This keyboard is in really great shape with original box, vinyl cover, and dust cloth! Everything works great! This keyboard has such a great vintage sound, I hate to part with it, it's so much fun!!! main features:
49 fullsize keys
built-in big speaker (with reasonable bass)
main voice polyphony 8 notes
chord polyphony 12 notes
volume knob
separate accompaniment/ melody volume balance knob
tempo knob
16 semi- OBS preset rhythms {rock, slow rock1, swing, bossanova, march1, waltz, rhumba, habanera | rock'n'roll, slow waltz, shuffle, samba, march2, rock waltz, beguine, mambo} (selected through 8 locking button switches + "variation" bank switch)
14 OBS preset sounds {organ, flute, oboe, clarinet, trumpet, violin, cello, piano, harpsichord, celesta, accordion, electric piano, funny, frog} (buttons with each a red status LED)
"casio auto chord" switch {off, fingered, on} (manual chord mode with rhythm off)
"chord" switch {rhythmic, continuous}
chord memory switch (chord stays held after releasing key when on)
"octave down" switch (transposes main voice 1 octave down, works only in chord mode).
rhythm "fill-in" and synchro buttons
switches for vibrato, vibrato delay, sustain, hold
main voice timbres based on 2 mixed multipulse squarewave tones with different digital envelopes, those are differently low pass filtered through capacitors. Vibrato modulates CPU clock oscillator.
analogue percussion {base, snare, low tom, high tom, open cymbal, close cymbal, woodblock} which uses transistor noise for cymbal and snare
complex multi- chip hardware:
main CPU= "NEC D773G, K05266, Japan" (64 pin zigzag DIL)
accompaniment CPU(?)= "NEC D8049C, M0Z076-049, 084, Japan" (40 pin DIL)
IC "NEC D8243C, E01039-005, Japan" (24 pin DIL)
ROM(?) "Texas Instruments TMS3615NS, MBS [triangle] 8048" (28 pin DIL, socketed)
IC "AMD(?) AM 6012PC, 8050FM" (20 pin DIL)
tuning knob
mains operated
jacks for headphone, line out, aux in, volume pedal, sustain pedal, foot switch