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Naoki
Reged: 11/10/09
Posts: 1998
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Naomi board layout in C file
#248834 - 03/14/11 07:10 PM


Just a quick thing, probably known about but with Guru's read me on the board layout he list's the SH4 under the larger heatsink:

Code:


57 |---------------------------------------------------|
58 | CN1 CN3 |
59 |PC910 62256 EPF8452AQC160-3 |
60 | BATTERY EPC1064 JP4 3771 93C46 |
61 |A179B 315-6188.IC31 3771 3773|
62 |ADM485 BIOS.IC27 5264165 5264165 |
63 | 5264165 |-----| 5264165 |
64 | CN3 |POWER| |
65 | |VR2 | 33.3333MHZ |
66 |CN26 |-----| 27MHZ|
67 | CY2308SC-3|
68 | KM416S4030 |------| HY57V161610 |
69 | | SH4 | HY57V161610 |
70 | C844G 315-6232 | | 32MHZ |
71 | 33.8688MHZ |------| HY57V161610 |
72 | xMHz HY57V161610 |
73 | PCM1725 JP1 62256 |
74 | HY57V161610 |
75 | HY57V161610 |
76 | 315-6145 |
77 |CN25 CY2308SC-1 315-6146 |
78 | LED1 93C46 |
79 | LED2 14.7456MHZ |
80 |---------------------------------------------------|



However on the board (Or atleast my one anyway), IC1 is the SH4 under the smaller silver heatsink, not the PowerVR 2. Just thought I'd say, so sorry if it's known about.

Edited by Naoki (03/14/11 07:14 PM)



----
On a quest for Digital 573 and Dancing Stage EuroMix 2

By gods I've found it!



f205v
Dumper
Reged: 09/21/03
Posts: 193
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Re: Naomi board layout in C file new [Re: Naoki]
#248929 - 03/15/11 06:00 PM


Yes, you are right.
Also, in the naomi.c file the top right connector is called CN3, while on the real board it's CN2

I need to open and clean both my NAOMI1 and my NAOMI2 boards, when I get to it I'll take better pictures and update naomi.c accordingly.



Ciao
f205v



Naoki
Reged: 11/10/09
Posts: 1998
Loc: United Kingdom
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Re: Naomi board layout in C file new [Re: f205v]
#248932 - 03/15/11 06:33 PM Attachment: IMGP0062.JPG 1808 KB (0 downloads)


Mine is mostly clean but there'sa few specs of dust I wanna clear. I could have provided photo's of the chips if wanted.

Also, did you mean the cartridge connector? If so, the top right connector (Filter board to the left) is labelled CN3, but then mine also is a Revision B board.

And this picture I couldn't get any better without losing detail on the text. Without the flash it's too blurry, with it it's blinded a spot. Zooming in on the board losses readability in text, to close, well, you can see:

[ATTACHED IMAGE - CLICK FOR FULL SIZE]

Attachment

Edited by Naoki (03/15/11 08:05 PM)



----
On a quest for Digital 573 and Dancing Stage EuroMix 2

By gods I've found it!



f205v
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Re: Naomi board layout in C file new [Re: Naoki]
#248962 - 03/15/11 11:37 PM


Soory, a small mistake from my side.
I was referring to the cartridge connector close to the BIOS eprom.

