It depends on the 'mode' of the hex file for the PIC.
My programmer can only program PICs in 'low voltage mode'.
PIC programs for older LISY versions are in 'high voltage mode' so during the programming the mode changes.
After that the programmer can not access the PIC anymore, hence the verify error.

I will have a look to my 'old versions' and create a list what hex files are working with my programmer and what not.
The current pop bumper driver program is a 'high voltage mode' version.
It is still on my todo list to create a low voltage version ... too many things in parallel, sorry.

If you don't mind when it works sometimes only at the second try you can go for a cheap China Pickit3 clone
and use the free Microchip Software tools ( MPLAB X IDE which includes MPLAB X IPE -> programming environment)

e.g. this one: https://de.aliexpress.com/item/32844907068.html

You can do a 'right click -> save as', but as explained this version will not work with my picprogrammer.

I made a new version in LVP mode which should work:
http://www.flipperkeller.de/lisy/PBDB_1_3.zip

HOWEVER YOU NEED TO DO A SMALL MODIFICATION TO THE PCB.

Connect pin7 of the PIC to Gnd (see picture below).

Without this mod the input on that pin 'floats' which will move the PIC sometimes
to LVP programming mode, eventually resulting in a stuck solenoid!

Please let me know if it works for you

pasted_image (resized).png

IMHO the one posted by Hockymutt is a version created by 'Amoksolderer' together with his APC project, not the one from baumfalk.net page.
but I could be wrong. Here is the APC Thread: https://pinside.com/pinball/forum/topic/arduino-pinball-controller/page/3
You may find something there ..
hope that helps

Yes, will not hurt with the High Voltage mode to set that pin to GND.
This is the PGM pin used in low voltage mode only.

start with no jumpers at all which is the default setting, , this should be same behaviour as with the original boards.
Default pulse time is 40ms

OK, need to dig into that, thx for testing

Bally or Gottlieb Displays?

can you please do another try by changing the setting to 200KHz?
so the line will look like that:
dtparam=i2c_arm=on,i2c_arm_baudrate=200000

Good point! You are right in the picture I placed the friction on the wrong side.
I will make a new version of the board, include the 'pin7 grounding' and make a new picture.

If you have any other suggestions for the next board revision let ne know!

Just follow the order instructions for JLC preassembly on my side: https://www.lisy.dev/pcbs.html
Watch carefully if all components are available and let me know if not, JLC does change internal library sometimes.

Latest versions have very few components to add.
For Gottlieb it is only the LED displays and to set a 3 pin-header with a jumper or solder a wire for fixed setting.
For Bally some more headers, the molex connector and a 100uF radial capacitor is needed.

NOTE: I got some feedback that with Bally Displays Version 1.0 together with a original Bally MPU sometimes
there is a ghosting. I'm investigating on this. Tests with BallyFA, LISY and Stern MPU are alle successfull so far.

I can reproduce it in my own Elektra. With my BallyFA MPU all works well, but with the original Bally MPU I have ghosting.

One of the users has made a video of his Spectrum

Interistingly the effect pops up only when 5 or more LED displays are connected, with 4 displays all is well!?

You talk about open circuits, any specific hint/example where to look in specific?

Good point, usually I'm doing that too with all my boards, just forgot it this time.
I have updated GoPOP80 to version 1.2 now, cap included.

Agree it is easier to do it this way. Can I use your pictures on lisy.dev?

Its more or less a pull-down 'resistor', to give the pin a defined level. In LVP mode with this PIC over this pin the programmer does 'signaling'
that he wants to programm the chip. With a floating input here sometimes the chip will go into programming mode after start.
So it does not hurt with HVP mode to have him grounded

With LVP mode you can programm the chips 'on board'. Thats what I'm doing with LISY. But you loose one input ( MCLR pin1 )
which is used for programming too and need to look for these open inputs and two other pins (RB7&RB6) in your design.
With HVP mode you can use all pins but need a special programmer.

I used my BallyFA with a version where I disabled the blanking in software. Same effect, so its definitly a blanking load problem.

I have an 10K resistor to GND in seriell with a diode on each Display connected to the blanking signal.
This is the extra load and looks like that some MPUs are not willing to drive that much.
( I build an easy OR gate with the resistor and the diode for the dimmer functionality)
Will change it to a standard OR gate chip, making the 10K resistor obsolete.

Thanks for the hint, will let you know if the design change worked.

Thats because these old rom images do not store the soundsthemself but only the instructions how to create them.

I used the pinmame (on windows) method in the past as mentioned by koji, but I think a recording from an original board will create better results.
Maybe anyone with a BH SB can give it a try?

can you explain in more detail, did you forgot something or is there something missing on the PCB?

Not sure if I understood right, you mean marking the LEDs needed for credit and/or unit displays for the 6 digit variant?

ah, you was talking about the LCD display, where I was talking about the bally LED displays, OK,
good suggestion, I put it on my 'list'

can hzave a look, but can you check the link? I get a 404 Error

NEWS ABOUT THE BALLY DISPLAYS
we did some further testing and it looks like with changing the R15 10K resistor to a 22K the ghosting is vanished.
I have updated the BOM accordingly. In case you already ordered your PCBs see below what you need to change

pasted_image (resized).png

Looks like not many people do using LISY35 with Stern games, there might be still bugs.
So any feedback from other Stern users would be helpfull!
I will look into the performance problem, don't think that it is only a problem of the clock cycle (throttle) value.

For the freeplay option, it needs to be activated by S1, did you do that?

You need one of my 6digit LED displays for the match/credit window, the position of the digit of the 7digit display will not fit.