diff --git a/src/emu/cpu/mn10200/mn10200.c b/src/emu/cpu/mn10200/mn10200.c
index 2d293b910f9..c6c5dad2038 100644
--- a/src/emu/cpu/mn10200/mn10200.c
+++ b/src/emu/cpu/mn10200/mn10200.c
@@ -2,7 +2,7 @@
     Panasonic MN10200 emulator
 
     Written by Olivier Galibert
-    MAME conversion, timers, and IRQ controller by R. Belmont
+    Peripherals and improvements by R. Belmont and hap
 
 */
 
diff --git a/src/emu/sound/zsg2.c b/src/emu/sound/zsg2.c
index 6fa7ae64dff..99cd9fe4790 100644
--- a/src/emu/sound/zsg2.c
+++ b/src/emu/sound/zsg2.c
@@ -3,6 +3,7 @@
 
     Written by Olivier Galibert
     MAME conversion by R. Belmont
+    Working emulation by The Talentuous Hands Of The Popularious hap
 
     Copyright Nicola Salmoria and the MAME Team.
     Visit http://mamedev.org for licensing and usage restrictions.
@@ -46,6 +47,7 @@
 
 TODO:
 - volume/panning is linear? volume slides are too steep
+- most music sounds tinny, probably due to missing DSP?
 - what is reg 0xa/0xc? seems related to volume
 - identify sample flags
 - memory reads out of range sometimes