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Initial audio duration code

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b1ackmai1er
2020-05-24 18:21:16 +08:00
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Source/Doc/Architecture.md
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@@ -1438,25 +1438,25 @@ result in a note change.
The following table shows the mapping of the input value in HL
to the corresponding octave and note.
+-------------------------------------------------------+
| | OCTAVE |
| Note |-----------------------------------------------+
| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|-------|-----|-----|-----|-----|-----|-----|-----|-----+
| Bb/A# | 0 | 48 | 96 | 144 | 192 | 240 | 288 | 336 |
| B | 4 | 52 | 100 | 148 | 196 | 244 | 292 | 340 |
| C | 8 | 56 | 104 | 152 | 200 | 248 | 296 | 344 |
| C#/Db | 12 | 60 | 108 | 156 | 204 | 252 | 300 | 348 |
| D | 16 | 64 | 112 | 160 | 208 | 256 | 304 | 352 |
| Eb/D# | 20 | 68 | 116 | 164 | 212 | 260 | 308 | 356 |
| E | 24 | 72 | 120 | 168 | 216 | 264 | 312 | 360 |
| F | 28 | 76 | 124 | 172 | 220 | 268 | 316 | 364 |
| F#/Gb | 32 | 80 | 128 | 176 | 224 | 272 | 320 | 368 |
| G | 36 | 84 | 132 | 180 | 228 | 276 | 324 | 372 |
| Ab/G# | 40 | 88 | 136 | 184 | 232 | 280 | 328 | 376 |
| A | 44 | 92 | 140 | 188 | 236 | 284 | 332 | 380 |
### Function 0x54 -- Sound Play (SNDPLAY)
+-------+---------------------------------------------------------------+
| | OCTAVE |
| Note +---------------------------------------------------------------+
| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|-------+-------|-------|-------|-------|-------|-------|-------|-------+
| Bb/A# | 0 | 48 | 96 | 144 | 192 | 240 | 288 | 336 |
| B | 4 | 52 | 100 | 148 | 196 | 244 | 292 | 340 |
| C | 8 | 56 | 104 | 152 | 200 | 248 | 296 | 344 |
| C#/Db | 12 | 60 | 108 | 156 | 204 | 252 | 300 | 348 |
| D | 16 | 64 | 112 | 160 | 208 | 256 | 304 | 352 |
| Eb/D# | 20 | 68 | 116 | 164 | 212 | 260 | 308 | 356 |
| E | 24 | 72 | 120 | 168 | 216 | 264 | 312 | 360 |
| F | 28 | 76 | 124 | 172 | 220 | 268 | 316 | 364 |
| F#/Gb | 32 | 80 | 128 | 176 | 224 | 272 | 320 | 368 |
| G | 36 | 84 | 132 | 180 | 228 | 276 | 324 | 372 |
| Ab/G# | 40 | 88 | 136 | 184 | 232 | 280 | 328 | 376 |
| A | 44 | 92 | 140 | 188 | 236 | 284 | 332 | 380 |
### Function 0x54 -- Sound Play SNDPLAY)
| _Entry Parameters_
| B: 0x54
@@ -1551,6 +1551,26 @@ SND_SN76489 | 0x01 | SN76489 | E: Left channel port, L: Right channel por
SND_AY38910 | 0x02 | AY-3-8910 | D: Address port, E: Data port
SND_BITMODE | 0x03 | I/O PORT | D: Address port, E: Bit mask
### Function 0x56 -- Sound Duration (SNDDUR)
| _Entry Parameters_
| B: 0x56
| C: Audio Device Unit ID
| HL: Duration
| _Returned Values_
| A: Status (0=OK, else error)
This function sets the duration of the note to be played in milliseconds.
If the duration is set to zero, then the play function will operate in a non-blocking
mode. i.e. a tone will start playing and the play function will return. The tone will
continue to play until the next tone is played. I/O PORT are not compatible and will
not play a note if the duration is zero.
For other values, when a tone is played, it will play for the duration defined in HL
and then return.
`\clearpage`{=latex}
System (SYS)