Search found 193 matches

by TriMesh
June 1st, 2019, 12:23 am
Forum: Miscellaneous / Off Topic
Topic: Compiling: beatmania APPEND 5thMIX -Time to get down-
Replies: 7
Views: 1271

Re: Compiling: beatmania APPEND 5thMIX -Time to get down-

That looks more like a linker error than anything from the preprocessor.
by TriMesh
May 15th, 2019, 4:59 pm
Forum: General Chat / Messaging
Topic: Yet Another New User!
Replies: 6
Views: 565

Re: Yet Another New User!

You can try looking on Orion's website at http://onorisoft.free.fr/psx/tutorial/tuto.htm - he's got some helpful information on how to develop for the PSX using less ancient OSes :)
by TriMesh
May 10th, 2019, 10:41 am
Forum: General Chat / Messaging
Topic: Disc burning problems
Replies: 4
Views: 541

Re: Disc burning problems

The lockups when running Unirom sounds like a weak optical drive. I would tend to say the other stuff is related to the drive too, but I can't explain the problems with running the images in an emulator that way. One thing to note is that the CD drive in the PSX is an old design and has a fixed gain...
by TriMesh
April 21st, 2019, 4:48 am
Forum: Hardware
Topic: Seeking service manuals/hardware information
Replies: 5
Views: 446

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 meant th...
by TriMesh
April 20th, 2019, 5:52 pm
Forum: Hardware
Topic: Seeking service manuals/hardware information
Replies: 5
Views: 446

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 of...
by TriMesh
April 1st, 2019, 2:05 pm
Forum: Programming/CPU
Topic: How to properly send commands to the CD controller (low-level)
Replies: 1
Views: 759

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.
by TriMesh
March 29th, 2019, 6:37 pm
Forum: General Chat / Messaging
Topic: PSone Internal Cheat Cart / Flash ROM
Replies: 17
Views: 1637

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.
by TriMesh
March 27th, 2019, 4:51 am
Forum: General Chat / Messaging
Topic: Modchip suggestion for PSOne with bios 4.1
Replies: 4
Views: 658

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 PIC t...
by TriMesh
March 25th, 2019, 3:36 am
Forum: Homebrew (General)
Topic: Newer X-Flash Builds
Replies: 40
Views: 2887

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
by TriMesh
March 20th, 2019, 4:13 am
Forum: Examples (Psy-Q)
Topic: BS Image Loader Example
Replies: 9
Views: 3868

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/saves15/155...
by TriMesh
March 20th, 2019, 3:44 am
Forum: General Chat / Messaging
Topic: PSone - two modchips simultaneously?
Replies: 14
Views: 1418

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 console w...
by TriMesh
March 18th, 2019, 12:16 pm
Forum: General Chat / Messaging
Topic: PSone - two modchips simultaneously?
Replies: 14
Views: 1418

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, someti...
by TriMesh
March 18th, 2019, 12:10 pm
Forum: Hardware
Topic: Playstation SCPH-7502 Loading speed
Replies: 4
Views: 684

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 rea...
by TriMesh
March 18th, 2019, 2:49 am
Forum: Hardware
Topic: Playstation SCPH-7502 Loading speed
Replies: 4
Views: 684

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...
by TriMesh
March 18th, 2019, 2:40 am
Forum: General Chat / Messaging
Topic: PSone - two modchips simultaneously?
Replies: 14
Views: 1418

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 little m...
by TriMesh
March 17th, 2019, 6:41 am
Forum: General Chat / Messaging
Topic: PSone Internal Cheat Cart / Flash ROM
Replies: 17
Views: 1637

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/map...
by TriMesh
March 16th, 2019, 1:23 am
Forum: General Chat / Messaging
Topic: PSone Internal Cheat Cart / Flash ROM
Replies: 17
Views: 1637

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 is that ...
by TriMesh
March 15th, 2019, 3:33 am
Forum: General Chat / Messaging
Topic: PSone Internal Cheat Cart / Flash ROM
Replies: 17
Views: 1637

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 ...
by TriMesh
March 9th, 2019, 2:19 am
Forum: General Chat / Messaging
Topic: PSone - two modchips simultaneously?
Replies: 14
Views: 1418

Re: PSone - two modchips simultaneously?

damiank94 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.
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 4
by TriMesh
March 8th, 2019, 5:33 am
Forum: General Chat / Messaging
Topic: PSone - two modchips simultaneously?
Replies: 14
Views: 1418

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 ...