diff --git a/src/mess/machine/dp8390.c b/src/mess/machine/dp8390.c
index 32502dfb95d..a1ac879b12c 100644
--- a/src/mess/machine/dp8390.c
+++ b/src/mess/machine/dp8390.c
@@ -298,6 +298,9 @@ READ16_MEMBER(dp8390_device::dp8390_r) {
 	case 0x8f:
 		data = m_regs.imr;
 		break;
+	case 0xc0:
+		data = m_regs.cr;
+		break;
 	default:
 		if(m_type == TYPE_RTL8019A) {
 			switch((offset & 0x0f)|(m_regs.cr & 0xc0)) {
@@ -307,9 +310,7 @@ READ16_MEMBER(dp8390_device::dp8390_r) {
 				case 0x0b:
 					data = 'p';
 					break;
-				case 0xc0:
-					data = m_regs.cr;
-					break;
+
 				case 0xc1:
 					data = m_8019regs.cr9346;
 					break;
@@ -465,12 +466,12 @@ WRITE16_MEMBER(dp8390_device::dp8390_w) {
 	case 0x87:
 		m_regs.ac = (m_regs.ac & 0xff00) | data;
 		break;
+	case 0xc0:
+		set_cr(data);
+		break;
 	default:
 		if(m_type == TYPE_RTL8019A) {
 			switch((offset & 0x0f)|(m_regs.cr & 0xc0)) {
-				case 0xc0:
-					set_cr(data);
-					break;
 				// XXX: rest of the regs
 				default:
 					logerror("rtl8019: invalid write page %01X reg %02X data %04X\n", (m_regs.cr & 0xc0) >> 6, offset & 0x0f, data);
diff --git a/src/mess/machine/ne1000.c b/src/mess/machine/ne1000.c
index 9e4eab9f4a3..771c3c091cd 100644
--- a/src/mess/machine/ne1000.c
+++ b/src/mess/machine/ne1000.c
@@ -97,6 +97,7 @@ WRITE_LINE_MEMBER(ne1000_device::ne1000_irq_w) {
 }
 
 READ8_MEMBER(ne1000_device::ne1000_mem_read) {
+	offset &= ~0xc000; // verify
 	if(offset < 16) return m_prom[offset];
 	if((offset < (8*1024)) || (offset >= (16*1024))) {
 		logerror("ne1000: invalid memory read %04X\n", offset);
@@ -106,6 +107,7 @@ READ8_MEMBER(ne1000_device::ne1000_mem_read) {
 }
 
 WRITE8_MEMBER(ne1000_device::ne1000_mem_write) {
+	offset &= ~0xc000; // verify
 	if((offset < (8*1024)) || (offset >= (16*1024))) {
 		logerror("ne1000: invalid memory write %04X\n", offset);
 		return;
diff --git a/src/mess/machine/ne2000.c b/src/mess/machine/ne2000.c
index 924ff2f5e1b..ec0ef281134 100644
--- a/src/mess/machine/ne2000.c
+++ b/src/mess/machine/ne2000.c
@@ -107,6 +107,7 @@ WRITE_LINE_MEMBER(ne2000_device::ne2000_irq_w) {
 }
 
 READ8_MEMBER(ne2000_device::ne2000_mem_read) {
+	offset &= ~0x8000;
 	if(offset < 32) return m_prom[offset>>1];
 	if((offset < (16*1024)) || (offset >= (32*1024))) {
 		logerror("ne2000: invalid memory read %04X\n", offset);
@@ -116,6 +117,7 @@ READ8_MEMBER(ne2000_device::ne2000_mem_read) {
 }
 
 WRITE8_MEMBER(ne2000_device::ne2000_mem_write) {
+	offset &= ~0x8000;
 	if((offset < (16*1024)) || (offset >= (32*1024))) {
 		logerror("ne2000: invalid memory write %04X\n", offset);
 		return;