WonderSwan

a handheld console released only in Japan by Bandai, designed by the same people behind Game Boy and Virtual Boy.
for this reason it has lots of similar elements from those two systems in the sound department.

it has 4 wavetable channels. some of them have additional capabilities:

• the second channel could play samples
• the third one has hardware sweep
• the fourth one also does noise

effects

• 10xx: change wave.
• 11xx: setup noise mode. channel 4 only.
• 0: disable.
• 1-8: enable and set length.
• 12xx: setup sweep period. channel 3 only.
• 0: disable.
• 1-32: enable and set period.
• 13xx: setup sweep amount. channel 3 only.
• 00 to 7F for 0 to 127.
• 80 to FF for -128 to -1.
• 20xx: set internal speaker loudness.
• 0-1: 100% (default).
• 2-3: 200%.
• 4-7: 400%.
• 8: 800%.
• has no effect when "Headphone output" is on. see "chip config" below.

info

this chip uses the WonderSwan instrument editor.

chip config

the following option is available in the Chip Manager window:

• Headphone output: enables stereo 16-bit output. if disabled, the internal speaker's 8-bit mono output is used. default is on.

channel status

the following icons are displayed when channel status is enabled in the pattern view:

• PCM mode (channel 2):
• off
• on
• sweep (channel 3):
• disabled
• enabled
• noise mode (channel 4):
• off
• on