Search found 522 matches

by nocash
Today, 2:36 pm
Forum: Sound/SPU
Topic: ADSR Behavior Consensus?
Replies: 5
Views: 401

Re: ADSR Behavior Consensus?

Just following up to say a big thank you - this writeup on the ADSR behavior is great - really straightforward compared to most other things I'd seen. Yipieh. I guess it was almost a bit too straightforward, lacking all those expected confusing descriptions ; ) I'm looking forward to your SPU test ...
by nocash
February 16th, 2024, 2:15 pm
Forum: General Chat & Messaging
Topic: PSX Vertex Colour and Texture Blending
Replies: 3
Views: 209

Re: PSX Vertex Colour and Texture Blending

The formula is A = B * C, but I don't know if or how you can implement that ; )
by nocash
February 12th, 2024, 12:52 pm
Forum: General Chat & Messaging
Topic: No streamed audio (hardware problem)
Replies: 8
Views: 675

Re: No streamed audio (hardware problem)

Yes, KM62V256CL6-7L should be the same. I'll add that as another known chip in psxspx. The XA-ADPCM decoder chip would be CXD1815Q (Decoder/FIFO), but I don't know if/which/if any pins could cause ADPCM problems. I would rather not mess with that chip, or first check the CXD1815Q (or CXD1199AQ) data...
by nocash
February 11th, 2024, 2:20 am
Forum: Research
Topic: GPU Rendering Timings
Replies: 2
Views: 285

Re: GPU Rendering Timings

And rougly related: The GPU FIFO behaviour. The FIFO itself isn't so special, but the timings for removing and processing data from FIFO are quite complicated... The GPU uses a 16-word (64-byte) write FIFO for sending commands and parameters (and VRAM data) from CPU to GPU. FIFO Overrun Internally, ...
by nocash
February 11th, 2024, 1:54 am
Forum: Sound/SPU
Topic: ADSR Behavior Consensus?
Replies: 5
Views: 401

Re: ADSR Behavior Consensus?

Does this require much specialized hardware or knowledge? No, nothing special (other than having a way to run EXE files on the console, preferably without burning CDRs for each test). I've been reading the SPU section of psx-spx a ton over the last few days, but I haven't seen anything specifically...
by nocash
February 9th, 2024, 12:17 am
Forum: Research
Topic: GPU Rendering Timings
Replies: 2
Views: 285

GPU Rendering Timings

Here are the GPU rendering timings. All values are measured in 33MHz CPU clock cycles. The GPU can render up to 66 million pixels per second, that figure applies for monochrome Rects, textured Rects, and even for Rects with texture blending. Monochrome Polygons can also reach 66Mpix/s, however, the ...
by nocash
February 8th, 2024, 9:04 am
Forum: Sound/SPU
Topic: ADSR Behavior Consensus?
Replies: 5
Views: 401

Re: ADSR Behavior Consensus?

The best method is to emulate the SPU on the playstation itself. And then capture the real hardware's waveforms (from reverb buffer, or from the SPU status registers), and compare them against the emulated waveforms. A basic test would be to display the captured & emulated waveforms on the scree...
by nocash
February 7th, 2024, 9:40 am
Forum: General Chat & Messaging
Topic: No streamed audio (hardware problem)
Replies: 8
Views: 675

Re: No streamed audio (hardware problem)

I think this is where I need to look? ( https://psx-spx.consoledev.net/pinouts/#pinouts-spu-pinouts ) Sorts of, that's some older/inofficial hack. The official doc is here http://problemkaputt.de/psx-spx.htm Either way, if you search for something like IC310, the doc should contain part numbers of ...
by nocash
February 7th, 2024, 7:33 am
Forum: General Chat & Messaging
Topic: No streamed audio (hardware problem)
Replies: 8
Views: 675

Re: No streamed audio (hardware problem)

When you are saying streamed audio, do you mean compressed XA-ADPCM (as used for audio in most cut-scene movies)? Apart from the decompression, there isn't much of a difference between streaming XA-ADPCM and CA-DA from music CDs. So it's very weird that one works, and the other doesn't. The other th...
by nocash
January 31st, 2024, 7:16 am
Forum: Hardware
Topic: Need help to transcolde pal to ntsc scph 5552
Replies: 5
Views: 821

Re: Need help to transcolde pal to ntsc scph 5552

Okay, fine.
by nocash
January 31st, 2024, 6:07 am
Forum: Hardware
Topic: Need help to transcolde pal to ntsc scph 5552
Replies: 5
Views: 821

Re: Need help to transcolde pal to ntsc scph 5552

The existing pal/ntsc mods are mostly intended to run import games, not to convert the whole console from pal to ntsc. The latter would only make sense if you really like the challenge of doing overcomplicated or outright crazy things. But if you are up for that... For 60hz boot menu, replace the bo...
by nocash
January 31st, 2024, 3:03 am
Forum: Hardware
Topic: Need help to transcolde pal to ntsc scph 5552
Replies: 5
Views: 821

Re: Need help to transcolde pal to ntsc scph 5552

Do you mean NTSC frame rate (60Hz), or NTSC color encoding (but what for)?

