Sony DTL-H2000 CD-ROM Termination Connector Pinout for SPU

[Administrator]

As per the DTL-H2000 hardware, the SPU will not work unless this specific pin is bridged. I have contacted many people in relation to find this pinout (official developers and even SCEEdev), and it eventually resulted in me purchasing another H2000 with the connector intact. I hope you enjoy the pinout and find it useful. May the future of the PlayStation 1 be preserved and live on!



If you don't want to order a connector, bridge these two pins (as indicated with the red line).
I highly recommend using 2.54mm 90 degree header pins.
That way, a simple jumper can enable or disable the termination effect.

[nocash]

Interesting. I've somehow completely missed the existence of that hardware so far. I was always thinking that the professional devkits would consists of some sort of modified consoles, not of ISA-cartridges.
Just noticed that you did already posted info about it here: http://www.psxdev.net/forum/viewtopic.php?f=49&t=103

I don't really understand what/where/why that termination connector is needed. The picture looks like a 40pin ribbon cable connector (with each three contacts actually being a single pin). On the other hand, the topmost photo at http://www.psxdev.net/forum/viewtopic.php?f=49&t=103 is showing differerent connectors: around 50pin on top, and around 26pin on lower right edge. So what is that 40pin terminator good for?

And one thing that would be very interesting would be goood photos/scans of the ISA carts with front & back sides. So that one could see how the chipset differs from regular PSX consoles. Parts are probably same as on PSX, but I might have read that the DTL-H2000 has more main RAM, is that right? And it does probably have the DUART chip for TTY debug messages? Plus whatever debug connection the PC's ISA bus.

Oh, and where does it load games from? Does it connect to a CDROM drive? And/or read data from PC's harddisk...?

[Administrator]

Hi NO$CASH. I have not been able to easily trace the pins, but one of the pins actually connects to a sealed pack of resistors, and then an IC (PCB: NL729 | IC: SN74ALS244BN) on pin 15 I believe. To actually trace the connections correctly, the entire PCB would need to be cleaned of all parts and sanded down to reveal the traces and vias since Sony added a good soldermask to cover all the linkages. The jumper is only needed for enabling the SPU.

As for the other connectors, they are for a SCSI HDD attachment so games may be loaded from a HDD. I'm not sure about the last connector as it looks like a floppy drive IDE/PATA connector. I don't think it was ever used to be honest.

You can see some scans here (scanned by 'Yaca2671'):
http://upload.wikimedia.org/wikipedia/c ... PU2_01.jpg
http://upload.wikimedia.org/wikipedia/c ... PU1_01.jpg

It can load games via RAM or the CD-ROM drive:
http://i.imgur.com/Qw4ATM3.jpg
http://i.imgur.com/v9DAouD.jpg

[nocash]

You can see some scans here (scanned by 'Yaca2671'):
http://upload.wikimedia.org/wikipedia/c ... PU2_01.jpg
http://upload.wikimedia.org/wikipedia/c ... PU1_01.jpg

Thanks! Ah, now I see... those blue connectors seem to have 1.27mm pin pitch instead of 2.56mm, so what seemed like 50pin & 26pin to me, is actually 100pin & 40pin. The latter one being used with that 40pin terminator plug.

For some chip part numbers it would be nice to have even better resolution PCB scans, or better contrast on some chips.

What is on the rear side of the PCBs? The retail PSX/PSone boards have chips on both PCB sides - does that apply to the ISA boards, too? Or aren't there any components on the rear side?

It can load games via RAM or the CD-ROM drive:
http://i.imgur.com/Qw4ATM3.jpg
http://i.imgur.com/v9DAouD.jpg

Interesting & surprising, too. The short cable looks as if would connect to the blue socket, too (alternately to the 40pin terminator).

