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-rw-r--r--hw/vga.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/vga.c b/hw/vga.c
index c3aa93f424..ac97081613 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -494,6 +494,8 @@ static uint32_t vga_mem_readb(uint32_t addr)
default:
case 3:
addr -= 0xb8000;
+ if (addr >= 0x8000)
+ return 0xff;
break;
}
@@ -570,6 +572,8 @@ void vga_mem_writeb(uint32_t addr, uint32_t val)
default:
case 3:
addr -= 0xb8000;
+ if (addr >= 0x8000)
+ return;
break;
}