diff --git a/src/mame/drivers/pcat_dyn.cpp b/src/mame/drivers/pcat_dyn.cpp
index c80bf794174..2e473734ef8 100644
--- a/src/mame/drivers/pcat_dyn.cpp
+++ b/src/mame/drivers/pcat_dyn.cpp
@@ -9,23 +9,13 @@ Unmodified 486 PC-AT HW. Input uses a trackball device that isn't PC standard af
 Jet Way Information Co. OP495SLC motherboard
  - AMD Am486-DX40 CPU
  - Trident TVGA9000i video card
+ - Breve Technologies audio adapter
 
 preliminary driver by Angelo Salese
 
-TODO:
-- Returns CMOS checksum error, can't enter into BIOS setup screens to set that up ... it's certainly a MESS-to-MAME
-  conversion bug or a keyboard device issue, since it works fine in MESS. (Update: it's the keyboard device)
-
-keyboard trick;
-- Set 0x41c to zero then set the scancode accordingly:
-- bp f1699 ah = 0x3b
-- bp f53b9 al = scancode
-- bp f08d9 ah = scancode
-
-0x48 is up 0x4d is down 0x50 is right 0x4b is left
-0x3c/0x3d is pageup/pagedown
-0x01 is esc
-0x0d is enter
+Notes:
+Data from the 99378275.SN file on the rom filesystem is scrambled and written to DF80:0000-0100 then read back.
+If the output isn't satisfactory, it prints "I/O BOARD FAILURE".
 
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