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SN76489: Renamed variable 'pitch' to 'period'

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This commit is contained in:
Dean Netherton
2020-04-28 20:32:09 +10:00
parent 9cdbc5b981
commit c51fa1fcae
5 changed files with 41 additions and 41 deletions
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16
Source/Doc/Architecture.md
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@@ -1324,20 +1324,20 @@ Note that not all sounds chips implement 256 volume levels. The
driver will scale the volume to the closest possible level the
chip provides.
### Function 0x52 -- Sound Pitch (SNDPIT)
### Function 0x52 -- Sound period (SNDPRD)
| _Entry Parameters_
| B: 0x52
| C: Audio Device Unit ID
| HL: Pitch (0000=lowest note, FFFF=highest note)
| HL: period (0000=lowest note, FFFF=highest note)
| _Returned Values_
| A: Status (0=OK, else error)
This function sets the sound chip pitch parameter. The pitch will
This function sets the sound chip period parameter. The period will
be applied when the next SNDPLAY function is invoked.
The pitch value is a driver specific value. To play standardized
The period value is a driver specific value. To play standardized
notes, use the SNDNOTE function.
### Function 0x53 -- Sound Note (SNDNOTE)
@@ -1350,7 +1350,7 @@ notes, use the SNDNOTE function.
| _Returned Values_
| A: Status (0=OK, else error)
This function sets the sound chip pitch parameter according to
This function sets the sound chip period parameter according to
standardized notes.
The value corresponds to standard musical notes. The value allows
@@ -1370,7 +1370,7 @@ the maximum supported value, and it corresponds to note C7.
| _Returned Values_
| A: Status (0=OK, else error)
This function applies the previously specified volume and pitch by
This function applies the previously specified volume and period by
programming the sound chip with the appropriate values. The values
are applied to the specified channel of the chip.
@@ -1418,7 +1418,7 @@ key aspects of the specific Audio Device.
| H: 0
| L: Current volume setting
#### SNDQUERY Subfunction 0x03 -- Get current pitch setting (SNDQ_PITCH)
#### SNDQUERY Subfunction 0x03 -- Get current period setting (SNDQ_PERIOD)
| _Entry Parameters_
| B: 0x54
@@ -1426,7 +1426,7 @@ key aspects of the specific Audio Device.
| _Returned Values_
| A: Status (0=OK, else error)
| HL: Current pitch setting
| HL: Current period setting
#### SNDQUERY Subfunction 0x04 -- Get device details (SNDQ_DEV)