Search found 229 matches
- April 21st, 2019, 4:48 am
- Forum: Hardware
- Topic: Seeking service manuals/hardware information
- Replies: 5
- Views: 11210
Re: Seeking service manuals/hardware information
There is no pinout for the GTE, because it's not a separate chip. It's implemented as part of the main CPU, and it's not even possible to monitor the signals to it because it's on the R3K coprocessor bus which isn't bought out to pins on the package.
Thanks very much for the information. I ...
- April 20th, 2019, 5:52 pm
- Forum: Hardware
- Topic: Seeking service manuals/hardware information
- Replies: 5
- Views: 11210
Re: Seeking service manuals/hardware information
I've never been able to find one. There is a a cleaned up and more legible version of the manual that was done by nocash:
http://www.psxdev.net/forum/viewtopic.php?f=49&t=1312&p=12998&hilit=SCPH+5500#p12998
There is no pinout for the GTE, because it's not a separate chip. It's implemented as part ...
http://www.psxdev.net/forum/viewtopic.php?f=49&t=1312&p=12998&hilit=SCPH+5500#p12998
There is no pinout for the GTE, because it's not a separate chip. It's implemented as part ...
- April 1st, 2019, 2:05 pm
- Forum: Programming/CPU
- Topic: How to properly send commands to the CD controller (low-level)
- Replies: 1
- Views: 9363
Re: How to properly send commands to the CD controller (low-level)
You always have to wait for the int before sending another command or it just gets dropped on the floor. If the last int hasn't been cleared, the HC05 just throws the command away.
- March 29th, 2019, 6:37 pm
- Forum: General Chat & Messaging
- Topic: PSone Internal Cheat Cart / Flash ROM
- Replies: 17
- Views: 27247
Re: PSone Internal Cheat Cart / Flash ROM
Yeah, you can just connect it to the WR/ signal on the CPU - note that there are 2 of them and the one you want is SWR0/, which is on pin 100 of the CPU.
- March 27th, 2019, 4:51 am
- Forum: General Chat & Messaging
- Topic: Modchip suggestion for PSOne with bios 4.1
- Replies: 4
- Views: 9114
Re: Modchip suggestion for PSOne with bios 4.1
Thanks i'll try that.
Still i was wondering if one was better than the others.
They are all pretty much equivalent in this application - the part of the code that carries out the actual modchip function is the same. For a non-PAL console, there is no need to connect the wire from pin 3 of the ...
- March 25th, 2019, 3:36 am
- Forum: Homebrew (General)
- Topic: Newer X-Flash Builds
- Replies: 146
- Views: 382036
Re: Compiling X-Flash
Maybe the inline assembler doesn't like an implied offset of zero - try changing ($4) to 0($4) to make the zero offset explicit
- March 20th, 2019, 4:13 am
- Forum: Examples (Psy-Q)
- Topic: BS Image Loader Example
- Replies: 9
- Views: 77982
Re: BS Image Loader Example
This code is one of the first things that i tested. Thanks!
But i have a maybe dumb question. Can we use LoadBS() and sort TIM's and/or work with frame buffer at the same time?
Here is the example from "Duke Nukem: Time to Kill":
https://www.vizzed.com/vizzedboard/retro/user_screenshots/saves15 ...
- March 20th, 2019, 3:44 am
- Forum: General Chat & Messaging
- Topic: PSone - two modchips simultaneously?
- Replies: 16
- Views: 33535
Re: PSone - two modchips simultaneously?
It's looks more like a problem with Taiyo Yuden disc - lol. Sony Lead Data/MBI and Ritek discs works better. Anyway thanks for clarifying and help.
Right now starting game copy from BIOS ends with "Please insert PlayStation disc". Too long wires?
Did you have the drive cover open when the ...
- March 18th, 2019, 12:16 pm
- Forum: General Chat & Messaging
- Topic: PSone - two modchips simultaneously?
- Replies: 16
- Views: 33535
Re: PSone - two modchips simultaneously?
I think the position you have the chip is fine - the problem is that the PM-41(2) is known to be extremely sensitive. As rama said, sometimes adding decoupling to the cap helps - you can also try adding a cap (say another 0.1uF) in series with pin 6 to act as a DC block. Sometimes that helps ...
- March 18th, 2019, 12:10 pm
- Forum: Hardware
- Topic: Playstation SCPH-7502 Loading speed
- Replies: 4
- Views: 10764
Re: Playstation SCPH-7502 Loading speed
Yeah, slow loading can certainly be caused by a bad CD assembly. Depending on what you mean by "bad condition", it might be worth cleaning the optical pickup assembly - if the unit was stored in dusty conditions, it might have dust on the turning mirror inside the pickup, and that can cause the ...
