Split the 286/386 interpreter away from the 486+ one (the 286/386 interpreter does not use the pccache's, readlookup's, and writelookup's as the emulated CPU's are too slow for them to be required, and also has more accurate FPU timings), also added a LPT status read function for future-proofing.

src/lpt.c

@@ -165,6 +165,20 @@ lpt_read(uint16_t port, void *priv)
     return ret;
 }
 
+uint8_t
+lpt_read_status(int port)
+{
+    lpt_port_t *dev = &(lpt_ports[port]);
+    uint8_t ret = 0xff;
+
+    if (dev->dt && dev->dt->read_status && dev->priv)
+        ret = dev->dt->read_status(dev->priv) | 0x07;
+    else
+        ret = 0xdf;
+
+    return ret;
+}
+
 void
 lpt_irq(void *priv, int raise)
 {