SOLVED !! Has anyone ever got the Alvaro Alea Minerva MKII to work ??

[techy]

put both files in the same folder and run the miniconfig from that one , should work

[tommy.sz]

I have both files: miniconfig_bas and I2C_IO_BIN on flp1_ main dir...
I do following things:
turn on QL
tk2_ext
lrespr flp1_I2C_IO_BIN
lrun flp1_miniconfig_bas
Am I missing sth?

[Arleybls]

I have both files: miniconfig_bas and I2C_IO_BIN on flp1_ main dir...
I do following things:
turn on QL
tk2_ext
lrespr flp1_I2C_IO_BIN
lrun flp1_miniconfig_bas
Am I missing sth?

Odds are you have a bad pfc8583 chip.

I have made a tester just to sort this out! Both the arduino sketch and a gerbers are attached.

Enjoy!

[tommy.sz]

Thank you for your efforts!!
I will try another chip.
I will also build your tester although I've already tested the clock on a breadboard to see if the circuit is correct and it worked.
What I haven't tested and I'm not sure how to test is whether the I2C communication circuit based on GAL logic works...
I will try logic analyzer to see SDA and SCL signals but not sure if I'm able to interpret them correctly.
I will also try other copies of the Minerva MKII files in case they got corrupted in the process of transferring to disk.
For sure I let you and the rest of humanity know when it is (hopefully) solved.
Thank you again!

[XorA]

I will try logic analyzer to see SDA and SCL signals but not sure if I'm able to interpret them correctly.

Most logic analysers will decode i2c for you!

[tommy.sz]

OK - status update:
I've managed to get Minerva MKII RTC working in my QL.
I've simply built another module everything worked right from the start
I think 74LS133 IC must have been damaged as I salvaged it from another circuit and used without checking.
So, thank you @techy @aalea @Arleybls for support!

Next problem I'm facing is the following.
In my QL I have the ability to connect base 48KB ROM to 64pin expansion slot (together with 512KB RAM and Trump v3).
I mean, ROM sockets on PCB are empty. It works fine.
However, if I remove EEPROM chip from Minerva MKII and place RTC/GAL module only in ROM socket I have an error as before ("At line 1140;2 format failed" when I try to run miniconfig) which as I understand is problem in I2C communication.
I find it strange beacuse Minerva ROM and Minerva RTC and more or less independent parts and after removing EEPROM, ROMOEL signal will not be used and that should be all.
I will investigate this further, however if anyone has an idea, you're more then welcome

Tomasz