From 2ffec02e26561ebaf2d0390983c7e64095473bf8 Mon Sep 17 00:00:00 2001 From: tildearrow Date: Wed, 22 Jun 2022 15:15:24 -0500 Subject: [PATCH] Revert "Added "c" in "channel" typo and added a TI-99 bit (#551)" This reverts commit a65b4ded00fe708a1de443d8b283bfd8bb9ea2b1. --- papers/doc/7-systems/sms.md | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/papers/doc/7-systems/sms.md b/papers/doc/7-systems/sms.md index 882085f1..53560a97 100644 --- a/papers/doc/7-systems/sms.md +++ b/papers/doc/7-systems/sms.md @@ -6,13 +6,10 @@ surely had better graphics than NES, but its sound (fairly weak, 4ch PSG with A- this console is powered by a derivative of the Texas Instruments SN76489. -the original iteration of the SN76489 used in the TI-99/4A computers was clocked much lower at 447 kHz, being able to play as low as 13.670 Hz (A -1). consequentially, pitch accuracy for higher notes is compromised. - - # effects - `20xy`: set noise mode. - - `x` controls whether to inherit frequency from channel 3. + - `x` controls whether to inherit frequency from hannel 3. - 0: use one of 3 preset frequencies (C: A-2; C#: A-3; D: A-4). - 1: use frequency of channel 3. - `y` controls whether to select noise or thin pulse.