From 87c35f8f19aa0545a1e78a81020b9c105e76e87d Mon Sep 17 00:00:00 2001
From: Yanyan Jiang <jiangyy@outlook.com>
Date: Mon, 8 Feb 2021 15:28:55 +0000
Subject: [PATCH] fix mmc multi def bug

---
 kernels/litenes/src/mmc.c | 1 +
 kernels/litenes/src/mmc.h | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernels/litenes/src/mmc.c b/kernels/litenes/src/mmc.c
index 4fda05c..b60f2e7 100644
--- a/kernels/litenes/src/mmc.c
+++ b/kernels/litenes/src/mmc.c
@@ -2,6 +2,7 @@
 #include "ppu.h"
 #include <klib.h>
 
+byte mmc_id;
 #define MMC_MAX_PAGE_COUNT 1
 
 static byte mmc_chr_pages[MMC_MAX_PAGE_COUNT][0x2000];
diff --git a/kernels/litenes/src/mmc.h b/kernels/litenes/src/mmc.h
index 5ec8fae..3376ce1 100644
--- a/kernels/litenes/src/mmc.h
+++ b/kernels/litenes/src/mmc.h
@@ -1,8 +1,8 @@
 #include "common.h"
 
-byte mmc_id;
+extern byte mmc_id;
 
 byte mmc_read(word address);
 void mmc_write(word address, byte data);
 void mmc_copy(word address, byte *source, int length);
-void mmc_append_chr_rom_page(byte *source);
\ No newline at end of file
+void mmc_append_chr_rom_page(byte *source);