From 3b70a07f9c824356a373cc5e2804d31105385623 Mon Sep 17 00:00:00 2001 From: rej Date: Thu, 9 Nov 2023 13:09:45 +0100 Subject: [PATCH] Even more documentation massaging --- info.yaml | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/info.yaml b/info.yaml index d66cb93..0854b8d 100644 --- a/info.yaml +++ b/info.yaml @@ -144,7 +144,7 @@ documentation: The data bus of the SN76489 chip has to be connected to microcontroller and receive a regular stream of commands. - The SN76489 produces audio output and has to be connected to a speaker. There are several ways how overall schematics can be established. + The SN76489 produces audio output and has to be connected to a speaker. There are several ways how the overall schematics can be established. ___8-bit parallel output via DAC___ One option is to connect off the shelf data parallel Digital to Analog Converter (DAC) for example [Digilent R2R Pmod](https://digilent.com/reference/pmod/pmodr2r/start) to the output pins and @@ -251,15 +251,15 @@ documentation: Hold **/WE** low once data bus pins are set to the desired values. Pull **/WE** high again before setting different value on the data bus. - ```10001100``` Set **channel #0** tone 4 low bits to **$C_{hex} = 1100_{bin}$** + ```10001100``` Set **channel #0** tone 4 low bits to $C_{hex} = 1100_{bin}$ - ```00010001``` Set **channel #0** tone 6 high bits to **$11_{hex} = 10001_{bin}$** + ```00010001``` Set **channel #0** tone 6 high bits to $11_{hex} = 010001_{bin}$ - ```10010000``` Set **channel #0** volume to 100% (attenuation = **0**) + ```10010000``` Set **channel #0** volume to **100%**, attenuation 4-bits are $0_{dec} = 0000_{bin}$ ```11100100``` Set **channel #3** noise type to **white** and divider to **512** - ```11111000``` Set **channel #3** noise volume to 50% (attenuation = **8**) + ```11111000``` Set **channel #3** noise volume to **50%**, attenuation 4-bits are $8_{dec} = 1000_{bin}$ ``` Timing diagram @@ -306,7 +306,7 @@ documentation: | 1 | 0 | $clock_{frequency} / (256_{cycles} * note_{frequency})$ | - **Example music recorded from the chip simulation** + **Some examples of music recorded from the chip simulation** - [https://www.youtube.com/watch?v=ghBGasckpSY](Crazee Rider BBC Micro game) - [https://www.youtube.com/watch?v=HXLAdA02I-w](MISSION76496 tune for Sega Master System)