- March 18th, 2019, 2:49 am
- Forum: Hardware
- Topic: Playstation SCPH-7502 Loading speed
- Replies: 4
- Views: 10764
Re: Playstation SCPH-7502 Loading speed
Yeah, slow loading can certainly be caused by a bad CD assembly. Depending on what you mean by "bad condition", it might be worth cleaning the optical pickup assembly - if the unit was stored in dusty conditions, it might have dust on the turning mirror inside the pickup, and that can cause the read ...
- March 18th, 2019, 2:40 am
- Forum: General Chat & Messaging
- Topic: PSone - two modchips simultaneously?
- Replies: 16
- Views: 33535
Re: PSone - two modchips simultaneously?
Okay, I have modchip inside of PSone with older board. Does wire lenght matter only for booting, or it could affect also reading disc during game? Also it's stealth install.
https://i.imgur.com/ZyTTr4K.jpg
It's not beautiful, but it works. The thing is, I have a feeling that it struggles a ...
- March 17th, 2019, 6:41 am
- Forum: General Chat & Messaging
- Topic: PSone Internal Cheat Cart / Flash ROM
- Replies: 17
- Views: 27247
Re: PSone Internal Cheat Cart / Flash ROM
That makes sense now. Assume the mapping of the switch into ROM is done by the GAL/PAL?
I only have 256k flash parts on hand anyway so that shouldn't be a problem.
I do remember you looking at the AR carts and USB transfer a while back..do you know how hard would it be to implement the contents ...
- March 16th, 2019, 1:23 am
- Forum: General Chat & Messaging
- Topic: PSone Internal Cheat Cart / Flash ROM
- Replies: 17
- Views: 27247
Re: PSone Internal Modchip
Thanks Trimesh,
I shall give this a go. The seller of the PSone on eBay mentions running Caetla - by patched would I be able to just flash caetla?
Would I be correct in assuming that if I use a supported flash part, and wire up W/E I should be able to flash it using xflash?
Thanks
My guess ...
- March 15th, 2019, 3:33 am
- Forum: General Chat & Messaging
- Topic: PSone Internal Cheat Cart / Flash ROM
- Replies: 17
- Views: 27247
Re: PSone Internal Modchip
Electrically, it's pretty simple - most of the pins are identical to the ones used on the boot ROM with the exception that CE/ has to go to pin 98 of the CPU (the boot ROM goes to pin 97) - data, address and OE/ go to the same places as the corresponding signals on the boot ROM.
The code you put in ...
The code you put in ...
- March 9th, 2019, 2:19 am
- Forum: General Chat & Messaging
- Topic: PSone - two modchips simultaneously?
- Replies: 16
- Views: 33535
Re: PSone - two modchips simultaneously?
I have no proof of this, but based on examination of the code I think the code that supports PU22/PU23/PSone in both MM3 and ONEchip was copied from Mayumi 4damiank94 wrote: March 8th, 2019, 8:43 pm So, Mayumi and Multimode also didn't release pin 6? That sucks. I asked some people around with newer motherboard with modchips about that.
- March 8th, 2019, 5:33 am
- Forum: General Chat & Messaging
- Topic: PSone - two modchips simultaneously?
- Replies: 16
- Views: 33535
Re: PSone - two modchips simultaneously?
It should work - the boot ROM patch on the ONEchip is separate from the modchip functions and you can use either of them on their own.
Having said that, I'm not sure it will actually work any better, since the actual code in the ONEchip that does the modchip function is pretty much identical to the ...
Having said that, I'm not sure it will actually work any better, since the actual code in the ONEchip that does the modchip function is pretty much identical to the ...
- March 4th, 2019, 12:47 pm
- Forum: General Chat & Messaging
- Topic: PSX won't read discs
- Replies: 2
- Views: 7396
Re: PSX won't read discs
Honestly, my guess is that you have two bad optical pickup assemblies, not least because they are by far the highest failure rate item on these consoles. I would recommend finding someone local that has a working SCPH-9002 (and doesn't mind you taking it apart!) and swapping the parts you have (PSU ...
- February 27th, 2019, 3:03 pm
- Forum: Software & Hardware Trading
- Topic: [WTB] SCPH-1000/5500 Board
- Replies: 2
- Views: 30617
Re: [WTB] SCPH-1000/5500 Board
Did you get these parts, or are you still looking for them?
- February 27th, 2019, 3:02 pm
- Forum: General Chat & Messaging
- Topic: New and eager to learn!
- Replies: 7
- Views: 14946
Re: New and eager to learn!
Net Yaroze is very limited and expensive. Try to setup and install Psy-Q and compile some code . Then just run PS-EXE (.EXE) file with any working emulator. I prefer PCSXR, but you can use EPSXE or NO$PSX (god bless VRAM viewer!)
Good luck :>
I think the Yaroze is helpful for getting a quick ...