I would search for broken solder points. Visually inspect the through-hole solder points on the PCB bottom side. And for SMD chips, try to push down the CPU, Main RAM, BIOS ROM chips, and check if things get better (or worse) when booting up while pushing down those chips. As far as I remember, the ...

What happens if you push the reset button while it hangs with black screen? That's just the plain console, without any expansion carts attached? Oh, and instantly switching it back on sounds like bad practice, I would wait 1-2 seconds betswen power cycles (just in case you literally meant "inst...

A modchip normally can't damage anything. I'd rather assume that you did have (or still have) produced a shortcut somewhere, wihich is 99% harmless and easy to fix, unless you had shortcut power supply signals. I guees the yellow diamond screen should come up even without cdrom drive attached. At th...

That's not a "pin", it's called "test point", and it isn't needed, and everything should work fine without it. If you want to wire a modchip to that signal, that signal is called WFCK, and there are lots of options for doing that: Scratch off the solder-stop on the PCB wire, use ...

Cool, glad that it's working (or bypassed). If you want to replace he fuse someday, there are schematics (with parts lists at the end of the document) for several older/newer PSX mainboards (see the Downloads section on top of the forum page). From what I've learned recently, only the rating in Ampe...

If you think that it's a fuse then you do need a multimeter to check if the fuse is broken, and if so, yes, that would require soldering. But, the controller and memory card are using the exact same signals and supply voltages, so it's pretty much implossible that one works & the other doesn't w...

I've looked through the files on the Programmer Tool CDROMs. And, yes, it's rather difficult to extract the BIOS ROM-images from there. There are at least two different file formats (neither one being raw ROM-images), and different BIOSes for different purposes, and different CDROM versions (which h...

Okay, I am impressed - I would have thought that it's hopeless to get that working on win2k. I've been looking through some of the older/newer SDK "Programmer Tool" CDROMs. And couldn't even find any dtl-2500 drivers on those discs: There is something called PSSN\WINDEBUG\H2700\*.VXD - and...

I've helped to install a 6 kW photovoltaik PV system with 18 panels. The PV components are a bit bigger than in DIY projects for digital electronics, and I didn't have any experience with PV, but it's been actually quite simple (and saved a lot of money). The whole thing consists of two strings, one...

Hmm, I just tried to send some constructive or motivating feedback, as far as possible without seeing your unreleased open source code. But if you want to make it faster, you'll have to do that yourself, I could only tell you how. Usain bolt can run 100 meters in just 9.58 seconds, can you ? Yes, pr...

The FTDI specs say that the chip could support 1Mbyte/s, so it looks as if you are doing something wrong. Are you executing your program code directly from ROM, in an uncached memory area? That would drop the CPU speed from 33Mhz to somewhere below 500kHz. Or are you reading/writing lots of USB cont...

Orion_ wrote: ↑May 22nd, 2024, 6:26 pm I thought about it because I saw some projects doing this for 8bits computers, but we are talking of a 33mhz RISC cpu here

The 33MHz is for the cache, the external bus for the ROM is less than 2MHz. About same as many 8bit computers.

I'm using an FTDI USB chip FT245, an some 74 logic chip. Only an USB FIFO, and some logic, without any microprocessor? And the photo looks as if you have a huge eprom or something similar...? I'm not skilled enough to do fpga or stuff like that, this is my first real electronic project. Me neither,...

Nice, such a thing is somehow missing for people without parallel ports. What chipset are you using? Minimum would be a single chip that could both simulate a boot rom stub and manage the usb transfers. Do you have a reset signal implemented for automatically rebooting the console on each upload? 83...

What happened? From what I've gathered, the Yaroze consoles were sold via mail order, with only 1000 consoles sold in europe, but more were sold in usa and japan. Apparently Sony did then produce 1000 cdroms with yaroze games, and mailed them to the european Yaroze owners, and people in usa or japa...

The WIN32 version has found a new way to make it won't work: v0.265 now says missing KERNEL32.DLL:GetModuleHandleExW. For Zstandard , a sample CHD file nice, like those posted above for other methods. All those extra compression methods are getting quite annoying (but maybe I'll like it better if it...

Until today, the oldest known LibCrypt'ed CDROM appears to have been MediEvil. But there's another older title... http://redump.org/disc/45854/ SLED-01340 (EXE date 03 Jun 1998) Net Yaroze Demo Disc (EUR) http://redump.org/disc/592/ SCES-00311 (EXE date 05 Aug 1998) MediEvil (EUR) The Yaroze demo di...

Thanks. In general, COFF could be a raw .EXE file, or a linker .OBJ file. I don't know how the Yaroze files fit in though... if you remember how it works, maybe you could answer some questions: Basically, you load (and execute?) the "libps.exe" file, and then load and execute the "yar...

The PSX-SDK Programmer Tool CDROM contains some COFF files, for example CLEANMEM extended MIPS COFF (with 38h-byte optional "a.out" header) METROWER\*.O extended MIPS COFF (with 38h-byte optional "a.out" header, and big-endian headers) EMU387 standard I386 COFF (with 1Ch-byte opt...

To make it a bit more clear what you are talking about, here is what you had posted in the other thread: With the great Pikuma tutorial for PS dev i setup my PS Dev PC new. Im looking to use the h2500 with the best option for IDE and debugger. ATM i using the Code Warrior release 5 with update DECI ...