> compile NEMU

221220000 张三
Linux zzy 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
 23:08:12 up 2 days, 13:22,  1 user,  load average: 0.46, 0.58, 0.46

abstract-machine/am/src/platform/nemu/ioe/gpu.c

@@ -34,7 +34,7 @@ void __am_gpu_fbdraw(AM_GPU_FBDRAW_T *ctl) {
       outl(FB_ADDR + w * j + i, (uint32_t)ctl->pixels + w * j + i);
     }
   }
-  if (ctl->sync) {
+  if (ctl->sync && inl(SYNC_ADDR) == 0) {
     outl(SYNC_ADDR, 1);
   }
 }