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author RobertoFresca <robbie@mamedev.org>2017-10-08 16:05:32 -0300
committer RobertoFresca <robbie@mamedev.org>2017-10-08 16:05:32 -0300
commita2a19de794d0dd186da185ef77b62a98b8980838 (patch)
tree0c72e0b29db9c1ed19ec75d53e40be5dcc6e0607 /src/mame/drivers/notechan.cpp
parent362beba7ab5bffd3ef9a1bf47740a66535e69205 (diff)
Note Chance: Rearranged the test panel lamps to be D7-->D0.
Also arranged the notes to talk about ports and lines instead of lamps. Added technical notes about the 4-bit counter found in port FFh. [Roberto Fresca]
Diffstat (limited to 'src/mame/drivers/notechan.cpp')
-rw-r--r--src/mame/drivers/notechan.cpp17
1 files changed, 10 insertions, 7 deletions
diff --git a/src/mame/drivers/notechan.cpp b/src/mame/drivers/notechan.cpp
index d7c37fcecad..b702d1b8dd3 100644
--- a/src/mame/drivers/notechan.cpp
+++ b/src/mame/drivers/notechan.cpp
@@ -315,15 +315,18 @@ static INPUT_PORTS_START( notechan )
Port FAh:
- (1) Pulsed under reset, activates lamp 21 and triggers sample #20 (boing). Maybe it's
- the 'start' button.
+ (1) Pulsed under reset, activates port FAh-D5 (lamp 21) and triggers sample #20 (boing
+ or FX sound, depending of the OKI bank). Maybe it's the 'start' button.
(2) Pulsing and keep pressed under reset, triggers the sample #01 (cling) and starts
- a sequence of lamps (24-25-26). Then triggers sample #04 (voice). After a little
- while also triggers sample #05 (voice).
-
- (3) Pulsing this input lites lamp 17 and triggers sample #01 (cling). Maybe it's
- the 'coin-in' button.
+ a sequence of 4-lines output through port FFh D3-D2-D1-D0 (lamps 27-26-25-24)
+ that seems a 4-bits countdown (maybe related to the 7segment LED that counts the
+ credits). Then triggers sample #04 (voice or effect depending of the OKI bank).
+ After a little while also triggers sample #05 (voice).
+ Maybe it's some kind of hardware testing mode...
+
+ (3) Pulsing this input activates port FAh-D1 (lamp 17) and triggers sample #01 (cling).
+ Maybe it's the 'coin-in' button.
*/
PORT_START("DSW")