Hi again,
I published useful information about this modchip on my web page. I hope it will be of help to someone else trying to modchip with ATtiny85.

Hello, so I received my new CD drive, replaced it, and no dice. After a few experiments, I happened to comment out the line with if (hysteresis >= 14) causing it to spam the SCEx messages over and over. And guess what - it worked :D To sum up - it's a standalone Attiny85V @ 16 MHz (PLL clock) with P...

I tried it with the 16 MHz clock, no success. Then I tried with 5V Vcc, no success. Then I removed the attiny and used atmega328 with 16mhz crystal (which should be the same setup as arduino uno). In code I uncommented the define for ARDUINO_BOARD and compiled the .ino file for board "Arduino/G...

Yeah, those are the fuse settings I also used. The CKDIV fuse is unprogrammed meaning that frequency is not divided by 8. Btw. the github page says: ATtiny45: LFUSE 0xE2 HFUSE 0xDF > internal oscillator, full 8Mhz speed (supported, tested) and ATtiny85 should work also - after all, it's just a "...

OK, I disabled debug output, but still no change. As you stated, the attiny is too slow - I thought it was already tested by someone else and working? Anyway, I also have atmegas here, would for example atmega8 be better? I could also give it external crystal to be exactly at 8 MHz... or 16 MHz. And...

I only uncommented the define for ATTINY_X5. Will try disabling debugging, thanks.

//edit: btw. Atmel Studio programming tool allows me to calibrate internal oscillator I wonder if tinkering with that would help?

I got the debug pin working! :D The problem was that I used "Arduino Uno" as board when I compiled the .ino file and so the resulting .hex file was not valid for my attiny. I followed a tutorial to set up arduino ide for a standalone attiny and then I was able to compile and export the cor...

Yes, baud rate of the port was set to 115200. Today I started with repairing the CD drive. I managed to level it up and it now reads audio CDs without problems, even in upright position. Cool, I thought. But it's worse with the game CD-R. The first few times, it didn't load the game and ended up wit...

I measured the 3.5V by placing the DMM leads on Vcc and GND pins of the attiny. Thanks for approving my pinout and soldering places :D Meantime, I found out that the CD I burned yesterday, was full of errors so I bought a cake of new CD-Rs today (made by sony, incidentally :D ) to test with. I made ...

I hoped someone would answer. But since nobody did, I digged into it further. I found out that the pins numbered from zero do not mean pin number on the chip, but PBx port. Like this: PB port / pin / meaning PB0 5 SQCK PB1 6 SUBQ PB2 7 DATA PB4 3 GATE_WFCK - 8 Vcc - 4 GND I downloaded arduino ide, c...

Hello, I have an old PS 1 here. It's a SCPH-1002 PAL version. Board is PU-8. I was looking at the pictures of boards that are in the zip file on github. There are 2 pictures of PU-8 board but mine looks different! :o This forum has ridiculous limitations for attachment pictures. When I downsized the...