From be34e9d396031bcd1268ac59e751189f4f6f850d Mon Sep 17 00:00:00 2001
From: b1ackmai1er <difficultylevelhigh@gmail.com>
Date: Wed, 12 May 2021 12:48:47 +0800
Subject: [PATCH] Add DS1307 to architecture document

Align hbios.inc RTC clock codes to match architecture document
---
 Source/Doc/Architecture.md | 1 +
 Source/HBIOS/hbios.inc     | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Source/Doc/Architecture.md b/Source/Doc/Architecture.md
index d70b32ab..4781b2bf 100644
--- a/Source/Doc/Architecture.md
+++ b/Source/Doc/Architecture.md
@@ -984,6 +984,7 @@ etc.) which is identified by a device type id from the table below.
 0x10        | BQ4845P
 0x20        | SIMH
 0x30        | System Periodic Timer
+0x40        | DS1307 (I2C)
 
 `\clearpage`{=latex}
 
diff --git a/Source/HBIOS/hbios.inc b/Source/HBIOS/hbios.inc
index bed737e0..b52536d8 100644
--- a/Source/HBIOS/hbios.inc
+++ b/Source/HBIOS/hbios.inc
@@ -188,9 +188,9 @@ DIODEV_HDSK	.EQU	$90
 ;
 RTCDEV_DS	.EQU	$00		; DS1302
 RTCDEV_BQ	.EQU	$10		; BQ4845P
-RTCDEV_SIMH	.EQU	$30		; SIMH
-RTCDEV_INT	.EQU	$40		; PERIODIC INT TIMER
-RTCDEV_DS7	.EQU	$50		; DS1302 (I2C)
+RTCDEV_SIMH	.EQU	$20		; SIMH
+RTCDEV_INT	.EQU	$30		; PERIODIC INT TIMER
+RTCDEV_DS7	.EQU	$40		; DS1302 (I2C)
 ;
 ; VIDEO DEVICE IDS
 ;