memory");