Search found 306 matches

by nocash
May 30th, 2017, 2:26 pm
Forum: Hardware
Topic: [Hardware Mod] NTSC/PAL reference oscillator mod for PU-18
Replies: 45
Views: 51388

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

Yeah, I've expected possible crawling effects, too. But so far it looked quite fine. My first test looked pretty perfect. Later on I did once had some "dithered lines" slowly wandering down the screen, maybe it's been just because I don't have shielding plates installed yet... but, yes, dither artif...
by nocash
May 30th, 2017, 11:16 am
Forum: Hardware
Topic: PlayStation PAL Series Colour/Color Modification (PAL60)
Replies: 70
Views: 74505

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

Just converted a PU-16 board to PAL, using one of those 4-pin 4.43361875MHz oscillators as described above. I've also had to fix the GNDed clock signal on the GPU.pin192, and instead connected it to the NTSC clock signal on GPU.pin196. As TriMesh had pointed out here, http://www.psxdev.net/forum/vie...
by nocash
May 30th, 2017, 10:48 am
Forum: Hardware
Topic: [Hardware Mod] NTSC/PAL reference oscillator mod for PU-18
Replies: 45
Views: 51388

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

I'm just converting the SCPH-5903 with PU-16 board to PAL. For getting the PAL colors, I've just wired a 4-pin 4.43361875MHz oscillator to the RGB-to-Composite converter, ie. about as described here: http://www.psxdev.net/forum/viewtopic.php?f=47&t=444#p4751 The advantage is that that oscillator is ...
by nocash
May 29th, 2017, 1:40 am
Forum: Hardware
Topic: Remove the serial I/O, adding a RS-232 jack??
Replies: 7
Views: 4601

Re: Remove the serial I/O, adding a RS-232 jack??

Yeah, maybe TTL could stand for transistor logic in general, I've always seen it as pseudonym for 5V logic. CMOS is more about power consumption (in amperes) (eg. as in 27Cxxx cmos-eproms vs older 27xxx noncmos-eproms). Ah, yes, the inverted signals are also very important to know about. Reminds me ...
by nocash
May 28th, 2017, 2:23 pm
Forum: Homebrew (Homepage)
Topic: [GGJ 2017] DeathBall
Replies: 13
Views: 17245

Re: [GGJ 2017] DeathBall

I've got it working in no$psx to reach the screen with Play / Credits buttons, but then it seems to hang there. Or, wait, does it require two joypads, and is supposed to 'hang' with only one joypad? Thanks to your code, I've found two bugs in my kernel clone, both related to cases where I've tried t...
by nocash
May 28th, 2017, 10:18 am
Forum: Hardware
Topic: Remove the serial I/O, adding a RS-232 jack??
Replies: 7
Views: 4601

Re: Remove the serial I/O, adding a RS-232 jack??

Which voltages are you aiming at? Real classic RS232 would be around +9V/-9V, and TTL would be 0V/5V, and the unmodded PSX serial should be around 0V/3.3V. I would assume that most modern "USB-RS232" variants are somewhere in that range, too (in that case you might get away without voltage conversio...
by nocash
May 28th, 2017, 1:19 am
Forum: Research
Topic: SCPH-5903 PSX VCD Main/Sub-board Images
Replies: 39
Views: 47358

Re: SCPH-5903 PSX VCD Main/Sub-board Images

TriMesh has given the SCPH-5903 console and four VCD movies on pressed discs to me. Here's my hardware review: The picture quality looks quite okay to me, of course, if you've grown up in 21st century and have never seen a VHS tape or a CRT display, then you might get the shock of your life when wat...
by nocash
May 24th, 2017, 7:02 am
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 14
Views: 20190

Re: Reverse Engineering the PSX Copy Protection (Wobble Groo

Seeing a PSX disc under microscope would be really interesting. Are you sure that one needs a Scanning Electron Microscope for that? A high-resolution Optical Microscope might work, too. As long as it can deal with the black surface of PSX discs, which aren't entirely black, in fact the PSX discs ar...
by nocash
May 12th, 2017, 11:38 pm
Forum: Hardware
Topic: help to flashing Game Hunter
Replies: 9
Views: 7213

Re: help to flashing Game Hunter

what are the size of this epprom ? is 128 K ? The datasheet for flash/eeprom should tell you if it's 128, and if it's Kbit or Kbyte. If it's currently flashed with EMS firmware then D0h,01h would be the first two bytes of the FLASH memory, meaning that the chip didn't enter ID mode, and still retur...
by nocash
May 12th, 2017, 11:18 pm
Forum: Hardware
Topic: Any differences with the Sony A2106R and H7240AKV encoders?
Replies: 9
Views: 6832

Re: Any differences with the Sony A2106R and H7240AKV encode

Check the datasheet for the H7240AKV.
by nocash
May 11th, 2017, 10:38 pm
Forum: Hardware
Topic: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install
Replies: 44
Views: 41668

Re: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install

Basically the logic is... Wow. Thanks for all that insights! I didn't knew how/why that WFCLK "sync" connection worked for booting unlicensed discs. Yeah, using the SPEED signal with delays looks a bit hacky, and might run into troubles with some games/bioses/expansion roms. I am wondering about th...
by nocash
May 11th, 2017, 10:10 pm
Forum: Hardware
Topic: PSNee further development
Replies: 550
Views: 388427

Re: PSNee further development

Okay, if you have one console that works without taping, then the taped consoles probably won't be worse than that console. Yes, music discs should be best because they allow to actually test if the tracks are there. You may have a hard time finding a 99-track music disc, but you could burn one your...
by nocash
May 11th, 2017, 9:40 pm
Forum: Hardware
Topic: PSNee further development
Replies: 550
Views: 388427

Re: PSNee further development

Come on, decoding 98 bits isn't that much hassle. But aside from the SPI "input" you might also need to wire SPI "clock" and "output", and yes, that could get a bit complicated, nobody wants modchips with dozens of pins & wires. It wouldn't look too elegant. Logging the read scex command won't help ...
by nocash
May 11th, 2017, 9:26 pm
Forum: Hardware
Topic: Any differences with the Sony A2106R and H7240AKV encoders?
Replies: 9
Views: 6832

Re: Any differences with the Sony A2106R and H7240AKV encode

I wasn't aware of the H7204AKV, but Sony had used a bunch of different RGB/composite chips, with the H7204AKV included: IC207 64pin "SONY CXD2923AR" VRAM Data to Analog RGB ;\oldest IC501 24pin "SONY CXA1645M" Analog RGB to Composite ;/ IC202 44pin "Philips TDA8771H" Digital RGB to Analog RGB ;\old ...
by nocash
May 9th, 2017, 3:39 am
Forum: Research
Topic: Kernel ROM chip part numbers
Replies: 14
Views: 15051

Re: Kernel ROM chip part numbers

Thanks! MX23L4100-15 sounds like some standard part number, ah, yes, there's a MX23L4100 mask rom datasheet (somehow I've never thought about looking for datasheets for PSX ROMs yet). The -15 is probably, and the 4-digit 1002 is probably the ROM version (although v1.0j has that same number, too). Wi...
by nocash
May 5th, 2017, 2:38 am
Forum: Hardware
Topic: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install
Replies: 44
Views: 41668

Re: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install

CRC "3539DEF6" ...Romstatus "Dumped" ..."Sony Computer Entertainment Inc. -1000 KT-3 By S.O." Okay, thanks. The extra-info that I was after is the part number (the whole text on the ROM chip), the package (40pin?), and the board name and mechacon part number (ie. PU-7, 1-655-322-15 and 42660 (unles...
by nocash
May 5th, 2017, 2:13 am
Forum: Homebrew (Homepage)
Topic: [GGJ 2017] DeathBall
Replies: 13
Views: 17245

Re: [GGJ 2017] DeathBall

The dropbox link doesn't work with Windows 98, it does only show a blank white browser window. Does it require Windows 7? Hmmm, I always thought that Garbage (and Windows 7) is usually called "bloated", or is that just padding? I don't know what you have padded why/where/how, but, in general, it sou...
by nocash
May 4th, 2017, 11:33 pm
Forum: Hardware
Topic: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install
Replies: 44
Views: 41668

Re: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install

HC05 pin42/80 is PortC.bit3, ie. drive SPEED, the TOC/SCEX is read at single-speed, and other sectors are (normally) read at double speed, so that should actually work for sensing when to output the SCEX signal, but only if the games are really using double speed (which might apply for most or all g...
by nocash
May 4th, 2017, 8:58 am
Forum: Hardware
Topic: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install
Replies: 44
Views: 41668

Re: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install

Thanks for the pin-outs & confirming that it's a SCPH-3000 board! I've added a note in the http://www.psxdev.net/forum/viewtopic.php?f=70&t=557&p=4284#p4284 thread, saying that the 424660 cdrom/firmware is also used on that board. Now that you have that "rare" board around, do you have some tools fo...
by nocash
May 3rd, 2017, 8:26 pm
Forum: Hardware
Topic: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install
Replies: 44
Views: 41668

Re: [Diagram]SCPH-1000/3000 PU-7 MM3 Stealth Install

No! I hate modchip diagrams! Can somebody explain why those modchip diagrams always consist of nothing but numbers and arrows? I understand that commercial modchip manufacturers don't want other people to figure out how modchips are working. But if you don't have that kind of commerical interests, a...