[nocash]

I've scribbled down the part numbers from the DTL-H2000 PCB scans
http://upload.wikimedia.org/wikipedia/c ... PU2_01.jpg
http://upload.wikimedia.org/wikipedia/c ... PU1_01.jpg

Code: Select all

DTL-H2000 CPU Board
  CL825 20pin pin test points (2x10 pins)
  CL827 20pin pin test points (2x10 pins)
  U83   64pin SEC KM4216V256G-60 (DRAM 256Kx16) ;VRAM
  U84   64pin SEC KM4216V256G-60 (DRAM 256Kx16) ;VRAM
  CL828 20pin pin test points (2x10 pins)
  CL826 20pin pin test points (2x10 pins)
  X10    4pin JC53.20 (PAL, 53.203425MHz)
  X2    ? pin ?? (NTSC?, 5?.???MHz)
  U62   20pin logic?
  U27   64pin Sony CXD2923AR    ;GPU'b
  CL813 20pin pin test points (2x10 pins)
  CL814 20pin pin test points (2x10 pins)
  U16  160pin Sony CXD8514Q     ;GPU'a
  X?    ? pin 67.73760 MHz
  CL807 20pin pin test points (2x10 pins)
  CL809 20pin pin test points (2x10 pins)
  CL?4? 20pin pin test points (2x10 pins)
  U801 208pin Sony CXD8530BQ    ;CPU
  U11   28pin SEC KM48V2104AJ-6 (DRAM 2Mx8) ;Main RAM
  U10   28pin SEC KM48V2104AJ-6 (DRAM 2Mx8) ;Main RAM
  U9    28pin SEC KM48V2104AJ-6 (DRAM 2Mx8) ;Main RAM
  U8    28pin SEC KM48V2104AJ-6 (DRAM 2Mx8) ;Main RAM
  ?    100pin Blue connector (to other ISA board)
  U66   48pin ?
  U65   48pin ?
  U34   48pin ?
  U?   100pin Sony CXD2922Q     ;SPU
  U63   14pin logic?
  U32   44pin SEC KM416V256B1-8 (DRAM 256Kx16)  ;SoundRAM
  CL801 20pin pin test points (2x10 pins)
  CL802 20pin pin test points (2x10 pins)
  ?      3pin voltage stuff?
  U31   20pin logic? 74ACT2xx?
  U35   18pin OKI M6538-01 (aka MSM6538-01?) (audio related?)
  U36   20pin Sanyo LC78815  ;16bit D/A Converter
  U36    8pin ?
  J806   8pin solder pads...
  J805   9pin solder pads...
  J804  10pin solder pads... (11pins, with only 10 contacts?)
  ?     48pin solder pads (12x4pin config jumpers or so)
  U26   20pin logic?
  U?    24pin Sony CXA1xxxx?  ;RGB?
  ?      9pin PAL/NTSC jumpers (three 3pin jumpers)
  J801  24pin solder pads...
  J803   9pin rear connector: Serial Port (3.3V) (aka "J308") (DB9) (5+4pin)
  J802  15pin rear connector: AV Multi-out   (5+5+5pin)
  CN881 98pin ISA Bus Cart-edge (2x31 basic pins, plus 2x18 extended pins)

