Added a second set of physical address byte read and write functions in mem.c that are now used by dma.c so that DMA reads and writes do not go through the CPU's paging mechanism anymore - fixes Adaptec and BusLogic SCSI drivers in NT 3.1;

Applied some more of greatpsycho's CPU patches;
Reworked the PS/2 Model 80 split memory block handling and removed the top 256k remap from it (that's what the split memory block is for) - fixes OS/2 2.x on that machine.

src/floppy/floppy.c

@@ -323,6 +323,7 @@ void floppy_set_rate(int drive, int drvden, int rate)
 		                floppy_period = 4;
 		                break;
 		}
+		break;
                 case 2: /*Double density*/
                 floppy_period = 32;
                 break;