diff --git a/src/w83877tf.c b/src/w83877tf.c
index 6d86ad6..bc4dccc 100644
--- a/src/w83877tf.c
+++ b/src/w83877tf.c
@@ -235,14 +235,20 @@ static void w83877_common_init(int chip, uint16_t base, uint8_t key)
                 w83877tf_global.regs[0x16] = 0x04;
         else
                 w83877tf_global.regs[0x16] = 0x05;
-        w83877tf_global.regs[0x20] = 0xfc;
-        w83877tf_global.regs[0x23] = 0xde;
-        w83877tf_global.regs[0x24] = 0xfe;
-        w83877tf_global.regs[0x25] = 0xbe;
-        w83877tf_global.regs[0x26] = 0x23;
-        w83877tf_global.regs[0x27] = 0x05;
-        w83877tf_global.regs[0x28] = 0x43;
-        w83877tf_global.regs[0x29] = 0x60;
+        w83877tf_global.regs[0x20] = 0;
+        w83877tf_global.regs[0x23] = 0;
+        w83877tf_global.regs[0x24] = 0;
+        w83877tf_global.regs[0x25] = 0;
+        w83877tf_global.regs[0x26] = 0;
+        w83877tf_global.regs[0x27] = 0;
+        w83877tf_global.regs[0x28] = 0;
+        w83877tf_global.regs[0x29] = 0;
+
+        fdc_remove();
+        lpt1_remove();
+        lpt2_remove();
+        serial1_remove();
+        serial2_remove();
 
         w83877tf_global.chip = chip;
         w83877tf_global.unlock_key = key;