5E01

A fantasy sound chip created by Euly, based on the Ricoh 2A03 in the NES, with some improvements:

A 37.5% duty cycle
32 noise pitches instead of 16
Triangle channel becomes a wave channel, with four available waveforms: triangle, saw, sine and square

Effects

Effect	Description
`11xx`	Write to delta modulation counter. Range is `00` to `7F`. This may be used to attenuate the triangle and noise channels; at `7F`, they will be at about 57% volume. Will not work if a sample is playing.
`12xx`	Set duty cycle/noise mode/waveform of channel. For pulse channels (0-3): `0` = 12.5%, `1` = 25%, `2` = 37.5%, `3` = 50%. For noise channel: `0` = long (15-bit LFSR), `1` = short (9-bit LFSR). For wave channel: `0` = triangle, `1` = saw, `2` = square, `3` = sine.
`13xy`	Setup sweep up. `x` is the time, `y` is the shift. Set to `0` to disable.
`14xy`	Setup sweep down. `x` is the time, `y` is the shift. Set to `0` to disable.
`15xx`	Set envelope mode (pulse and noise channels only). `0` = envelope + length counter, `1` = length counter, `2` = looping envelope, `3` = constant volume (default).
`16xx`	Set length counter. This will trigger phase reset.
`17xx`	Set frame counter mode. `0` = 4-step, `1` = 5-step.
`18xx`	Set PCM channel mode. `00` = PCM (software), `01` = DPCM (hardware). In DPCM mode, samples will sound muffled and have limited pitch options.
`19xx`	Set triangle linear counter. `00` to `7F` set the counter, `80` and higher halt it.
`20xx`	Set DPCM frequency. Only works in DPCM mode.

This chip uses the NES instrument editor.

You may need to apply a phase reset (using the macro) to make the envelope effective.

The following options are available in the Chip Manager window:

Clock rate: Sets the rate at which the chip will run
DPCM channel mode: Choose between DPCM (default 1-bit samples) or PCM (crispier samples but uses more CPU time in console)

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