Question about the Casio PT-380

[itsJoel]

So a few ago I picked up this neat little thing for 5$. Very good condition but without a ROM pack. Since this model has a slot for it I ordered one of those for the sake of making a more "complete" set.

Now, this model also has a microphone holder and input jack. Is there anyone that knows if casio made their own branded microphones for these models as well? If so, I would like to find one!

Any insight is appreciated as always!

Joel

[Chas]

That's a Casio model I have never seen before! 

 

There's some elements of the Casio RAP-1 Rapman in your PT's control layout, and the RAP-1 did actually come with its own microphone (I'm not sure if it had Casio written on it though). Problem is, most of them got separated over time and it's very hard to find a RAP-1 complete with original microphone. 

 

Another Casio that came with a microphone is the VA-10 "Voice Arranger". Those are rare and don't come up for sale much, plus similar to the RAP-1, unless you find one still boxed complete with accessories (expensive and collectible), they too are often missing the microphone. 

 

You could probably find a cheap generic mic that would work and fit that stand. The mics that come with the cheap and nasty kids keyboards would suffice, and they'll probably be fine as they're just a basic condenser type mic. I bought one of these cheap and awful keyboards for a project, $14.99 including shipping, and it came with the microphone, power adapter and charging cable!

 

It truly was an awful keyboard, and the mic was probably the best part!

[CYBERYOGI =CO=Windler]

The PT-380 seems to be a variant of Casio PT-88.

 

The CPU of my PT-88 is "OKI M6521-02, 032002, Japan" (60 pin SMD). What is yours?

 

While the PT-88 is only 2 note polyphonic (by omitted keyboard matrix diodes), PT-380 seems to have 4-note polyphony. Likely this is switched by an additional matrix diode somewhere (or is the CPU software number different?).

pinout M6521

The "OKI M6521-xx" CPU (pins count anticlockwise, xx = software number of internal ROM) is a 60 pin SMD variant of the M6387 that (unlike older Casio keyboards) supports a matrix of key lighting LEDs without the need of driver transistors. Each LED is wired from an LY to an LX pin. The pins 51..58 can control the ROM-Pack port. Without a ROM-Pack connected, the key lighting apparently uses demo songs from its internal ROM. Like M6387 it is clocked at 21.725 MHz. 

The versions of "OKI M6521-xx" ("xx" = software number of internal ROM) differ in demo songs, rhythms and sound set.
 

software number	hardware class	notes & features
02	PT-88	32 keys, key lighting, 100 sounds, 12 rhythms, 5 drumpads, rom-pack, 4 songs
06	RAP-1	30 sounds, 25 rhythms implemented as songs
10	ML-1	25 sounds, 12 rhythms, 10 songs (need no lit sharp keys)
11	ML-2	like 11 with changed 10 songs

 

This pinout was concluded from the service manual of ML-2 (which uses no ROM-Pack), SK-8 service manual and wiring of the PT-88 PCB.
 

pin	name	purpose
1	LY1	led matrix out
2	LY2	led matrix out
3	LY3	led matrix out
4	LY4	led matrix out
5	LY5	led matrix out
6	LY6	led matrix out
7	LY7	led matrix out
8	LVDD1	led supply voltage +5V
9	LGND2	led ground
10	LX0	supply voltage +5V
11	LX1	led matrix out
12	LX2	led matrix out
13	LX3	led matrix out
14	LX4	led matrix out | NC
15	LX5	led matrix out | NC
16	LX6	led matrix out | NC
17	LX7	led matrix out | NC
18	LVDD2	led supply voltage +5V
19	GND2	ground
20	COSI	crystal in | clock in (21.725 MHz)
21	COSO	crystal out
22	VDD	supply voltage +5V
23	GND1	ground
24	TEST1	(wired to GND) | ?
25	TEST2	(wired to GND) | ?
26	TEST3	(wired to GND) | ?
27	/RESET	reset
28	AVDD	analogue supply voltage +5V
29	OUT	sound out
30	AGND	analogue ground
31	KI0	key matrix in
32	KI1	key matrix in
33	KI2	key matrix in
34	KI3	key matrix in
35	KI4	key matrix in
36	KI5	key matrix in
37	KI6	key matrix in
38	KI7	key matrix in
39	KO0	key matrix out
40	KO1	key matrix out
41	KO2	key matrix out
42	KO3	key matrix out
43	KO4	key matrix out
44	KO5	key matrix out
45	KO6	key matrix out
46	KO7	key matrix out
47	KO8	key matrix out | NC
48	KO9	key matrix out | NC
49	KO10	key matrix out | NC
50	KO11	key matrix out | NC
51	D4	rom pack bus
52	D3	rom pack bus
53	D2	rom pack bus
54	D1	rom pack bus
55	OP	rom pack /adress data
56	ø2	rom pack clock2
57	ø1	rom pack clock1
58	CE	rom pack enable
59	LGND1	led ground
60	LY0	led matrix out