diff --git a/drivers/video/bochs.c b/drivers/video/bochs.c
index 2d4526c7143..5923ff81c65 100644
--- a/drivers/video/bochs.c
+++ b/drivers/video/bochs.c
@@ -27,9 +27,9 @@ static int bochs_read(void *mmio, int index)
 	return readw(mmio + MMIO_BASE + index * 2);
 }
 
-static void bochs_vga_write(uint8_t val)
+static void bochs_vga_write(void *mmio, int index, uint8_t val)
 {
-	outb(val, VGA_ATT_W);
+	writeb(val, mmio + VGA_BASE + index);
 }
 
 static int bochs_init_fb(struct udevice *dev)
@@ -79,7 +79,7 @@ static int bochs_init_fb(struct udevice *dev)
 	bochs_write(mmio, INDEX_ENABLE, ENABLED | LFB_ENABLED);
 
 	/* disable blanking */
-	bochs_vga_write(VGA_AR_ENABLE_DISPLAY);
+	bochs_vga_write(mmio, VGA_ATT_W - VGA_INDEX, VGA_AR_ENABLE_DISPLAY);
 
 	plat->base = fb;
 
diff --git a/drivers/video/bochs.h b/drivers/video/bochs.h
index 71d3d60141e..3facf690e5d 100644
--- a/drivers/video/bochs.h
+++ b/drivers/video/bochs.h
@@ -11,9 +11,6 @@
 #define VGA_ATT_W		0x3c0
 #define VGA_AR_ENABLE_DISPLAY	0x20
 
-#define IOPORT_INDEX	0x01ce
-#define IOPORT_DATA	0x01cf
-
 enum {
 	INDEX_ID,
 	INDEX_XRES,
@@ -34,6 +31,7 @@ enum {
 #define LFB_ENABLED	BIT(6)
 #define NOCLEARMEM	BIT(7)
 
+#define VGA_BASE	0x400
 #define MMIO_BASE	0x500
 
 #endif