Need Pinout of Old MHS Music Chip

Z

Zephinilium

Guest
I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks
 
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
<platt.eric@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks
Click to expand...
It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:
http://ecee.colorado.edu/~mcclurel/p8051ds.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Click to expand...
Excellent. That should help greatly. I'll study it.

BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).

ECP
 
On Sun, 7 Feb 2010 15:47:40 -0800 (PST), Zephinilium
<platt.eric@gmail.com> put finger to keyboard and composed:

On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf

BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).
Click to expand...
This should help.

PC Gameport+MIDI pinout:
http://pinouts.ru/Inputs/GameportPCMidi_pinout.shtml

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Feb 7, 5:24 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 15:47:40 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:





On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf
BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).

This should help.

PC Gameport+MIDI pinout:http://pinouts.ru/Inputs/GameportPCMidi_pinout.shtml

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Click to expand...
I'll take that information into account. Thanks.
BTW I don't know if you noticed, but it has a dedicated MIDI port
already. Here are the ports, if it clarifies the situation any:
http://www.macdood.com/electronics/keyboard_ports_33p.jpg

-ECP
 
On Sun, 7 Feb 2010 18:05:02 -0800 (PST), Zephinilium
<platt.eric@gmail.com> put finger to keyboard and composed:

On Feb 7, 5:24 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 15:47:40 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf
BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).

This should help.

PC Gameport+MIDI pinout:
http://pinouts.ru/Inputs/GameportPCMidi_pinout.shtml

I'll take that information into account. Thanks.
BTW I don't know if you noticed, but it has a dedicated MIDI port
already. Here are the ports, if it clarifies the situation any:
http://www.macdood.com/electronics/keyboard_ports_33p.jpg

-ECP
Click to expand...
I don't understand the need for the microcontroller, but then I'm not
a musician.

FYI, here is a MIDI kit:
http://www.siliconchip.com.au/cms/A_101116/printArticle.html

http://us1.webpublications.com.au/static/images/articles/i1011/101116_10mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_11mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_2mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_8mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_9mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_4mg.jpg
http://us1.webpublications.com.au/static/images/articles/i1011/101116_7mg.jpg

I use the abovementioned kit to connect an old soundcard to an old
Radioshack keyboard.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Feb 7, 9:15 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 18:05:02 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:





On Feb 7, 5:24 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 15:47:40 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board.
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf
BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).

This should help.

PC Gameport+MIDI pinout:
http://pinouts.ru/Inputs/GameportPCMidi_pinout.shtml
I'll take that information into account. Thanks.
BTW I don't know if you noticed, but it has a dedicated MIDI port
already. Here are the ports, if it clarifies the situation any:
http://www.macdood.com/electronics/keyboard_ports_33p.jpg

-ECP

I don't understand the need for the microcontroller, but then I'm not
a musician.

FYI, here is a MIDI kit:http://www.siliconchip.com.au/cms/A_101116/printArticle.html

http://us1.webpublications.com.au/static/images/articles/i1011/101116...http://us1.webpublications.com.au/static/images/articles/i1011/101116...http://us1.webpublications.com.au/static/images/articles/i1011/101116...http://us1.webpublications.com.au/static/images/articles/i1011/101116...http://us1..webpublications.com.au/static/images/articles/i1011/101116...http://us1.webpublications.com.au/static/images/articles/i1011/101116...http://us1.webpublications.com.au/static/images/articles/i1011/101116...

I use the abovementioned kit to connect an old soundcard to an old
Radioshack keyboard.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Click to expand...
That's cool, but I'm using Macs, and have a MIDI to USB adapter
already.
 
On Feb 7, 9:20 pm, Zephinilium <platt.e...@gmail.com> wrote:
On Feb 7, 9:15 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:





On Sun, 7 Feb 2010 18:05:02 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

On Feb 7, 5:24 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 15:47:40 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

On Feb 7, 3:29 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:
On Sun, 7 Feb 2010 14:01:37 -0800 (PST), Zephinilium
platt.e...@gmail.com> put finger to keyboard and composed:

I have this pc board out of a keyboard made by Think! Software. I
don't have any cables or information on it. I just want to use the
MIDI keyboard function, so need to hook up power to the pc board..
Couldn't find pinouts anywhere for the main chip. You can see it
here:

http://www.macdood.com/electronics/keyboard_pcbrd_33p.jpg

Thanks

It's an 80C51 uC with 4K x8 mask ROM.

This is a Philips version:http://ecee.colorado.edu/~mcclurel/p8051ds.pdf
BTW, the "J1" connector on the left in the photo is for a foot switch,
not a power connector. I think I read somewhere that it gets power
from the computer connection (P2).

This should help.

PC Gameport+MIDI pinout:
http://pinouts.ru/Inputs/GameportPCMidi_pinout.shtml
I'll take that information into account. Thanks.
BTW I don't know if you noticed, but it has a dedicated MIDI port
already. Here are the ports, if it clarifies the situation any:
http://www.macdood.com/electronics/keyboard_ports_33p.jpg

-ECP

I don't understand the need for the microcontroller, but then I'm not
a musician.

FYI, here is a MIDI kit:http://www.siliconchip.com.au/cms/A_101116/printArticle.html

http://us1.webpublications.com.au/static/images/articles/i1011/101116.......

I use the abovementioned kit to connect an old soundcard to an old
Radioshack keyboard.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

That's cool, but I'm using Macs, and have a MIDI to USB adapter
already.
Click to expand...
Hooked up a power supply to GND and pin 8. Didn't work. Dont' know if
it's related to the fact that I accidently broke surface-mount
resister R2. What is the value of R2? It says "472" on it. Is that
just ohms, or K ohms, or what?
 
On Wed, 10 Feb 2010 15:58:30 -0800 (PST), Zephinilium
<platt.eric@gmail.com> wrote:


Hooked up a power supply to GND and pin 8. Didn't work. Dont' know if
it's related to the fact that I accidently broke surface-mount
resister R2. What is the value of R2? It says "472" on it. Is that
just ohms, or K ohms, or what?
Click to expand...
Markings on surface mount resistors work just like the colour code, so
that will be 4, 7, and two 0s, or 4700 ohms, or 4K7.


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
 
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