Search found 219 matches

by TriMesh
September 7th, 2020, 9:53 pm
Forum: General Chat / Messaging
Topic: Hello, trying to fix SCPH-1001 and Xplorer V2 questions
Replies: 7
Views: 573

Re: Hello, trying to fix SCPH-1001 and Xplorer V2 questions

Unfortunately, there are a whole bunch of things that can stop the CD drive from working even if the optical pickup is good. Can it read the TOC on the disc (put in an audio disc and see if the track numbers appear in the CD player)? If it's reading the TOC, can it play an audio track? Is it distort...
by TriMesh
September 7th, 2020, 12:31 pm
Forum: Hardware
Topic: Ps1 scph 1000 replacement bios
Replies: 7
Views: 541

Re: Ps1 scph 1000 replacement bios

I think the 29F400 is a 5V part - see if you can get a 29LV400, which is the 3V equivalent.

That pinout you posted seems to be for some other device - possibly a 29F800 since it has an A18 pin...
by TriMesh
September 7th, 2020, 4:08 am
Forum: Hardware
Topic: Ps1 scph 1000 replacement bios
Replies: 7
Views: 541

Re: Ps1 scph 1000 replacement bios

Unfortunately not - at least not reliably. The difference is the supply voltage = 27C400 = 5V part, 27V400 = 3.3V part - and the PSX is a 3.3V system Also note that full-size DIP package won't fit on the board - the package that fits the PCB is a .525" small outline type. If you want a part that wil...
by TriMesh
September 7th, 2020, 3:55 am
Forum: General Chat / Messaging
Topic: Mod chip history
Replies: 2
Views: 376

Re: Mod chip history

I think stealth 2.8a was developed by someone in the UK, but I'm not sure who. It was pretty widely available in the UK at the time in any case. MM3 appears to be based on Mayumi 4.0 - the "new boards" code is pretty much identical, but there is some extra stuff for mode selection and compatibility ...
by TriMesh
September 7th, 2020, 3:25 am
Forum: Hardware
Topic: Ps1 scph 1000 replacement bios
Replies: 7
Views: 541

Re: Ps1 scph 1000 replacement bios

OK thank you very much. Personally I would like a bios of the 7xxx or 9xxx series, I suppose it should work right? For the programming on the chip I only have to download the bios in the .bin format and enter it like this without modifying any line? Thank you very much again Yes, you should be able...
by TriMesh
September 6th, 2020, 7:37 pm
Forum: Hardware
Topic: Ps1 scph 1000 replacement bios
Replies: 7
Views: 541

Re: Ps1 scph 1000 replacement bios

The mask ROMs in these old machines use a standard JEDEC pinout - so the cleanest approach is to get a 3.3V 512kbit SO EPROM like a 27V400 and just solder it in - this is an exact pin for pin replacement and will just drop in place of the ROM. These were however never very widely used parts in that ...
by TriMesh
September 3rd, 2020, 4:34 pm
Forum: Hardware
Topic: PlayStation PAL Series Colour/Color Modification (PAL60)
Replies: 79
Views: 79997

Re: PlayStation PAL Series Colour/Color Modification (PAL60)

Ok, more updates. I borrowed a friends 9000 model ps1 and it booted straight into a usa game in colour using my cables and my tv. Whilst my ps1 isnt technically faulty as it plays PAL games play perfectly over the RGB cable on this pal machine. So no idea why it doesnt work for Japanese and America...
by TriMesh
August 31st, 2020, 12:24 am
Forum: Work Logs / Projects
Topic: PSX CD-Player only Project
Replies: 87
Views: 119212

Re: PSX CD-Player only Project

Unfortunately it isn't. :( It's a pity! And such an option for playing a CD as " A-B repeat " is possible? Or maybe it has already been implemented, I just did not notice it? :? There isn't any function to do this in the CD-ROM firmware - but it's certainly possible using code running on the main c...
by TriMesh
August 30th, 2020, 1:40 am
Forum: Work Logs / Projects
Topic: PSX CD-Player only Project
Replies: 87
Views: 119212

