The problems with digital manipulation of analog video are ages old and continues to confuse developers to this day. In the PSX, you program graphics to be displayed according to timings you define (PAL / NTSC, hor. resolution). I believe the PSX has no programmatic control over the number of lines,...

So I suppose the fix is to use root counter 2?

Counters generally require you to have the datasheet that states how they work.
In case Sony never documented them, maybe the general MIPS CPU core datasheet has them.

No no, the GTE is fast and the GPU can deliver. But that CPU core for your basic game loop, that is a dog :p

And if you think you need to limit CPU time spent, then tripple up that demand. The CPU is *slow* ;p

Alternatively, use a clock generator, programmed with an Arduino. It's convoluted but cheap. https://www.ebay.de/itm/Si5351A-I2C-25MHZ-Clock-Generator-Breakout-Board-8KHz-to-160MHz-for-Arduino-DE/162792530068 Edit: And a simpler design is a single ESP32 dev module. Using the audio PLL can directly s...

Hey, I can't help you directly but I'll try to get you attention by flagging my post as spam.
(Sorry for the method, mods! :p)

I had the same issue when registering, by the way.

The logs from both chips look fine, so either the DATA connection isn't correct, or the injection messes up somehow.
Try changing the 3 lines to say inject_SCEX('i') here:
https://github.com/ramapcsx2/PsNee/blob ... e.ino#L409

Perfect, thanks for letting me know. So basically "something is/may be possible" :p The reason I'm asking is that I love the PSX as a very clean source of retro / 15kHz video. I'd like to extend the PSX port of the 240p test suite to include such a drawing area test. This is to help develo...

And is there no way to draw outside these boundaries?
This might not be documented in any SDK.

NITROYUASH and LameGuy64, I'm terribly sorry for asking this here, but you guys seem to know your PSX dev! :p Do you know what the maximum active video area of the console is? It doesn't matter what the image data source is, so a CPU generated chequerboard pattern for example would work. I just need...

Oh yeah, in case you wonder why it says it "will unlock NTSC-J". PsNee can and does unlock the CD controller of NTSC-J consoles, so backups are being recognized. The problem is with the extra BIOS protection only. That prevents booting non Japan region disks from starting through the BIOS ...

It won't work.
Sadly, the NTSC-J bios is very different from the other regions.
It's likely that there isn't a routine in it that can be so easily fooled as the PAL / NTSC-U check.

Paulm probably meant it as a cost comparison, essentially saying that if you have an FPGA board, the price of a Xploder wouldn't be too bad. I agree with him on the psxdev side. Once you have the required hardware, getting homebrew to run isn't very time consuming. You need a virtual machine with th...

Hey, collaboration in PSX hardware projects happens sporadically and randomly. It would be best if you post your tasks / questions as publicly as possible, and then hope that someone takes them up ;p Your project requires knowledge from the most dedicated: Emu devs with hardware research focus. I be...

On those sites you can also find a small app called something like "regionchanger". It allows you to set the licence data on a disk to any region you want.
I tested it and it works.

They don't clone these, I don't think.
The effort for that wouldn't be worth the development costs, even back in 2001 or so when BAM models were current.

But if the drive looks similar to your ACM, no weird plastic remains everywhere and such, then it's fine.

Good call. The BAM is most likely new old stock and it'll work just fine in the 1002 unit. Just make sure to swap the top drive cover, removing the grey one and placing your old black one. If you've modified the pots on the mainboard, revert them to their original position. Just so you know, I've tr...

Good luck to you!

I've thoroughly abused my Exploder and Exploder FX (those names xD), and they can always be restored by some method.

Many 1002 series have an ACM drive (with the metal sled), but that doesn't mean too much. These drives still suffer from friction related material loss and thus, misalignment. They're just not as horrible as the full plastic AAM drives. It's possible that your drive starts working when you slightly ...

Some sample choices a developer can make using the new method, if it works: - console is true NTSC > always use NTSC mode, disregard the region char - console is true PAL > no change, it's still probably best to choose PAL mode, disregard the region char - console is multiformat > this is new: use N...