Added QEMU's fifo8 code.

Added the NCR 53c90 SCSI MCA card and reworked the AMD PCscsi/Tekram DC390 code to use a better port.

src/scsi/scsi.c

@@ -72,11 +72,11 @@ static SCSI_CARD scsi_cards[] = {
     { "t128",		&scsi_t128_device,	},
     { "t130b",		&scsi_t130b_device,	},
 #ifdef WALTJE
-    { "scsiat",		&scsi_scsiat_device,	},
     { "wd33c93",	&scsi_wd33c93_device,	},
 #endif
     { "aha1640",	&aha1640_device,	},
     { "bt640a",		&buslogic_640a_device,	},
+    { "ncr53c90",	&ncr53c90_mca_device,	},
     { "spock",		&spock_device,		},
     { "bt958d",		&buslogic_pci_device,	},
     { "ncr53c810",	&ncr53c810_pci_device,	},