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author Scott Stone <tafoid@gmail.com>2017-08-03 21:37:25 -0400
committer Scott Stone <tafoid@gmail.com>2017-08-03 21:37:25 -0400
commit0fbad045de7da6883d1930f81e895f59dc49c0b4 (patch)
tree7557700647791d14533fda2553a092f8e64ccb59
parentf8cc689795a830a4f29790265d24c424931e593c (diff)
Added note regarding undocumented playback feature for Orchestra-90 (nw)
-rw-r--r--src/devices/bus/coco/coco_orch90.cpp13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/devices/bus/coco/coco_orch90.cpp b/src/devices/bus/coco/coco_orch90.cpp
index 2d80dcc1f4e..e5115240d70 100644
--- a/src/devices/bus/coco/coco_orch90.cpp
+++ b/src/devices/bus/coco/coco_orch90.cpp
@@ -10,6 +10,19 @@
supporting stereo sound. The left channel was at $FF7A, and the right
channel was at $FF7B
+
+ Hidden Code exists in the ORCH-90 to produce a higher quality output.
+ Once you start the PAK, hit "SHIFT+ENTER" at the title screen. Once you
+ are at command, type the following (playing the William Tell default):
+ "S" + "ENTER"
+ "P" + "SHIFT+ENTER"
+
+ The output will be cleaner due to code causing a change in CPU speed by
+ addressing CPU registers to run the 6809 at 2x speed.
+
+ "P" + "ENTER" will play at regular CPU speed. The difference should be
+ very noticable.
+
***************************************************************************/
#include "emu.h"