DTL-H2000 PIO Board
  ?     68pin Black connector...?
  ?      5pin solder pads...
  U371? 40pin HN27C4000G-12 (512Kx8 / 256Kx16 EPROM) (sticker: "94/7/27")
  U370  84pin Altera EPM7160ELC84-12 (sticker: "U730, cntl 1")
  U3    14pin logic?
  U43   44pin Altera EPM7032?LC44-10 (sticker: "U43, add 1" ?)
  U716  28pin Sharp LH5498D-35 (FIFO 2Kx9)
  U717  28pin Sharp LH5498D-35 (FIFO 2Kx9)
  U7?   28pin Sharp LH5498D-35 (FIFO 2Kx9)
  U719  28pin Sharp LH5498D-35 (FIFO 2Kx9)
  U724  20pin logic?
  U?    20pin logic?
  U?    20pin logic? 74FCT244Axx ?
  U732  48pin ...?
  U711? 20pin logic?
  U712  20pin logic?
  U713  20pin logic 74HC244AP
  U714  20pin logic 74HC244AP
  U721  20pin logic?
  U55   14pin logic?
  U726  20pin logic?
  U715  20pin logic 74HC244AP
  ?    100pin Blue connector (to other ISA board)
  U738  20pin logic? (SMD)
  U734  32pin KM684000G-7 (SRAM 512Kx8)         ;?
  U733  32pin KM684000G-7 (SRAM 512Kx8)         ;?
  U721  20pin logic? (U721 or U710 or U725 ?)
  S700  24pin 12bit DIP switch  (select I/O Address bits A15..A4)
  JP700  8pin Jumper (4x2 pins) (select IRQ15/IRQ12/IRQ11/IRQ10)
  JP7xx 12pin Jumper (3x4 pins) (select DMA7/DMA6/DMA5)
  U64   48pin ...?
  U65   48pin ...?
  U66   48pin ...?
  U737  48pin ...?
  U710? 20pin logic?
  U709  20pin logic?
  U?    14pin logic?
  U2    14pin logic?
  U1     8pin Dallas DS1232 (MicroMonitor Chip) ;power-good-detect ?
  U708  20pin logic?
  X?     ?pin 4.1900
  U42   80pin SUB-CPU (with piggy-back 32pin EPROM socket)
  U42'  32pin 27C256A-15 (EPROM 32Kx8) (sticker: "94/11/28")
  U706   ?pin slim chip with 1xN pins?
  BT700  2pin battery (!) (not installed)
  U729?  5pin voltage stuff?
  U40    8pin Dallas Dxxxxx ?
  X4     2pin small crystal (32.768kHz?)
  ?     34pin Black connector...?
  U736  28pin Sony CXK58257ASP-70L (SRAM 32Kx8)         ;CDROM Sector Buffer?
  U735 100pin Sony CXD1199BQ    ;CDROM Decoder/FIFO
  ?     40pin Blue connector... to external CDROM drive?
  ?      9pin rear connector: Joypad/Memcard 2 (DB9)
  ?      9pin rear connector: Joypad/Memcard 1 (DB9)
  ?      -    rear hole for cable to Blue 40pin connector?
  J70x  98pin ISA Bus Cart-edge (2x31 basic pins, plus 2x18 extended pins)

Which is, well, crap. For half of the components I couldn't decipher their part numbers. Most of the unidentified 14pin-20pin chips are probably 74xxx logic chips. No idea what the eight unidentified 48pin chips are used for (maybe 3.3V/5V level shifters, or bus switches for direct access from 80x86 to MainRAM/VRAM/SoundRAM?). And, I am still unsure if there are further components hiding on the back sides of the PCBs. Better PCB scans would be really nice!!!

The CPU board is more or less resembling PU-7 or early PU-8 playstation main boards (with CPU, SPU, and with GPU split into two chips, and with 8MByte Main RAM instead of only 2Mbyte).

The PIO board contains CDROM and some special features...

Solder pads for battery: Might confirm the RTC theory... maybe there is actually a RTC chip installed (U40 part number would be interesting).

40pin BIOS EPROM: This might be some revision of the normal PSX BIOS. Did anybody dump that EPROM?

32pin SUB-CPU BIOS EPROM (mounted on top of the SUB-CPU chip): Oh yeah... I wonder if the psxdev.ru guys knew about that chip when they decapped/dumped to SUB-CPU BIOS ROM from retail PSX boards. Dumping the EPROM version would have been ten million times easier.
But EPROM dump would be still interesting since it does probably differ from retail version (probably without SCEx checks for CD-R compatibility, and maybe... with RTC support). Did anybody dump that EPROM?

68pin connecter in upper-left, and 34pin connector in upper-right: Any ideas what those two connectors are intended for?

EDIT: The 68pin connector might be same as the 68pin "Parallel I/O" expansion port on retail PSX consoles (the connector is having a slightly different shape though). And the 34pin connector might be related to the internal CDROM Emulator ISA cart (as also mentioned below).

Altera chips and FIFO chips... must be something debugging related since retail PSX doesn't have those. NB. I couldn't find the DUART chip on the PCBs (the PSX BIOS contains code for using DUART for debug messages - but the DTL-H2000 seems to use different hardware for that purpose, possibly that Altera chips).

