Worklog Lockdown 64

Akira

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It seems when I just turn it on, its more sensitive. When its has been running for 5 minutes, it won't crap out.
So maybe a bad old capacitor on the board itself?



I will try to add everything into a test case and do some more heat testing.



I also read people using RCA shielded cable for everything. Power and audio/video

There is a little hiss on the audio line with a pam8803 amp board i am trying

Thanks for your time and input!
 

Gman

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if it wasnt having this experience before I think it is most certainly due to the stability of the 48Mhz clock. The oscillators have a short limit to how far you can relocate them before they stop working well
 

Akira

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MX8330-pinout.png


1 FSO/5: Clock output. FSO divided by 5
2 GND: Ground
3 FSO: Rambus clock output. Rambus interface level.
4 Vdd: Power supply
5 OSCOUT: Crystal pin
6 OSCIN: Crystal pin
7 FSEL: Frequency select pin (High:FS0=17*4*FSC,
Low:FS0=14*4*FSC). Toggling of FSEL will reset the counter in the FEEDBACK DIVIDER.
8 FSC: Clock output. Crystal frequency divided by 4.


Pin 3 is Not connected
Pin 7 goes to a trace that has been cut and not needed
Pin 8 goes to a testpoint only

Should be doable and hopefully stable.
I need the space below the X1, so must be relocated.

All the above for a 1996 model PAL
 

Gman

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Pin7 is a delayed 3.3v signal to several components and is needed to be relocated
 

Gman

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Really? I traced it a few times now, it goes no where after the trim everybody does. This is on a PAL with a DENC NUS 1996 board.
Yes it connects between Pin7 of both clock generators and PIF pin8. Maybe this is source of instability?
 

Gman

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Ah I see. I believe on PAL this will be unconnected for frequency 50hz video. See on JP1, if this is jumpered, it will connect both Pin7s and set in 60hz mode. My mistake.
 

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Gman

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Happy that its cleared up.

I see you use a joystick for c buttons on your small n64. Any pro's or con's?
It feels more natural for the shooter games that use the C buttons for movement. Also it saves some space on the case. For games like OOT it is not so bad to use either. I think its a great solution.
 

Akira

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Update on this project



- Replaced all the capacitors with new ones

- Made custom heat sinks to make just that little more space

- Heat tested the system in the back half of the system, closed all the holes and let it run for 5 hours, without a single crash

- Optimized the space for the batteries.

- Ordered N64 Gmans digital audio amp from pcbway, ordered all the parts for it, and a programmer

- Created 1 - 2 switch snap on

- Removed all the paint from the old back piece, going to re-use it, took ages from 5-year-old paint.

- Remade the front piece and frankencased parts in it

- Decided on the color scheme, and ordered paint and parts

- First layer of prime...



Have a nice weekend

Foto 09-04-2021 18 02 43.jpg
 

Akira

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The two most powerful warriors are patience and time...



But i finished creating 5 board of 64 Amp.



- Finding all the parts, some were only available from some Chinese eBay seller..

- Soldering them up by hand..

- Making a programming cable for that insane small pin header on the board..

- Asking Gman a lot of questions..



All working, all tested! :mrgreen:


Foto 16-04-2021 17 39 19.jpg
 

fibbef

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It's really fun watching you work, Akira. And hooray for reviving old projects!
I peeked in on this thread specifically because I wanted to see what you used for a controller solution. 3rd party controllers haven't been working well for me and that's what really put my own 64p project on hold. I keep reminding myself that RDC has those mini controller boards, but I was hoping we'd see some controller emulation using a teensy or something like that.

Anyway, I'm looking forward to seeing this come together. That DMG shell looks amazing!
 

Akira

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Little setback, i tried one of those ali express front lens glass with small borders. they are 5.2mm tall
the space i got is 5.15mm, and not counting in paint/clear coat.

i measured a ali express replacement dmg shell, and they have a opening of 5.2mm....

I need to remove all the paint from front piece, make more space and repaint it..


WIN_20210425_16_38_26_Pro.jpg


These glass things are a little larger then stock...
 
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Emetsys

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I don't know much about glass, but if it is not tempered, could'nt you grind it?
 
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