sd:appendix_3_sound_system
Differences
This shows you the differences between two versions of the page.
| Next revision | Previous revision | ||
| sd:appendix_3_sound_system [2026/02/25 02:55] – created appledog | sd:appendix_3_sound_system [2026/02/25 04:32] (current) – removed appledog | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | = Appendix 4 Sound System | ||
| - | == Sound System Memory Map | ||
| - | Also see [[Appendix 3 Memory Map]]. | ||
| - | |||
| - | === Sound System ($01EF80–$01EFBF) – 64 bytes total | ||
| - | |||
| - | ^ Address Range ^ Size ^ Symbol / Register ^ Description ^ | ||
| - | | $01EF80–$01EF8F | 16 bytes | SOUND0_BASE | **Voice 0** – Complete voice channel (SID-like voice 0) | | ||
| - | | $01EF80 | 1 byte | SOUND0_FREQ_LO | Frequency low byte (bits 7–0) | | ||
| - | | $01EF81 | 1 byte | SOUND0_FREQ_HI | Frequency high byte (bits 15–8) | | ||
| - | | $01EF82 | 1 byte | SOUND0_GATE | Gate / Waveform select (gate bit + waveform type: noise, pulse, saw, triangle, etc.) | | ||
| - | | $01EF83 | 1 byte | SOUND0_VOLUME | Master volume for voice 0 (usually 0–15, may include global volume in some implementations)| | ||
| - | | $01EF84 | 1 byte | SOUND0_ATTACK | Attack rate (0–15) | | ||
| - | | $01EF85 | 1 byte | SOUND0_DECAY | Decay rate (0–15) | | ||
| - | | $01EF86 | 1 byte | SOUND0_SUSTAIN | Sustain level (0–15) | | ||
| - | | $01EF87 | 1 byte | SOUND0_RELEASE | Release rate (0–15) | | ||
| - | | $01EF88 | 1 byte | SOUND0_DATA1 | Voice-specific control / extra parameter 1 (e.g. pulse width low, filter routing, etc.) | | ||
| - | | $01EF89 | 1 byte | SOUND0_DATA2 | Voice-specific control / extra parameter 2 (e.g. pulse width high, ring/mod flags, etc.) | | ||
| - | | $01EF8A–$01EF8F | 6 bytes | — | **Reserved / unused / future expansion** for Voice 0 | | ||
| - | | $01EF90–$01EF9F | 16 bytes | SOUND1_BASE | **Voice 1** – Complete voice channel (SID-like voice 1) | | ||
| - | | $01EF90 | 1 byte | SOUND1_FREQ_LO | Frequency low byte | | ||
| - | | $01EF91 | 1 byte | SOUND1_FREQ_HI | Frequency high byte | | ||
| - | | $01EF92 | 1 byte | SOUND1_GATE | Gate / Waveform select | | ||
| - | | $01EF93 | 1 byte | SOUND1_VOLUME | Volume for voice 1 | | ||
| - | | $01EF94 | 1 byte | SOUND1_ATTACK | Attack rate | | ||
| - | | $01EF95 | 1 byte | SOUND1_DECAY | Decay rate | | ||
| - | | $01EF96 | 1 byte | SOUND1_SUSTAIN | Sustain level | | ||
| - | | $01EF97 | 1 byte | SOUND1_RELEASE | Release rate | | ||
| - | | $01EF98 | 1 byte | SOUND1_DATA1 | Extra control 1 | | ||
| - | | $01EF99 | 1 byte | SOUND1_DATA2 | Extra control 2 | | ||
| - | | $01EF9A–$01EF9F | 6 bytes | — | **Reserved / unused / future expansion** for Voice 1 | | ||
| - | | $01EFA0–$01EFAF | 16 bytes | SOUND2_BASE | **Voice 2** – Complete voice channel (SID-like voice 2) | | ||
| - | | $01EFA0 | 1 byte | SOUND2_FREQ_LO | Frequency low byte | | ||
| - | | $01EFA1 | 1 byte | SOUND2_FREQ_HI | Frequency high byte | | ||
| - | | $01EFA2 | 1 byte | SOUND2_GATE | Gate / Waveform select | | ||
| - | | $01EFA3 | 1 byte | SOUND2_VOLUME | Volume for voice 2 | | ||
| - | | $01EFA4 | 1 byte | SOUND2_ATTACK | Attack rate | | ||
| - | | $01EFA5 | 1 byte | SOUND2_DECAY | Decay rate | | ||
| - | | $01EFA6 | 1 byte | SOUND2_SUSTAIN | Sustain level | | ||
| - | | $01EFA7 | 1 byte | SOUND2_RELEASE | Release rate | | ||
| - | | $01EFA8 | 1 byte | SOUND2_DATA1 | Extra control 1 | | ||
| - | | $01EFA9 | 1 byte | SOUND2_DATA2 | Extra control 2 | | ||
| - | | $01EFAA–$01EFAF | 6 bytes | — | **Reserved / unused / future expansion** for Voice 2 | | ||
| - | | $01EFB0–$01EFBF | 16 bytes | SOUND3_BASE | **Voice 3** – Complete voice channel (SID-like voice 3) | | ||
| - | | $01EFB0 | 1 byte | SOUND3_FREQ_LO | Frequency low byte | | ||
| - | | $01EFB1 | 1 byte | SOUND3_FREQ_HI | Frequency high byte | | ||
| - | | $01EFB2 | 1 byte | SOUND3_GATE | Gate / Waveform select | | ||
| - | | $01EFB3 | 1 byte | SOUND3_VOLUME | Volume for voice 3 | | ||
| - | | $01EFB4 | 1 byte | SOUND3_ATTACK | Attack rate | | ||
| - | | $01EFB5 | 1 byte | SOUND3_DECAY | Decay rate | | ||
| - | | $01EFB6 | 1 byte | SOUND3_SUSTAIN | Sustain level | | ||
| - | | $01EFB7 | 1 byte | SOUND3_RELEASE | Release rate | | ||
| - | | $01EFB8 | 1 byte | SOUND3_DATA1 | Extra control 1 | | ||
| - | | $01EFB9 | 1 byte | SOUND3_DATA2 | Extra control 2 | | ||
| - | | $01EFBA–$01EFBF | 6 bytes | — | **Reserved / unused / future expansion** for Voice 3 | | ||
sd/appendix_3_sound_system.1771988107.txt.gz · Last modified: by appledog