Monster patch to clean up a lot of cruft in the code, and reduce the RAM footptiny of a running XT machine from about 680MB down to about 80MB. Yes, 600MB of unused 0x00's.

src/bugger.c

@@ -44,7 +44,7 @@
  *		configuration register (CTRL_SPCFG bit set) but have to
  *		remember that stuff first...
  *
- * Version:	@(#)bugger.c	1.0.1	2018/02/14
+ * Version:	@(#)bugger.c	1.0.2	2018/03/15
  *
  * Author:	Fred N. van Kempen, <decwiz@yahoo.com>
  *
@@ -340,7 +340,7 @@ bug_read(uint16_t port, void *priv)
 
 /* Initialize the ISA BusBugger emulator. */
 static void *
-bug_init(device_t *info)
+bug_init(const device_t *info)
 {
     pclog("%s, I/O=%04x\n", info->name, BUGGER_ADDR);
 
@@ -351,7 +351,7 @@ bug_init(device_t *info)
 		  bug_read, NULL, NULL, bug_write, NULL, NULL,  NULL);
 
     /* Just so its not NULL. */
-    return(info);
+    return((void *)info);
 }
 
 
@@ -364,7 +364,7 @@ bug_close(UNUSED(void *priv))
 }
 
 
-device_t bugger_device = {
+const device_t bugger_device = {
     "ISA/PCI Bus Bugger",
     DEVICE_ISA | DEVICE_AT,
     0,