diff --git a/devices/pcx86/machine/5150/cga/256kb/debugger/machine.xml b/devices/pcx86/machine/5150/cga/256kb/debugger/machine.xml
index 5c1332dd3..88bdae6a9 100644
--- a/devices/pcx86/machine/5150/cga/256kb/debugger/machine.xml
+++ b/devices/pcx86/machine/5150/cga/256kb/debugger/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 256K, Debugger</name>
 	<computer id="pc-cga-256k" name="IBM PC"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/devices/pcx86/machine/5150/cga/256kb/machine.xml b/devices/pcx86/machine/5150/cga/256kb/machine.xml
index 1fdf48446..c0fc998cc 100644
--- a/devices/pcx86/machine/5150/cga/256kb/machine.xml
+++ b/devices/pcx86/machine/5150/cga/256kb/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 256K</name>
 	<computer id="pc-cga-256k" name="IBM PC"/>
 	<ram id="ramLow" addr="0x00000" test="false" comment="no memory test"/>
diff --git a/devices/pcx86/machine/5150/cga/384kb/softkbd/machine.xml b/devices/pcx86/machine/5150/cga/384kb/softkbd/machine.xml
index 8cc64d15c..7c42c756e 100644
--- a/devices/pcx86/machine/5150/cga/384kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5150/cga/384kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 384K, Soft Keyboard</name>
 	<computer id="pc-cga-384k" name="IBM PC"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/devices/pcx86/machine/5150/cga/64kb/debugger/machine.xml b/devices/pcx86/machine/5150/cga/64kb/debugger/machine.xml
index 74943359f..bbe567786 100644
--- a/devices/pcx86/machine/5150/cga/64kb/debugger/machine.xml
+++ b/devices/pcx86/machine/5150/cga/64kb/debugger/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 64K</name>
 	<computer id="pc-cga-64k" name="IBM PC"/>
 	<ram id="ramLow" addr="0x00000"/>
diff --git a/devices/pcx86/machine/5150/cga/64kb/machine.xml b/devices/pcx86/machine/5150/cga/64kb/machine.xml
index c18047a3e..ba628f3ca 100644
--- a/devices/pcx86/machine/5150/cga/64kb/machine.xml
+++ b/devices/pcx86/machine/5150/cga/64kb/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 64K</name>
 	<computer id="pc-cga-64k" name="IBM PC"/>
 	<ram id="ramLow" addr="0x00000"/>
diff --git a/devices/pcx86/machine/5150/cga/64kb/softkbd/machine.xml b/devices/pcx86/machine/5150/cga/64kb/softkbd/machine.xml
index e45edd8b9..d3ebb214a 100644
--- a/devices/pcx86/machine/5150/cga/64kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5150/cga/64kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name>IBM PC (Model 5150), CGA, 64K</name>
 	<computer id="pc-cga-64k" name="IBM PC"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/devices/pcx86/machine/5150/mda/64kb/softkbd/machine.xml b/devices/pcx86/machine/5150/mda/64kb/softkbd/machine.xml
index 0ccbce182..bddb1eb0f 100644
--- a/devices/pcx86/machine/5150/mda/64kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5150/mda/64kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), MDA, 64K, Soft Keyboard</name>
 	<computer id="pc-mda-64k" name="IBM PC"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/devices/pcx86/machine/5160/cga/256kb/array/machine.xml b/devices/pcx86/machine/5160/cga/256kb/array/machine.xml
index 9b8d8bb28..cb0305c00 100644
--- a/devices/pcx86/machine/5160/cga/256kb/array/machine.xml
+++ b/devices/pcx86/machine/5160/cga/256kb/array/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name pos="center">IBM PC XT (Model 5160), CGA, 256K, 10Mb Drive</name>
 	<computer id="xt-cga-256k" name="IBM PC XT"/>
 	<ram id="ramLow" addr="0x00000" test="false"/>
diff --git a/devices/pcx86/machine/5160/cga/256kb/debugger/machine.xml b/devices/pcx86/machine/5160/cga/256kb/debugger/machine.xml
index 2c1cca365..e56d7317e 100644
--- a/devices/pcx86/machine/5160/cga/256kb/debugger/machine.xml
+++ b/devices/pcx86/machine/5160/cga/256kb/debugger/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC XT (Model 5160), CGA, 256Kb, 10Mb Drive</name>
 	<computer id="xt-cga-256k" name="IBM PC XT" resume="1"/>
 	<ram id="ramLow" addr="0x00000" test="false" comment="ROM BIOS memory test has been disabled"/>
