Search found 203 matches

by TriMesh
Yesterday, 5:30 pm
Forum: Hardware
Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
Replies: 48
Views: 58914

Re: [Hardware Mod] 8MB in (PU-18) Retail PSX

I plan to try out this mod with a similar tactic- buying a SODIMM stick with potentially compatible ICs and desoldering them with a hot air station. The specific stick I've ordered is labled "HYMIB20016 IBM EQUIV 92G7341 16MB 144PIN EDO SODIMM". It's double-sided with four ICs per side. Going by ph...
by TriMesh
Yesterday, 12:44 pm
Forum: Research
Topic: Old 160pin GPU Pinout & Rendering Differences
Replies: 8
Views: 12086

Re: Old 160pin GPU Pinout & Rendering Differences

The CPU date code seems to be week 14, 1996 - which given the manufacture date of the unit suggests it's been replaced at some point.

There is also an AQ CPU stepping which I've only ever seen on PU-7 boards from SCPH-1000s
CXD8530AQ.jpg
by TriMesh
July 22nd, 2020, 2:14 pm
Forum: Psy-Q SDK
Topic: Psy-Q SDK Legal Status
Replies: 8
Views: 3726

Re: Psy-Q SDK Legal Status

Well, I think actually Psy-Q has violated copyright law as well. I think ccpsx is based on gnucc. gnucc's license mentions that anyone asking for the source of ccpsx should get it for free, and that they have the right to redistribute it too. I don't know about the other tools included in the SDK. ...
by TriMesh
July 22nd, 2020, 11:11 am
Forum: General Chat / Messaging
Topic: SCPH-1001 weird PCB module
Replies: 3
Views: 167

Re: SCPH-1001 weird PCB module

hey TriMesh, thanks for the reply, i asked about this board in the discord #hardware channel and was told the same thing, i guess its pretty rare, i haven't seen one before. Yeah, I think by the time the PlayStation came out the TVs that used the specific sync separator circuit that had a problem w...
by TriMesh
July 15th, 2020, 7:16 pm
Forum: General Chat / Messaging
Topic: SCPH-1001 weird PCB module
Replies: 3
Views: 167

Re: SCPH-1001 weird PCB module

It's an official modification carried out by Sony. There were some TVs (notably some Zenith models) that didn't like the sync the PlayStation produced and that board changed the way the composite sync was produced to fix the problem. If you phoned up the service line and complained that the image on...
by TriMesh
May 15th, 2020, 1:10 am
Forum: Hardware
Topic: PSone - What kind of mod is this?
Replies: 8
Views: 451

Re: PSone - What kind of mod is this?

Yeah, that makes sense - in that case presumably there is an IR receiver somewhere and that little board is just reading the IR stream and simulating pushing buttons on the controller.
by TriMesh
May 14th, 2020, 9:35 pm
Forum: Hardware
Topic: PSone - What kind of mod is this?
Replies: 8
Views: 451

Re: PSone - What kind of mod is this?

Yeah, it's a Video CD player board - the CL680 is one of the original single-chip VCD player devices. I suspect that board marked "PS2DVD" is a modchip and the marking is just camoflage. The wires connected to the memory card socket are so the board can read the controller - the pins for the control...
by TriMesh
February 25th, 2020, 6:41 pm
Forum: General Chat / Messaging
Topic: DTL-H1101 Laser replacment..?
Replies: 1
Views: 3388

Re: DTL-H1101 Laser replacment..?

At this point, unfortunately most of the CD drive mechanisms available on places like eBay are basically junk. The production stopped a long time ago and anything that gets put together now is most likely going to be using parts that are either recycled or were rejected back in the day for some reas...
by TriMesh
January 30th, 2020, 5:30 pm
Forum: General Chat / Messaging
Topic: Which replacement laser for which revision?
Replies: 5
Views: 4228

Re: Which replacement laser for which revision?

It's easiest to base in on the main board type. PU-7 and PU-8 machines used either KSM-440AAM or KSM-440ACM PU-18 and PU-20 used KSM-440ADM PU-20 and PU-22 used KSM-440AEM PSone used KSM-440BAM You can freely interchange KSM-440AAM, KSM-440ACM and KSM-440BAM because the cables are the same The KSM-4...
by TriMesh
January 29th, 2020, 6:15 pm
Forum: Input/Output
Topic: PSX Keyboard and Mouse Adaptor (SCPH-2000 Prototype)
Replies: 51
Views: 52685

Re: PSX Keyboard and Mouse Adaptor (SCPH-2000 Prototype)

One interesting thing is that it's using a mask-programmed 68HC05 - which would normally imply these were made in quite large quantities. Makes you wonder where they all went.
by TriMesh
June 1st, 2019, 12:23 am
Forum: Miscellaneous / Off Topic
Topic: Compiling: beatmania APPEND 5thMIX -Time to get down-
Replies: 7
Views: 7430

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: 3822

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: 2989

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: 3642

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: 3642

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: 2705

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: 5735

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: 2554

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: 67
Views: 40562

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: 7436

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...