Applied all relevant PCem commits;

Extensively cleaned up and changed the CD-ROM code;
Removed CD-ROM IOCTTL (it was causing performance and stability issues);
Turned a lot of things into device_t's;
Added the PS/1 Model 2011 XTA and standalone XTA hard disk controllers, ported from Varcem;
Numerous FDC fixes for the PS/1 Model 2121;
NVR changes ported from Varcem;
The PCap code no longer requires libpcap to be compiled;
Numerous fixes to various SCSI controllers;
Updated NukedOPL to 1.8;
Fixes to OpenAL initialization and closing, should give less Audio issues now;
Revorked parts of the common (S)VGA code (also based on code from QEMU);
Removed the Removable SCSI hard disks (they were a never finished experiment so there was no need to keep them there);
Cleaned up the SCSI hard disk and Iomega ZIP code (but more cleanups of that are coming in the future);
In some occasions (IDE hard disks in multiple sector mode and SCSI hard disks) the status bar icon is no longer updated, should improve performance a bit;
Redid the way the tertiary and quaternary IDE controllers are configured (and they are now device_t's);
Extensively reworked the IDE code and fixed quite a few bugs;
Fixes to XT MFM, AT MFM, and AT ESDI code;
Some changes to XTIDE and MCA ESDI code;
Some fixes to the CD-ROM image handler.

src/cpu/x86_ops_amd.h

@@ -8,18 +8,20 @@
  *
  *		AMD SYSCALL and SYSRET CPU Instructions.
  *
- * Version:	@(#)x86_ops_amd.h	1.0.1	2018/01/01
+ * Version:	@(#)x86_ops_amd.h	1.0.2	2018/03/26
  *
  * Author:	Miran Grca, <mgrca8@gmail.com>
  *		Copyright 2016-2018 Miran Grca.
  */
 
+#ifndef internal_illegal
 static int internal_illegal(char *s)
 {
 	cpu_state.pc = cpu_state.oldpc;
 	x86gpf(s, 0);
 	return cpu_state.abrt;
 }
+#endif
 
 /*	0 = Limit 0-15
 	1 = Base 0-15