diff --git a/nemu/src/device/audio.c b/nemu/src/device/audio.c
index daf83f6..cd9fbc5 100644
--- a/nemu/src/device/audio.c
+++ b/nemu/src/device/audio.c
@@ -30,16 +30,26 @@ enum {
 static uint8_t *sbuf = NULL;
 static uint32_t *audio_base = NULL;
 
+// static void init_sdl_audio() {
+//   SDL_AudioSpec s = {};
+//   s.format = AUDIO_S16SYS;  // 假设系统中音频数据的格式总是使用16位有符号数来表示
+//   s.userdata = NULL;        // 不使用
+
+//   SDL_InitSubSystem(SDL_INIT_AUDIO);
+//   SDL_OpenAudio(&s, NULL);
+//   SDL_PauseAudio(0);
+// }
+
 static void audio_io_handler(uint32_t offset, int len, bool is_write) {
+
 }
 
 void init_audio() {
-  uint32_t space_size = sizeof(uint32_t) * nr_reg;
-  audio_base = (uint32_t *)new_space(space_size);
+  audio_base = (uint32_t *)new_space(24);
 #ifdef CONFIG_HAS_PORT_IO
-  add_pio_map ("audio", CONFIG_AUDIO_CTL_PORT, audio_base, space_size, audio_io_handler);
+  add_pio_map ("audio", CONFIG_AUDIO_CTL_PORT, audio_base, 24, audio_io_handler);
 #else
-  add_mmio_map("audio", CONFIG_AUDIO_CTL_MMIO, audio_base, space_size, audio_io_handler);
+  add_mmio_map("audio", CONFIG_AUDIO_CTL_MMIO, audio_base, 24, audio_io_handler);
 #endif
 
   sbuf = (uint8_t *)new_space(CONFIG_SB_SIZE);