For the CDROM, there is only the CXD1199BQ, but no CXA1782BR+CXD2510Q chips - though maybe those chips do exist in the external CDROM Drive (?)
Alternately to the external CDROM Drive, there appears to be also a CDROM Emulator ISA cart from SN Systems. Does anybody know where that thing is connected to? My guess would be: To the blue 40pin socket in lower right, just like the external drive?
EDIT: Or, maybe the CDROM Emulator connects to two ports: To the blue 40pin socket (lower-left of PIO board), and additionally (or alternately?) to the black 34pin socket (upper-right of PIO board). I am just guessing - the connectors/cables could be wired that way - but I've no idea if it was intended to do that (?)

[Administrator]

There is room for a RTC. I too suspect that the PSX was going to have an on-board clock.

No. As far as I know, no one has dumped it. It does contain the BIOS though.
I would dump it, but my EEPROM reader/writer has killed itself.

I assume the Altera MAX and its configuration chip are glue logic for the SCSI transmission.

Correct. The additional CD-ROM drive I showed in the links above contain these chips.

Please check your email NO$CASH. I sent one a few days ago

[nocash]

There is room for a RTC. I too suspect that the PSX was going to have an on-board clock.

I didn't see any empty space for extra chips on the DTL-H2000 boards. If it can have a RTC, then it is most probably installed. My guess would be the small 8pin U40 chip (next to the small blue socket). Do you have the PCBs at hand, and could check its part number?

No. As far as I know, no one has dumped it. It does contain the BIOS though.
I would dump it, but my EEPROM reader/writer has killed itself.

Too bad. The Main CPU BIOS (40pin EPROM) could be dumped easily via printf messages (if you've the ISA boards installed in PCs).
The Sub CPU BIOS (32pin EPROM) would be require to be plugged into some special hardware with matching socket (having EPROM burner in the neighborhood would be easiest, or NES cartridge or PC mainboard or ISA cart or whatever with matching EPROM socket might also do it with some trickery, but then you might need special software for misusing the hardware that way).

NB. could anybody help me getting registered at assemblergames.com? There seem to be a lot hardware collectors who might be able to help. But everytime when I try to register at that forum, I am just getting told that I will receive an activation email - which is never happenening (before anybody asks: no, I don't use spam filters).

I assume the Altera MAX and its configuration chip are glue logic for the SCSI transmission.
Correct. The additional CD-ROM drive I showed in the links above contain these chips.

Isn't SCSI some higher-level command based packet transfer protocol? As far as I know, the retail PSX doesn't use any such protocol. If the DTL-H2000 and external DTL-H2010 cdrom drive are using the same chipset as PSX then they shouldn't use SCSI either, or am I wrong there? However, there appears to be a CD Emulator (DTL-S510B) which is actually having a "SCSI" sticker on the rear DB-25 connector. I can't grasp if/why/where the DTL stuff is using SCSI or not.

[nocash]

I have not been able to easily trace the pins, but one of the pins actually connects to a sealed pack of resistors, and then an IC (PCB: NL729 | IC: SN74ALS244BN) on pin 15 I believe. To actually trace the connections correctly, the entire PCB would need to be cleaned of all parts and sanded down to reveal the traces and vias since Sony added a good soldermask to cover all the linkages. The jumper is only needed for enabling the SPU.

I can't find NL729 on the PCB scans. The actual chip should be probably called "Unnn" (whilst "NLnnn" seems to be used for capacitors, dunno why they are called "Cnnn", which would be more common).
Yup, the green solder stop layer seems to hide any wires. Might be even a multilayer PCB coated with a ground layer. If you have an idea where a wire might connect to, then you could use a multimeter to check for 0 ohm connections (in case you didn't already do so).

The CDROM Connector Terminator seems to shortcut Pin23 and Pin26 (aka wire 23 and wire 26 on a 40pin ribbon cable).
Did you find out where the other pin goes to? Probably one of the pins is simply GND, or 3.3V or 5.0V.

