Search found 577 matches
- Yesterday, 11:42 pm
- Forum: Hardware
- Topic: Chip marked "112 732" on PU-18 side B
- Replies: 3
- Views: 82
Re: Chip marked "112 732" on PU-18 side B
Yes, test points aren't needed for anything. For what that chip is, when searching for "16pin" in psxspx, it seems to match this: GATE is IC706.Pin7/10 (16pin "118" (uPC5023GR-118) ;PU-18 .. PU-20 But there it's called "118", and the barely visible part number on your p...
- July 9th, 2024, 8:51 am
- Forum: Hardware
- Topic: PU22 board works fine from cold boot, won't restart after use.
- Replies: 3
- Views: 418
Re: PU22 board works fine from cold boot, won't restart after use.
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 ...
- July 7th, 2024, 10:34 pm
- Forum: Hardware
- Topic: PU22 board works fine from cold boot, won't restart after use.
- Replies: 3
- Views: 418
Re: PU22 board works fine from cold boot, won't restart after use.
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...
- June 14th, 2024, 9:55 am
- Forum: Hardware
- Topic: help with raised pin on pu-23
- Replies: 3
- Views: 1731
Re: help with raised pin on pu-23
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...
- June 14th, 2024, 7:05 am
- Forum: Hardware
- Topic: help with raised pin on pu-23
- Replies: 3
- Views: 1731
Re: help with raised pin on pu-23
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 ...
- June 11th, 2024, 7:07 am
- Forum: Hardware
- Topic: PS1 won't read memory card, might be a fuse
- Replies: 4
- Views: 2047
Re: PS1 won't read memory card, might be a fuse
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...
- June 7th, 2024, 9:04 am
- Forum: Hardware
- Topic: PS1 won't read memory card, might be a fuse
- Replies: 4
- Views: 2047
Re: PS1 won't read memory card, might be a fuse
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...
- June 1st, 2024, 8:08 am
- Forum: Input/Output
- Topic: H2500 SN Bios Flash
- Replies: 5
- Views: 5439
Re: H2500 SN Bios Flash
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...
- June 1st, 2024, 7:10 am
- Forum: Hardware
- Topic: DTL-H2x00 on Win2k/XP ?!?
- Replies: 3
- Views: 5772
Re: DTL-H2x00 on Win2k/XP ?!?
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...
- May 28th, 2024, 1:58 am
- Forum: Miscellaneous & Off Topic
- Topic: I have helped to install a PV solar system
- Replies: 0
- Views: 1661
I have helped to install a PV solar system
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...
- May 26th, 2024, 1:01 pm
- Forum: Work Logs & Projects
- Topic: USB Development Cartridge for PS1
- Replies: 20
- Views: 10369
Re: USB Development Cartridge for PS1
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...
- May 25th, 2024, 3:12 am
- Forum: Work Logs & Projects
- Topic: USB Development Cartridge for PS1
- Replies: 20
- Views: 10369
Re: USB Development Cartridge for PS1
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...
- May 22nd, 2024, 11:36 pm
- Forum: Work Logs & Projects
- Topic: USB Development Cartridge for PS1
- Replies: 20
- Views: 10369
- May 22nd, 2024, 1:55 pm
- Forum: Work Logs & Projects
- Topic: USB Development Cartridge for PS1
- Replies: 20
- Views: 10369
Re: USB Development Cartridge for PS1
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,...
- May 22nd, 2024, 4:10 am
- Forum: Work Logs & Projects
- Topic: USB Development Cartridge for PS1
- Replies: 20
- Views: 10369
Re: USB Development Cartridge for PS1
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...
- May 10th, 2024, 7:11 am
- Forum: CD-ROM
- Topic: First LibCrypt CDROM Discovered!
- Replies: 6
- Views: 4701
Re: First LibCrypt CDROM Discovered!
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...
- May 9th, 2024, 2:29 am
- Forum: Research
- Topic: CHD Disk Image Format (MAME)
- Replies: 75
- Views: 112470
Re: CHD Disk Image Format (MAME)
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...
- May 8th, 2024, 11:22 am
- Forum: CD-ROM
- Topic: First LibCrypt CDROM Discovered!
- Replies: 6
- Views: 4701
First LibCrypt CDROM Discovered!
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...
- May 7th, 2024, 12:55 am
- Forum: Programming/CPU
- Topic: What is ECOFF?
- Replies: 4
- Views: 4967
Re: What is ECOFF?
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...
- May 6th, 2024, 8:12 am
- Forum: Programming/CPU
- Topic: What is ECOFF?
- Replies: 4
- Views: 4967
What is ECOFF?
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...