diff --git a/doc/README_buildsystem_Vivado.md b/doc/README_buildsystem_Vivado.md
index de58d4f5..dbdb44c7 100644
--- a/doc/README_buildsystem_Vivado.md
+++ b/doc/README_buildsystem_Vivado.md
@@ -141,7 +141,8 @@ work areas, but in general this is not needed (since V0.73).
 
 Notes:
 - Many post-synthesis functional currently fail due to startup and 
-  initialization problems (see issue V0.73-2).
+  initialization problems
+  (see [issue #10](https://github.com/wfjm/w11/issues/10)).
 
 #### <a id="buildtb-xsim">With Vivado xsim</a>
 
@@ -169,10 +170,12 @@ functional and timing models.
 
 Notes:
 - as of vivado 2016.2 `xelab` shows sometimes extremely long build times, 
-  especially for generated post-synthesis vhdl models (see issue V0.73-1).
+  especially for generated post-synthesis vhdl models
+  (see [issue #9](https://github.com/wfjm/w11/issues/9)).
 - Many post-synthesis functional and especially post-routing timing 
   simulations currently fail due to startup and initialization problems
-  (see issue V0.73-2).
+  (see [issue #10](https://github.com/wfjm/w11/issues/10)).
+
  
 ### <a id="buildfpga">Building FPGA bit files</a>
 
diff --git a/doc/w11a_known_issues.md b/doc/w11a_known_issues.md
index 91535eba..5627b00f 100644
--- a/doc/w11a_known_issues.md
+++ b/doc/w11a_known_issues.md
@@ -5,7 +5,7 @@ General issues are listed on a separate document
 
 This file descibes issues of the w11 CPU.
 
-###Table of content
+### Table of content
 
 - [Known differences between w11a and KB11-C (11/70)](#user-content-diff)
 - [Known limitations](#user-content-lim)
@@ -16,12 +16,13 @@ This file descibes issues of the w11 CPU.
 - the `SPL` instruction in the 11/70 always fetched the next instruction
   regardless of pending device or even console interrupts. This is known
   as the infamous _spl bug_, see
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-September/001086.html
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-October/001087.html
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-October/001088.html
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-October/001089.html
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-October/001095.html
-  - http://minnie.tuhs.org/pipermail/tuhs/2006-October/001096.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-September/002692.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002693.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002694.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002695.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002701.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002695.html
+  - https://minnie.tuhs.org/pipermail/tuhs/2006-October/002702.html
 
   In the w11a the `SPL` has 11/70 semantics in kernel mode, thus next no 
   traps or interrupts, but in supervisor and user mode `SPL` really acts as 
diff --git a/tools/man/man1/vbomconv.1 b/tools/man/man1/vbomconv.1
index 95a32f51..f7da0f49 100644
--- a/tools/man/man1/vbomconv.1
+++ b/tools/man/man1/vbomconv.1
@@ -1,5 +1,5 @@
 .\"  -*- nroff -*-
-.\"  $Id: vbomconv.1 1076 2018-12-02 12:45:49Z mueller $
+.\"  $Id: vbomconv.1 1107 2019-01-27 12:54:48Z mueller $
 .\"
 .\" Copyright 2010-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 .\" 
@@ -406,7 +406,7 @@ proper compilation order.
 .\" ----------------------------------------------
 .TP
 .B \-\-vsim_prj
-This action writes to \fIstdout\fP a shell script which will generated the
+This action writes to \fIstdout\fP a shell script which will generate the
 Vivado simulation snapshot and a short forwarder script for starting the
 simulation.
 .