Btw. what happens without that terminator? Does the PSX software hang on SPU access? Or does the PSX software work, but sound only with inaudible sound or distorted sound?

It isn't quite clear to me how the absence of the CDROM drive can affect the SPU. Maybe the SPU does require some (dummy) serial audio signal from the CD drive.

[Administrator]

DALLAS DS1232 945C21.

I will try to dump the BIOS from 0xBFC00000.

The people over at ASSEMbler Games wont help you much. The owner (ASSEMbler) is nothing more than a mere collector that is not interested in talking to people only if you wave a thousand dollars in his face for a copy of a prototyped CD-R Tekken.

As far as I know it was SCSI. I don't have the complete kit and so I am most likely incorrect. It's probably just a custom pass through cable that connects to the SCSI card which only connects to a SCSI HDD.

IC NL729 is marked on the back. I will scan the back of the cards tonight for you.

Yes, I attempted to check with a multimeter where the two pins go. I traced one back to a bank of resistors, and then to the NL729 IC on pin 15 I think.

Correct. If those two pins are not bridged, the SPU hangs in a wait state.

[nocash]

DALLAS DS1232 945C21.

Ah, I think that is the bigger Dallas chip (U1), some sort of a power-good-monitor chip.
The smaller Dallas chip (U40) is a bit more on the right, closer to the blue connector.

The people over at ASSEMbler Games wont help you much.

Uh, well, you never know. At least some collectors seem to be happy about sharing info/pictures about their collection. I would have wished to register that forum a bunch of times, but the best interaction I could get was that it has crashed my browser or that it told me to wait for that mysterious activation email : - /
Though, since I didn't receive your email last week either... maybe there's a problem on my side. I tried registering that forum with two email accounts from two different providers though. Anyways.

As far as I know it was SCSI. I don't have the complete kit and so I am most likely incorrect. It's probably just a custom pass through cable that connects to the SCSI card which only connects to a SCSI HDD.

There's also an SCSI HDD in the devr's setup? I didn't find photos of that yet.
I was thinking that it might stream data from the normal C:\ or D:\ drives, instead of using a separate (external?) drive specifically for the CDROM emulation.

IC NL729 is marked on the back. I will scan the back of the cards tonight for you.

Oh, cool. If you are there, please scan front sides, too!
Are you sure "NL729" is an IC? I would still think that it's meant to be the ceramic capacitor close to the IC.

[Administrator]

Just wanted to also share that the controllers will hang if you don't have the SPU terminator either and you use the SPU library functions. I have not looked into it extensively, but I thought I would give a warning should someone have the same problem.

[nocash]

Found another hires picture of the DTL-H2000 boards: https://farm5.staticflickr.com/4024/426 ... 4f56_o.jpg
The U40 part number isn't legible on the photo, but U40 (the small 8pin chip near the smaller blue connector) is clearly a DALLAS chip.
There are definetely two 8pin Dallas chip on the board: a big one (U1), and a small one (U40). Does anybody have DTL-H2000 boards, and could scribble down the part number of the smaller chip (U40)? That is: Not the part number of the bigger one (U1)!
The bigger Dallas chip is a DS1232, its chip name is legible a various photos, so that part number is already known. In case of doubt (if you are unsure which chip is bigger/smaller): Write down part numbers of both Dallas chips (big and small), but please don't miss the the smaller chip. Asking because the Dallas chip (the smaller one) is close to some clock oscillator, and it would be fun to know if small Dallas chip is a RTC.

PS. Here's a picture of the big dallas chip. This is not the small dallas chip:

DTL-H2000 dallas chip (snippet).jpg

[nocash]

Got it! Got it! Got it! http://lorezan.free.fr/ps1/scans%20dtl- ... -h2500.rar - 300dpi scans for DTL-H2000 and DTL-2500, each with front+back sides. The Dallas chip (the smaller one (ie. not the bigger one)) on DTL-H2000 is a DS1302S real time clock. Phew. That was difficult to get that part number - it must have been Sony's best kept secret ever ;- )