If you want to take good PCB pictures go for this:
"The first step is to take pictures of the PCB; prepare a place that will become your "studio", I like very much to take pictures of PCBs while they are vertically laying against a wall, some other prefer to take pictures with the PCB flat on the ground. In both cases use a monocolour, flat, opaque, neutral background; avoid plain white, it will reverberate back to the camera; avoid multicolours tiles, they usually shine and tend to alterate camera contrast; eventually you can use for your background a brown paper of the kind used to wrap up delivery parcells. If you take pictures of a vertical PCB use a tripod, even a very small one to hold the camera; if you do not have a tripod, put the camera at the same heigh of the PCB, possibly resting over some books with a rigid cover; do not hold the camera in your hands because it's much more easy to "move" the picture. If you take picures of an horizontal PCB use a tripod again, of the kind with the tilting head to hold the camera horizontal as well; if you do not have a tripod hold the camera in your hands, tray to stay over the PCB with your legs slightly open, and hold your breath while taking the picture; if possible try to lay against a wall, this will help you to remain steady. The lighting of your "studio" is very important: the best possible source of light is the sun, but it's not always available, therefore a very good alternative is a couple of halogen lamps of about 300-500W, illuminating the PCB from a few meters away. The very important thing is to avoid direct lighting of the PCB, but to illuminate it with light reflecting out of the walls and ceiling, resembling as much as possible the natural ambient light. NEVER use the flashlight incorporated into your camera, because it will reflect back from the PCB and "blind" the picture. A good thing is to clean the PCB from dust before taking pictures; if the PCB is very dirt, at least clean the surface of the ICs with a soft slightly humid cloth, so that markings and labels are clearly visible. Remember to take pictures of both sides of the PCB (components and solder), if the PCB consists of different boards packed one over the other, separate them and take pictures individually."



Ciao
f205v



R. Belmont
Cuckoo for IGAvania
Reged: 09/21/03
Posts: 9716
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Re: Naomi board layout in C file new [Re: f205v]
#249206 - 03/18/11 05:10 PM


To get the best top-notch PCB pictures, take them outdoors in full sunlight - Guru told me that trick, and it really works.



apeman
Surfer
Reged: 09/22/03
Posts: 129
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Re: Naomi board layout in C file new [Re: Naoki]
#249219 - 03/18/11 08:06 PM


Another trick you can use to avoid flash "blind spots" is to move away from the PCB a bit and use your camera's zoom to fill out the frame. The distance will soften the flash a bit. It works for me when I'm taking pics after the sun's gone down...



Naoki
Reged: 11/10/09
Posts: 1998
Loc: United Kingdom
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Re: Naomi board layout in C file new [Re: apeman]
#249226 - 03/18/11 08:32 PM


I tried and lost the writing on the chips



----
On a quest for Digital 573 and Dancing Stage EuroMix 2

By gods I've found it!



Naoki
Reged: 11/10/09
Posts: 1998
Loc: United Kingdom
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Re: Naomi board layout in C file new [Re: R. Belmont]
#249227 - 03/18/11 08:33 PM


Next time I get a chance I'll try that.



----
On a quest for Digital 573 and Dancing Stage EuroMix 2

By gods I've found it!



StilettoAdministrator
They're always after me Lucky ROMS!
Reged: 03/07/04
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Re: Naomi board layout in C file new [Re: Naoki]
#249229 - 03/18/11 08:47 PM


> I tried and lost the writing on the chips

MAMEDEV ALWAYS wants the writing on the chips. Or at least I do.
(and let this be a notice to AntoPISA hehe)

- Stiletto



Naoki
Reged: 11/10/09
Posts: 1998
Loc: United Kingdom
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Re: Naomi board layout in C file new [Re: Stiletto]
#249244 - 03/19/11 12:21 AM


I know, that's why I used the photo with the flash-spot, atlast you can read the writing XP



----
On a quest for Digital 573 and Dancing Stage EuroMix 2

By gods I've found it!



rtw
lurker
Reged: 09/27/05
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Re: Naomi board layout in C file new [Re: R. Belmont]
#249381 - 03/19/11 10:45 PM


To avoid the "pillow/cushion" effect zoom slightly into the image.



TheGuru
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Reged: 06/13/04
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Re: Naomi board layout in C file new [Re: rtw]
#249403 - 03/20/11 04:35 AM


> To avoid the "pillow/cushion" effect zoom slightly into the image.

yeah. more specifically the image goes barrel-shaped if the camera is too close so back off a little and use the zoom.
however none of that is required for NAOMI anyway as we already have HQ pics and info


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