diff --git a/src/mess/drivers/cat.c b/src/mess/drivers/cat.c
index 2e880be8320..dcd5c52f7be 100644
--- a/src/mess/drivers/cat.c
+++ b/src/mess/drivers/cat.c
@@ -164,15 +164,15 @@ Board name: 950-0001C
  _________________|||||||||___________________________________________________________________________________
 |                     J8               [=======J3=======]  ____                                               |
 =                                                         /    \  (E2)                                        |
-= Jx                   74LS107   J5                       |PB1 |        uA339     MC3403                      |
-|                                          7407           \____/                                              |
+= Jx                   74LS107   J5                       |PB1 |        uA339     MC3403                 -----|
+|                                          7407           \____/                                         J7   =
 | Y1       "TIMING B" 74LS132    74LS175                                                                 -----|
-|                                                  ____________                            4N37  Relay   J7   =
-| TMS4256   74LS161  "DECODE E" "DISK 3.5C"       |            |                                         -----|
-|                                                 |  MC6850P   |                                         J6   =
-| TMS4256   74LS166   74HCT259   74LS299          '------------'        MC3403    MC3403                 -----|
-|                      ___________________     ___________________                                      .-----|
-| TMS4256   74LS373   |                   |   |                   |                                     |J1   =
+|                                                  ____________                            4N37  Relay   -----|
+| TMS4256   74LS161  "DECODE E" "DISK 3.5C"       |            |                                         J6   =
+|                                                 |  MC6850P   |                                         -----|
+| TMS4256   74LS166   74HCT259   74LS299          '------------'        MC3403    MC3403                 _____|
+|                      ___________________     ___________________                                      |     =
+| TMS4256   74LS373   |                   |   |                   |                                     | J1  =
 |                     |   MC68008P8       |   |       R6522P      |                                     |     =
 | TMS4256   74F153    '-------------------'   '-------------------'     MN4053    MN4053                | B   =
 |                                    (E1)                                                               | R   =