Anyways, to "stay" in NTSC, you may need to use a cdrom with an NTSC game on it.
by nocash
January 30th, 2024, 12:13 am
Forum: Homebrew (General)
Topic: Five Night at Freddy's PS1
Replies: 6
Views: 874

Re: Five Night at Freddy's PS1

Cutting the image into smaller parts to match the texture page limits sounds just right.

I've managed to copy the gamejolt page link, https://gamejolt.com/games/FNAF-ps1/832993 and the download for the recent version should be at https://gamejolt.com/get/build?game=832 ... ld=1520775
by nocash
January 29th, 2024, 9:15 pm
Forum: Homebrew (General)
Topic: Five Night at Freddy's PS1
Replies: 6
Views: 874

Re: Five Night at Freddy's PS1

Ah, I've got it: On the github readme page you have a link to the gamejolt page, which has a link to the binary .zip file. I'll try to copy/paste the links from my tablet to my PC later, and then try if I can download the file on the PC. In the previous post, I made a mistake (now corrected): The fi...
by nocash
January 28th, 2024, 10:15 pm
Forum: Homebrew (General)
Topic: Five Night at Freddy's PS1
Replies: 6
Views: 874

Re: Five Night at Freddy's PS1

Sounds interesting. But I can't use a compiler, it's not possible. A binary version would be nice (unless there are issues about the copyright for the original game maps and artwork). Memory cards can be basically accessed via normal file I/O functions, with device name bu00: or bu10:, but there are...
by nocash
January 24th, 2024, 10:07 pm
Forum: NO$PSX Emulator
Topic: NO$PSX V2.2 Released (16th Dec 2022)
Replies: 16
Views: 10986

Re: NO$PSX V2.2 Released (16th Dec 2022)

Pinned? Ah, the v2.0 and v2.1 are pinned, making them appear above the newer v2.2 version. Shadow, can you remove those pins? And just leave everything unpinned. The no$psx homepage is at http://problemkaputt.de/psx.htm The github page isn't mine. Some years ago I've been looking for a cheap new web...
by nocash
January 22nd, 2024, 4:27 pm
Forum: NO$PSX Emulator
Topic: 'Simulated known Patch: missing_cop0r13 (14-opcode r10/r9 variant)'
Replies: 4
Views: 1701

Re: 'Simulated known Patch: missing_cop0r13 (14-opcode r10/r9 variant)'

I don't understand what you are worried about. The compiler/sdk should certainly apply those patch(es), and the simulated known patch message does just conform that everything went fine.
by nocash
January 20th, 2024, 11:49 am
Forum: General Chat & Messaging
Topic: HORI HPS-83 ZeroForce Steering Wheel - are there any resources about the hardware
Replies: 8
Views: 2329

Re: HORI HPS-83 ZeroForce Steering Wheel - are there any resources about the hardware

Thanks for the descriptions! The broken plastic sounds fixable. It can be difficult to find the correct glue for different kinds plastic though. My favorite dirty trick is using a soldering iron instead of glue, and melt the edges of the broken piece, and then use some spare plastic parts from a rec...
by nocash
January 15th, 2024, 9:31 am
Forum: General Chat & Messaging
Topic: HORI HPS-83 ZeroForce Steering Wheel - are there any resources about the hardware
Replies: 8
Views: 2329

Re: HORI HPS-83 ZeroForce Steering Wheel - are there any resources about the hardware

I am afraid that I am also having a habit to investigate those things, like trying to document the most absurd controllers (like fishing controllers) in psxspx. So I would be also interested what is inside of your steering wheel (like any extra stuff like vibration motors or whatever). Oh, a rundown...
by nocash
January 15th, 2024, 9:08 am
Forum: NO$PSX Emulator
Topic: 'Simulated known Patch: missing_cop0r13 (14-opcode r10/r9 variant)'
Replies: 4
Views: 1701

Re: 'Simulated known Patch: missing_cop0r13 (14-opcode r10/r9 variant)'

Most games are applying patches to the original kernel code. That particular patch is used to fix bug in the interrupt handler of early PSX consoles. In my kernel clone, the opcodes are at different addresses, so the patches won't work when trying to patch opcodes at wrong addresses. However, the ke...