diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 578d4fa..038dddf 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -328,7 +328,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 			ports = ncr_53c400a_ports;
 			break;
 		case BOARD_DTC3181E:
-			flags = FLAG_NO_PSEUDO_DMA;
+			flags = FLAG_NO_DMA_FIXUP;
 			ports = dtc_3181e_ports;
 			break;
 		}
@@ -401,6 +401,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 #ifndef SCSI_G_NCR5380_MEM
 		instance->io_port = overrides[current_override].NCR5380_map_name;
 		instance->n_io_port = region_size;
+		hostdata->io_width = 1; /* 8-bit PDMA by default */
 
 		/*
 		 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
@@ -413,10 +414,14 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 			hostdata->c400_blk_cnt = 1;
 			hostdata->c400_host_buf = 4;
 			break;
+		case BOARD_DTC3181E:
+			hostdata->io_width = 2;	/* 16-bit PDMA */
+			/* fall through */
 		case BOARD_NCR53C400A:
 			hostdata->c400_ctl_status = 9;
 			hostdata->c400_blk_cnt = 10;
 			hostdata->c400_host_buf = 8;
+			hostdata->c400_host_idx = 13;
 			break;
 		}
 #else
@@ -433,7 +438,8 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 			goto out_unregister;
 
 		if (overrides[current_override].board == BOARD_NCR53C400 ||
-		    overrides[current_override].board == BOARD_NCR53C400A)
+		    overrides[current_override].board == BOARD_NCR53C400A ||
+		    overrides[current_override].board == BOARD_DTC3181E)
 			NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
 
 		NCR5380_maybe_reset_bus(instance);
@@ -559,7 +565,11 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
 			; /* FIXME - no timeout */
 
 #ifndef SCSI_G_NCR5380_MEM
-		insb(instance->io_port + hostdata->c400_host_buf,
+		if (hostdata->io_width == 2)
+			insw(instance->io_port + hostdata->c400_host_buf,
+							dst + start, 64);
+		else
+			insb(instance->io_port + hostdata->c400_host_buf,
 							dst + start, 128);
 #else
 		/* implies SCSI_G_NCR5380_MEM */
@@ -575,7 +585,11 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
 			; /* FIXME - no timeout */
 
 #ifndef SCSI_G_NCR5380_MEM
-		insb(instance->io_port + hostdata->c400_host_buf,
+		if (hostdata->io_width == 2)
+			insw(instance->io_port + hostdata->c400_host_buf,
+							dst + start, 64);
+		else
+			insb(instance->io_port + hostdata->c400_host_buf,
 							dst + start, 128);
 #else
 		/* implies SCSI_G_NCR5380_MEM */
@@ -633,7 +647,11 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
 		while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
 			; // FIXME - timeout
 #ifndef SCSI_G_NCR5380_MEM
-		outsb(instance->io_port + hostdata->c400_host_buf,
+		if (hostdata->io_width == 2)
+			outsw(instance->io_port + hostdata->c400_host_buf,
+							src + start, 64);
+		else
+			outsb(instance->io_port + hostdata->c400_host_buf,
 							src + start, 128);
 #else
 		/* implies SCSI_G_NCR5380_MEM */
@@ -648,7 +666,11 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
 			; // FIXME - no timeout
 
 #ifndef SCSI_G_NCR5380_MEM
-		outsb(instance->io_port + hostdata->c400_host_buf,
+		if (hostdata->io_width == 2)
+			outsw(instance->io_port + hostdata->c400_host_buf,
+							src + start, 64);
+		else
+			outsb(instance->io_port + hostdata->c400_host_buf,
 							src + start, 128);
 #else
 		/* implies SCSI_G_NCR5380_MEM */
@@ -669,8 +691,10 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
 	/* All documentation says to check for this. Maybe my hardware is too
 	 * fast. Waiting for it seems to work fine! KLL
 	 */
-	while (!(i = NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
-		;	// FIXME - no timeout
+	while (!(i = NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ)) {
+		udelay(4); /* DTC436 chip hangs without this */
+		/* FIXME - no timeout */
+	}
 
 	/*
 	 * I know. i is certainly != 0 here but the loop is new. See previous
diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h
index c5e57b7..b3936aa 100644
--- a/drivers/scsi/g_NCR5380.h
+++ b/drivers/scsi/g_NCR5380.h
@@ -44,7 +44,9 @@
 #define NCR5380_implementation_fields \
 	int c400_ctl_status; \
 	int c400_blk_cnt; \
-	int c400_host_buf;
+	int c400_host_buf; \
+	int c400_host_idx; \
+	int io_width;
 
 #else 
 /* therefore SCSI_G_NCR5380_MEM */
