Added the NCR 53C810 PCI SCSI controller;

Fixed the behavior of the CD-ROM GET CONFIGURATION command when unimplemented features are requested;
Fixed the behavior of the CD-ROM READ DVD STRUCTURE command in some situations and made it correctly report 05/30/02 for incompatible format;
Reworked the PS/2 Model 80 Type 2 memory handling a bit;
The emulator now allocates the few MB of space needed for pages for the entire 4 GB RAM space at the startup and only memset's it to 0 on hard reset - should make sure DMA page reads from/writes to memory-mapped devices no longer crash the emulator on invalidating the memory range;
Applied app applicable PCem patches;
The PS/1 Model 2133 now also applies PS/2-style NMI mask handling - fixes the 486 recompiler on this machine;
Added the missing #include of "cpu/cpu.h" in io.c, fixes compiling when I/O tracing is enabled.

src/mem.c

@@ -1358,17 +1358,17 @@ void mem_init(void)
         writelookup2 = malloc(1024 * 1024 * sizeof(uintptr_t));
 	rom = NULL;
         biosmask = 0xffff;
-        pages = malloc((((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
+        pages = malloc((1 << 20) * sizeof(page_t));
         page_lookup = malloc((1 << 20) * sizeof(page_t *));
 
         memset(ram, 0, mem_size * 1024);
-        memset(pages, 0, (((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
+        memset(pages, 0, (1 << 20) * sizeof(page_t));
         
         memset(page_lookup, 0, (1 << 20) * sizeof(page_t *));
 
 	memset(ram_mapped_addr, 0, 64 * sizeof(uint32_t));
         
-        for (c = 0; c < (((mem_size + 384) * 1024) >> 12); c++)
+        for (c = 0; c < (1 << 20); c++)
         {
                 pages[c].mem = &ram[c << 12];
                 pages[c].write_b = mem_write_ramb_page;
@@ -1461,10 +1461,8 @@ void mem_resize()
         ram = malloc(mem_size * 1024);
         memset(ram, 0, mem_size * 1024);
         
-        free(pages);
-        pages = malloc((((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
-        memset(pages, 0, (((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
-        for (c = 0; c < (((mem_size + 384) * 1024) >> 12); c++)
+        memset(pages, 0, (1 << 20) * sizeof(page_t));
+        for (c = 0; c < (1 << 20); c++)
         {
                 pages[c].mem = &ram[c << 12];
                 pages[c].write_b = mem_write_ramb_page;