diff --git a/Project/Src/NES/nes_main.c b/Project/Src/NES/nes_main.c
index 3b5907e..438354d 100644
--- a/Project/Src/NES/nes_main.c
+++ b/Project/Src/NES/nes_main.c
@@ -207,7 +207,7 @@ uint8_t nes_sram_malloc(uint32_t romsize) {
 
   // NES_RAM需要0x800大小的内存，这里多申请0x400的内存，用于1024字节对齐
   nes_ram_alignment = mymalloc(0x800 + 0x400);
-  NES_RAM = (void *)(((uint32_t)nes_ram_alignment + 0x400) & 0xfffffc00);
+  NES_RAM = (void *)(((uint32_t)nes_ram_alignment + 0x3FF) & 0xfffffc00);
 
   NES_SRAM = mymalloc(0X2000);
   RomHeader = mymalloc(sizeof(NES_header));