From: Ben Pfaff <blp@cs.stanford.edu>
Date: Mon, 27 Sep 2004 16:54:46 +0000 (+0000)
Subject: Comments.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=commitdiff_plain;h=34faba4d412c8d856d8d26dc9d82c0cf5b906d3c

Comments.
---

diff --git a/src/devices/disk.c b/src/devices/disk.c
index baf1208..a3f26cf 100644
--- a/src/devices/disk.c
+++ b/src/devices/disk.c
@@ -8,6 +8,9 @@
 #include "threads/interrupt.h"
 #include "threads/synch.h"
 
+/* The code in this file is an interface to an ATA (IDE)
+   controller.  It attempts to comply to [ATA-3]. */
+
 /* ATA command block port addresses. */
 #define reg_data(CHANNEL) ((CHANNEL)->reg_base + 0)     /* Data. */
 #define reg_error(CHANNEL) ((CHANNEL)->reg_base + 1)    /* Error. */
diff --git a/src/devices/serial.c b/src/devices/serial.c
index 1d0607b..8dc7f18 100644
--- a/src/devices/serial.c
+++ b/src/devices/serial.c
@@ -9,7 +9,9 @@
 
 /* Register definitions for the 16550A UART used in PCs.
    The 16550A has a lot more going on than shown here, but this
-   is all we need. */
+   is all we need.
+
+   Refer to [PC16650D] for hardware information. */
 
 /* I/O port base address for the first serial port. */
 #define IO_BASE 0x3f8