furnace/doc/7-systems/pet.md

# Commodore PET

a computer from 1977 which was leader on US schools back then. subsequently the Apple II took its throne.

maybe no better than a computer terminal, but somebody discovered a way to update the screen at turbo rate - and eventually its sound "chip" (it was nothing more than an 8-bit shift register) was abused as well.

some of these didn't even have sound output, leaving the user to solder in a speaker on their own...

## effects

- `10xx`: **set waveform.**
  - `xx` is a bitmask representing a pattern of on-off pulses. it has nothing to do with wavetable assets, which can't be used by the PET.

## info

this chip uses the [PET](../4-instrument/pet.md) instrument editor.
system doc work 2022-03-22 01:58:07 -04:00			`# Commodore PET`

			`a computer from 1977 which was leader on US schools back then. subsequently the Apple II took its throne.`

Making requested fixes. Fixed those dashes and that pesky semicolon. 2023-06-29 15:42:36 -04:00			`maybe no better than a computer terminal, but somebody discovered a way to update the screen at turbo rate - and eventually its sound "chip" (it was nothing more than an 8-bit shift register) was abused as well.`
system doc work 2022-03-22 01:58:07 -04:00
Many system/instrument doc updates. 2025-07-30 17:00:45 -04:00			`some of these didn't even have sound output, leaving the user to solder in a speaker on their own...`
system doc work 2022-03-22 01:58:07 -04:00
only one header per doc file 2023-09-10 20:34:13 -04:00			`## effects`
system doc work 2022-03-22 01:58:07 -04:00
doc finalization: systems 2023-09-10 02:44:29 -04:00			- `10xx`: set waveform.
Many system/instrument doc updates. 2025-07-30 17:00:45 -04:00			- `xx` is a bitmask representing a pattern of on-off pulses. it has nothing to do with wavetable assets, which can't be used by the PET.
Documentation stuff! New page for the effect list, updates to chanOsc, and links to instrument types from every "system" page. 2023-08-04 12:11:53 -04:00
only one header per doc file 2023-09-10 20:34:13 -04:00			`## info`
Documentation stuff! New page for the effect list, updates to chanOsc, and links to instrument types from every "system" page. 2023-08-04 12:11:53 -04:00
Teensy formatting change. None of these should be list items. It was a bad idea. 2023-08-04 12:38:05 -04:00			`this chip uses the [PET](../4-instrument/pet.md) instrument editor.`