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Added note regarding undocumented playback feature for Orchestra-90 (nw)

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Scott Stone 2017-08-03 21:37:25 -04:00
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src/devices/bus/coco/coco_orch90.cpp
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@ -10,6 +10,19 @@
supporting stereo sound. The left channel was at $FF7A, and the right supporting stereo sound. The left channel was at $FF7A, and the right
channel was at $FF7B 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" #include "emu.h"