diff --git a/doc/c128.sgml b/doc/c128.sgml
index a98b04f49..460621be0 100644
--- a/doc/c128.sgml
+++ b/doc/c128.sgml
@@ -244,8 +244,9 @@ The default drivers, <tt/joy_stddrv (joy_static_stddrv)/, point to <tt/c128-stdj
   <tag><tt/c128-ptvjoy.joy (c128_ptvjoy_joy)/</tag>
   Driver for the Protovision 4-player adapter originally written by Groepaz
   for the C64, and converted for the C128 by Uz. See <url
-  url="http://www.protovision-online.de/hardw/hardwstart.htm"> for prices and
-  building instructions. Up to four joysticks are supported.
+  url="http://www.protovision-online.de/hardw/4_player.php?language=en"
+  name="Protovision shop"> for prices and building instructions. Up to four
+  joysticks are supported.
 
   <tag><tt/c128-stdjoy.joy (c128_stdjoy_joy)/</tag>
   Supports up to two joysticks connected to the standard joysticks ports of
diff --git a/doc/c64.sgml b/doc/c64.sgml
index 4bf43453d..40bcb37ac 100644
--- a/doc/c64.sgml
+++ b/doc/c64.sgml
@@ -319,8 +319,9 @@ The default drivers, <tt/joy_stddrv (joy_static_stddrv)/, point to <tt/c64-stdjo
 
   <tag><tt/c64-ptvjoy.joy (c64_ptvjoy_joy)/</tag>
   Driver for the Protovision 4-player adapter contributed by Groepaz. See
-  <url url="http://www.protovision-online.de/hardw/hardwstart.htm"> for prices and
-  building instructions. Up to four joysticks are supported.
+  <url url="http://www.protovision-online.de/hardw/4_player.php?language=en"
+  name="Protovision shop"> for prices and building instructions. Up to four
+  joysticks are supported.
 
   <tag><tt/c64-stdjoy.joy (c64_stdjoy_joy)/</tag>
   Supports up to two standard joysticks connected to the joysticks port of
diff --git a/doc/pet.sgml b/doc/pet.sgml
index 7c5bd71ea..fd61716dd 100644
--- a/doc/pet.sgml
+++ b/doc/pet.sgml
@@ -155,8 +155,9 @@ The default drivers, <tt/joy_stddrv (joy_static_stddrv)/, point to <tt/pet-stdjo
 
   <tag><tt/pet-ptvjoy.joy (pet_ptvjoy_joy)/</tag>
   Driver for the Protovision 4-player adapter contributed by Groepaz. See
-  <url url="http://www.protovision-online.de/hardw/hardwstart.htm"> for prices and
-  building instructions. Up to two joysticks are supported.
+  <url url="http://www.protovision-online.de/hardw/4_player.php?language=en"
+  name="Protovision shop"> for prices and building instructions. Up to two
+  joysticks are supported.
 
   <tag><tt/pet-stdjoy.joy (pet_stdjoy_joy)/</tag>
   Driver for the standard PET userport joystick.
diff --git a/doc/vic20.sgml b/doc/vic20.sgml
index 5fba59a13..b1a08ac83 100644
--- a/doc/vic20.sgml
+++ b/doc/vic20.sgml
@@ -161,8 +161,9 @@ The default drivers, <tt/joy_stddrv (joy_static_stddrv)/, point to <tt/vic20-std
 
   <tag><tt/vic20-ptvjoy.joy (vic20_ptvjoy_joy)/</tag>
   Driver for the Protovision 4-player adapter contributed by Groepaz. See
-  <url url="http://www.protovision-online.de/hardw/hardwstart.htm"> for prices and
-  building instructions. Up to three joysticks are supported.
+  <url url="http://www.protovision-online.de/hardw/4_player.php?language=en"
+  name="Protovision shop"> for prices and building instructions. Up to three
+  joysticks are supported.
 
 </descrip><p>