My Rock-ola 476

[golde...@yahoo.fr]

Basically the Rock-ola 476 is from the electronic point of view totaly
equivalent to the 477

In some previous messages I explained my project to redesign the
"profit setter" board.

Now the project is just finished and the JB works perfectly

At the beginning I took the same idea as Jim and I redesigned a new
board in relation with the software I wanted to write.

I realized the project using the PIC 16F877, my objective was to have
a board to board replacement without any changes in the original
design, except the removal of the original MM5799 chip and its
replacement by a flat cable to my prototype

Also I decided to write the software in "C" language using the
interrupt functionalities for the different input peripherals

These peripheral are, the keyboard, the opto decoder, the scan level,
the coin switches, the home and side (A/B) switches

The home and side switches do'nt need to drive the interrupt. I
started to design a 22V10 GAL to keep track of the other signal and to
generate an interrupt signal

I started to write the software and the first element to debug was the
keyboard

Rapidly I discovered that the transitions in the grid which
multiplexes the keyboard and the display generated some parasitic
signals, so I decided to handle the keyboard by the software which is
pretty much simple to handle the switches rebounds

Remainded the other input signal

The coin switches were rapidly debuged as well the opto decoder which
provide a very clean signal

Regarding the selection memory, I have reserved a 160 bits area, this
is pretty simple in CCS "C" language as the compiler provide a BOOLEAN
variable type. Doing this, the software is able to memorize all the
selection and the algorithm is very simple and fast, this is very
important during the read phase

The handling of the scan level was very straightforward, once the
interrupt is received we keep control until the scan level returns to
the normal position and the magazine returns to the home position

The main problem I encountered was the displays electronic interface.
These displays are VFD (Vacuum Fluorescent Display) devices, the
cathode powered with a 15V negative voltage.
These devices need a positive voltage on the grid and anodes with
respect to the cathode voltage to get something displayed. These
levels are to be interfaced with the TTL level from the
microcontroller

To debug the software I used the MicroChip "In Circuit Debugger" ICD2
(mine is a third party device, pretty much cheaper) integrated in the
MPLAB software. This equipement is connected on the prototype board
and to the PC using USB interface. It can programme the chip, insert
break points at the "C" language level , you can display/modify the
files and special registers, An essential equipement to debug.

Now after couple a weeks of hard job the JukeBox is back to work.

In a near future I expect to have a video showing my job

If you are interested to make your own, I can provide you with more
technical infos regarding the electronics as well as the software

Best regards

Andre

P.S. Be indulgent with my English, French is my mother language

[Jim Hawkridge]

Hi, 

This is great. I'm glad you got this to work and thanks for letting us know how you did it - very interesting. I'd love to see a video when you have it.

Cheers,

Jim

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[JukeboxShopStuart]

Andre,

I would be very interested in using this to repair a Rock Ola Max we have with a dead profit setter. Could you email me the info please?

Kind Regards

Stuart

[Andre FLAGOTHIER]

I can provide you  with the following

  1. the schematic in Eagle format

  2. the layout also in Eagle format.

  3; The ready to program GAL22V10 jedec and source files for CUPL tool

  4. the "C" language source file for the CCS compiler integrated in MPLAB

  5. A link to download the CCS compiler

  6. Some documentation in MSWORD format

 

Email me something at jukef...@yahoo.fr to know your address

 

Regards

 

 

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De : rocko...@googlegroups.com [mailto:rocko...@googlegroups.com] De la part de JukeboxShopStuart
Envoyé : vendredi 6 juillet 2012 12:12
À : rocko...@googlegroups.com
Objet : [Bulk] Re: My Rock-ola 476

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[Dennis Hanley]

Andre,

Is anybody making a replacement for the credit unit on the Max 477 that I can buy?

I think my board has gone belly up.

Regards, Dennis

[timothy jones]

did you ever figure it out i to have a problem i think caused by bad board

[Dennis Hanley]

Andre,

I took the profit setter board back to the shop that sold me the Juke.

He swopped out some I.Cs on the board until it worked.

He didn’t charge me anything.

I then sold it and made a digital Jukebox with a touch screen in a Wurlitzer style cabinet.

Lots of flashing lights.

This is the 2^nd juke that I’ve had nothing but trouble with.

No more Vinyl Jukes for me.

I’m into refurbishing the old 60’s autochange record players now.

Regards,

Dennis

 

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[Dennis Hanley]

Sorry Tim,

I should have addressed it to you.

Dennis

 

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From: rocko...@googlegroups.com [mailto:rocko...@googlegroups.com] On Behalf Of timothy jones
Sent: 18 May 2014 01:26
To: rocko...@googlegroups.com
Subject: Re: My Rock-ola 476

 

did you ever figure it out i to have a problem i think caused by bad board

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[Norman Macrae]

Is this offer still available -

"1. the schematic in Eagle format

  2. the layout also in Eagle format.

  3; The ready to program GAL22V10 jedec and source files for CUPL tool

  4. the "C" language source file for the CCS compiler integrated in MPLAB

  5. A link to download the CCS compiler

  6. Some documentation in MSWORD format"

If so, I would be very grateful for a copy.

Thanks,  Norman.

On Friday, 16 December 2011 17:28:14 UTC, golde...@yahoo.fr wrote:

[Norman Macrae]

I don't appear to have had any luck getting hold of Andre!

Did anyone else get this info and could now pass it on?  JukeboxShop Stuart, maybe??

Thanks,   Norman.

On Friday, 16 December 2011 17:28:14 UTC, golde...@yahoo.fr wrote: