From 0fbad045de7da6883d1930f81e895f59dc49c0b4 Mon Sep 17 00:00:00 2001 From: Scott Stone Date: Thu, 3 Aug 2017 21:37:25 -0400 Subject: [PATCH] Added note regarding undocumented playback feature for Orchestra-90 (nw) --- src/devices/bus/coco/coco_orch90.cpp | 13 +++++++++++++ 1 file changed, 13 insertions(+) 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"