diff --git a/devices/pcx86/machine/5160/cga/256kb/machine.xml b/devices/pcx86/machine/5160/cga/256kb/machine.xml
index 3e7cba456..3f0bb014d 100644
--- a/devices/pcx86/machine/5160/cga/256kb/machine.xml
+++ b/devices/pcx86/machine/5160/cga/256kb/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC XT (Model 5160), CGA, 256Kb, 10Mb Drive</name>
 	<computer id="xt-cga-256k" name="IBM PC XT" resume="1"/>
 	<ram id="ramLow" addr="0x00000"/>
diff --git a/devices/pcx86/machine/5160/cga/256kb/softkbd/machine.xml b/devices/pcx86/machine/5160/cga/256kb/softkbd/machine.xml
index e572f8b17..2bc0c933a 100644
--- a/devices/pcx86/machine/5160/cga/256kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5160/cga/256kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name>IBM PC XT (Model 5160), CGA, 256K, 10Mb Drive</name>
 	<computer id="xt-cga-256k" name="IBM PC XT"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/devices/pcx86/machine/5160/cga/512kb/softkbd/machine.xml b/devices/pcx86/machine/5160/cga/512kb/softkbd/machine.xml
index 89669465a..197445f2f 100644
--- a/devices/pcx86/machine/5160/cga/512kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5160/cga/512kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name pos="center">IBM PC XT (Model 5160), CGA, 512K, 10Mb Drive</name>
 	<computer id="xt-cga-512k" name="IBM PC XT"/>
 	<cpu id="cpu8088" model="8088" autostart="true"/>
diff --git a/devices/pcx86/machine/5160/cga/640kb/softkbd/machine.xml b/devices/pcx86/machine/5160/cga/640kb/softkbd/machine.xml
index f5b35e4ce..656b66ff2 100644
--- a/devices/pcx86/machine/5160/cga/640kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5160/cga/640kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name>IBM PC XT (Model 5160), CGA, 640K, 10Mb Drive</name>
 	<computer id="xt-cga-640k" name="IBM PC XT"/>
 	<cpu id="cpu8088" model="8088" autostart="true"/>
diff --git a/devices/pcx86/machine/5160/mda/64kb/softkbd/machine.xml b/devices/pcx86/machine/5160/mda/64kb/softkbd/machine.xml
index 3edb5e07e..6d9ff68f0 100644
--- a/devices/pcx86/machine/5160/mda/64kb/softkbd/machine.xml
+++ b/devices/pcx86/machine/5160/mda/64kb/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC XT (Model 5160), MDA, 64K, 10Mb Drive</name>
 	<computer id="xt-mda-64k" name="IBM PC XT"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/disks/pcx86/shareware/pcsig08/debugger/machine.xml b/disks/pcx86/shareware/pcsig08/debugger/machine.xml
index 834bd74bc..31c986660 100644
--- a/disks/pcx86/shareware/pcsig08/debugger/machine.xml
+++ b/disks/pcx86/shareware/pcsig08/debugger/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 256K</name>
 	<computer id="pc-cga-256k" name="IBM PC"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/disks/pcx86/shareware/pcsig08/machine.xml b/disks/pcx86/shareware/pcsig08/machine.xml
index 7b126875c..9afe5658f 100644
--- a/disks/pcx86/shareware/pcsig08/machine.xml
+++ b/disks/pcx86/shareware/pcsig08/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5150" type="pcx86" border="1" pos="center" background="white">
+<machine id="ibm5150" type="pcx86" border="1" pos="center" background="default">
 	<name pos="center">IBM PC (Model 5150), CGA, 256K</name>
 	<computer id="pc-cga-256k" name="IBM PC" resume="1"/>
 	<cpu id="cpu8088" model="8088"/>
diff --git a/disks/pcx86/windows/1.01/cga/softkbd/machine.xml b/disks/pcx86/windows/1.01/cga/softkbd/machine.xml
index 5075a62cb..c6e61a074 100644
--- a/disks/pcx86/windows/1.01/cga/softkbd/machine.xml
+++ b/disks/pcx86/windows/1.01/cga/softkbd/machine.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="/versions/pcx86/1.35.1/machine.xsl"?>
-<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="white">
+<machine id="ibm5160" type="pcx86" border="1" width="1000px" pos="center" background="default">
 	<name>IBM PC XT (Model 5160), CGA, 256K, Windows 1.01</name>
 	<computer id="xt-cga-256k" name="IBM PC XT"/>
 	<cpu id="cpu8088" model="8088" autostart="true"/>