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In some occasions (IDE hard disks in multiple sector mode and SCSI hard disks) the status bar icon is no longer updated, should improve performance a bit;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/machine/machine.c

@@ -8,7 +8,7 @@
  *
  *		Handling of the emulated machines.
  *
- * Version:	@(#)machine.c	1.0.32	2018/03/19
+ * Version:	@(#)machine.c	1.0.33	2018/03/26
  *
  * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
  *		Miran Grca, <mgrca8@gmail.com>
@@ -31,8 +31,7 @@
 #include "../rom.h"
 #include "../lpt.h"
 #include "../serial.h"
-#include "../disk/hdc.h"
-#include "../disk/hdc_ide.h"
+#include "../cpu/cpu.h"
 #include "machine.h"
 
 
@@ -46,8 +45,6 @@ machine_init(void)
 {
     pclog("Initializing as \"%s\"\n", machine_getname());
 
-    ide_set_bus_master(NULL, NULL, NULL);
-
     /* Set up the architecture flags. */
     AT = IS_ARCH(machine, MACHINE_AT);
     PCI = IS_ARCH(machine, MACHINE_PCI);
@@ -68,10 +65,16 @@ void
 machine_common_init(const machine_t *model)
 {
     /* System devices first. */
-    dma_init();
     pic_init();
+    dma_init();
     pit_init();
 
+    cpu_set();
+    if (AT)
+	setrtcconst(machines[machine].cpu[cpu_manufacturer].cpus[cpu_effective].rspeed);
+    else
+	setrtcconst(14318184.0);
+
     if (lpt_enabled)
 	lpt_init();