LPT: Function to read register in preparation for the WD76C10 rewrite.

src/include/86box/lpt.h

@@ -83,6 +83,8 @@ extern lpt_port_t lpt_ports[PARALLEL_MAX];
 extern void    lpt_write(uint16_t port, uint8_t val, void *priv);
 extern uint8_t lpt_read(uint16_t port, void *priv);
 
+extern uint8_t lpt_read_port(int port, uint16_t reg);
+
 extern uint8_t lpt_read_status(int port);
 extern void    lpt_irq(void *priv, int raise);
 

src/lpt.c

@@ -165,6 +165,15 @@ lpt_read(uint16_t port, void *priv)
     return ret;
 }
 
+uint8_t
+lpt_read_port(int port, uint16_t reg)
+{
+    lpt_port_t *dev = &(lpt_ports[port]);
+    uint8_t ret = lpt_read(reg, dev);
+
+    return ret;
+}
+
 uint8_t
 lpt_read_status(int port)
 {