Re: PSX CD-Player only Project

I'm interested if PSX capable of reading CD-Text information on AudioCD ? Maybe there is a project that has implemented such a function ? Unfortunately it isn't. The signals running from the CD DSP that carry the full subcode (including the R to W channels that CD-Text is stored in) are simply not ...
by TriMesh
August 23rd, 2020, 7:04 am
Forum: Hardware
Topic: TTY output with real hardware (how ?)
Replies: 3
Views: 404

Re: TTY output with real hardware (how ?)

The actual hardware that works with the boot ROM debug console code is a Motorola 68681 DUART mapped to 0x1f802000-0x1f80207f - there doesn't seem to be any chip select for this, so you have to decode the address yourself. The DTL-H2000 has some logic on it that implements just enough of this functi...
by TriMesh
August 17th, 2020, 4:50 am
Forum: Hardware
Topic: 17w VS 10w: is there a difference?
Replies: 1
Views: 8419

Re: 17w VS 10w: is there a difference?

OK, this is serious necroposting, but in case anyone else has the same question the answer is basically no. It's just a difference in the way that UL used to calculate nameplate power ratings compared to pretty much anyone else in the world. This especially tended to show up on small switch mode sup...
by TriMesh
August 17th, 2020, 4:36 am
Forum: Hardware
Topic: [Hardware Mod] NTSC/PAL reference oscillator mod for PU-18
Replies: 51
Views: 56842

Re: [Hardware Mod] NTSC/PAL reference oscillator mod for PU-18

My guess is that you accidentally shorted something and blew a fuse - they are the little black devices with reference designations starting with "PS" (Like "PS602") that are on the lower left corner of the board near the socket that connects to the power supply. Try powering the unit up and checkin...
by TriMesh
August 17th, 2020, 4:26 am
Forum: Software / Hardware Trading
Topic: PSXSERIAL USB Cables
Replies: 17
Views: 11270

Re: PSXSERIAL USB Cables

aeromaxx wrote:
July 15th, 2020, 6:06 pm
Extremely late to the party, and also sorry for resurrecting a really old thread, would anyone happen to know where I could get one of these already premade for me?
Try asking dahans42 if he has any left - he was selling them at one point.
by TriMesh
August 16th, 2020, 4:02 pm
Forum: Hardware
Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
Replies: 55
Views: 65102

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

Yeah, that's the correct setting - obviously, that software will only work with an FTDI chip and if you're using some other USB->serial adapter you will need to invert the lines using hardware. I've used these things just wired directly to link cables set up like that successfully with SIOCONS. FTDI...
by TriMesh
August 16th, 2020, 12:55 am
Forum: Hardware
Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
Replies: 55
Views: 65102

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

Update: I have performed the upgrade and wire work on the bottom of the board. The console appears to be working perfectly normal so I believe this *could* potentially be a complete success using the above-mentioned "MT4LC2M8E7TG-6 S" ICs. Unfortunately I haven't yet managed to get PSXSERIAL to wor...
by TriMesh
August 15th, 2020, 1:15 am
Forum: Yaroze SDK
Topic: Missing Access Card
Replies: 2
Views: 626

Re: Missing Access Card

Hi there, New poster to the forum; just wondering does anyone know of a solution for a missing access card? Is it possible to modify a stock PS1 memory card to act as a Net Yaroze Access Card? Or is there some other solution other than waiting for a few years for an access card to show up on ebay? ...
by TriMesh
August 10th, 2020, 5:30 pm
Forum: Hardware
Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
Replies: 55
Views: 65102

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
August 10th, 2020, 12:44 pm
Forum: Research
Topic: Old 160pin GPU Pinout & Rendering Differences
Replies: 8
Views: 12842

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: 4375

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: 626

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...