Check my post a few pages back for the pu-22 diagram, its for the micro but the ps points are the same. also reading back through the thread it states to have no boot loader or power on before is this certain models?? as the pu22 and pm41 I have both pals boot fine using a boot loader powered by th...

You obviously spent some time on this now. Why not get rid of all the modchip action and reduce the code to just the BIOS patch. Then you can change pins easily and maybe even have ICSP, so the chip can stay installed when you debug. I tried looking for my Attiny45 the other day, but couldn't find ...

These are blank attiny's I bought, and i'm programming the exported hex with a tl866 programmer (supports hvspi), so there is no bootloader involved and the fuses are: LFUSE 0xE2 HFUSE 0x5F, so boot should be fine...

Frietman did implement bios patching on the attiny (in psnee v6). Although it seems like a crude implementation, from what I read, it was functional... maybe these (timings) should be reverted for the attiny implementation.. From a first glance at the code, he used less delays overall... I came acro...

tried the suggested delays, but still no bios patching going on. ohwell, atleast CDR is working, and this is a fun way of getting into AVR's. Plus while testing I found that all the sony branded Taiyo yuden CDR backups (dating from '99 -'00) still boot just fine (even better then some of the origina...

You should get around 60Hz, right. Fuses look correct (using a fuse calculator). Did you undefine (remove) #define USINGSOFTWARESERIAL ? And did you define APPLY_PSONE_PAL_BIOS_PATCH ? Otherwise, the code snipped looks fine with the correct pins on the correct aliases. I did not undefine USINGSOFTW...

Nice :) If the patch works, the video output will indeed be NTSC 443 and the startup screen will be larger vertically. You can try to repair your drive. Usually it needs a good cleaning and regrease with white lithium paste. The diode itself is rarely bad (only 1 out of ~20 is worn out / my experie...

I went ahead and compiled the code above, and am able the confirm that the TL866A/CS programmer is able to program the attiny with HVSP. So any settings to the fuses can be reverted. unfortunately, my test PSone (SCPH-102) has a bad laser. I had to adjust the pot to even get original pal games to bo...

I did have a look at the code, and was actually thinking of using the reset and debug pins. I don't think debug has any real purpous on the attiny anyway as I see this more like a final install, rather then a development solution. The thing is, I see the code is in place, but i have no real experian...

Any plans/progress on supporting the bios patch on the attiny chips?