From c8e09acc7be2b65b179bf34fd8ab8c1ff87f9ea2 Mon Sep 17 00:00:00 2001 From: Thomas Harte Date: Thu, 15 Feb 2024 08:56:06 -0500 Subject: [PATCH] Updated The Mockingboard (markdown) --- The-Mockingboard.md | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/The-Mockingboard.md b/The-Mockingboard.md index 13047a9..2481f17 100644 --- a/The-Mockingboard.md +++ b/The-Mockingboard.md @@ -6,8 +6,14 @@ Each AY is connected to its 6522: * port A is connected to the AY's data pins; * bit 0 of port B is connected to the AY's BC1; * bit 1 of port B is connected to the AY's BDIR; -* bit 2 of port B is connected to the AY's BC2; and -* the AY's reset is active if all of bits 0, 1 and 2 are reset. +* BC2 is connected to +5v; and +* bit 2 of port B is connected to the AY's reset. + +So, logically: +* BC1 is active if bit 0 is set; +* BDIR is active if bit 1 is set; +* BC2 is always active; +* reset will occur if bit 2 is reset. The three channels from each AY are mixed together with equal volume.