Author Topic: DUO/SCDR2 tech data  (Read 1018 times)

thesteve

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DUO/SCDR2 tech data
« on: March 15, 2014, 06:21:12 PM »
i have been pin mapping D91317GD (IC501 in the duo)

heres what i have so far updated 4/16/2014

its the signals between the huc6280 and the expansion mapper(DMA chip)

added ADPCM, SYS card and BUS control logic
« Last Edit: October 31, 2016, 11:22:35 AM by thesteve »

turbokon

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Re: DUO/IFU tech data
« Reply #1 on: March 18, 2014, 03:24:47 AM »
Good stuff, there is still lot I can learn from you:)


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thesteve

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Re: DUO/IFU tech data
« Reply #2 on: April 03, 2014, 05:09:26 AM »
updated

thesteve

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Re: DUO/IFU tech data
« Reply #3 on: April 16, 2014, 05:03:06 AM »
COMPLETE

thesteve

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Re: DUO/IFU tech data
« Reply #4 on: April 16, 2014, 03:52:39 PM »

NightWolve

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Re: DUO/IFU tech data
« Reply #5 on: April 16, 2014, 04:42:45 PM »
To help translate from steve to the layman on the usefulness of this work/thread:

Quote from: thesteve
If all i do with it is map the pins its helpful for IFU and duo repairs. The pins i mapped may make cdrom attachment possible from the HU card slot, as all pins were present.

Could be useful for mods and custom hardware later as well. I'm simply shedding some light on the black box of undocumented custom chips in the system.

If we understand the hardware, we can duplicate it using newer parts making exact replacements less important. Note that almost every pin was buffered making tracing them out not possible with a meter.

Keith Courage

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Re: DUO/IFU tech data
« Reply #6 on: April 16, 2014, 07:32:33 PM »
Absolute wizardry

esteban

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Re: DUO/IFU tech data
« Reply #7 on: April 17, 2014, 01:43:03 AM »

To help translate from steve to the layman on the usefulness of this work/thread:

Quote from: thesteve
If all i do with it is map the pins its helpful for IFU and duo repairs. The pins i mapped may make cdrom attachment possible from the HU card slot, as all pins were present.

Could be useful for mods and custom hardware later as well. I'm simply shedding some light on the black box of undocumented custom chips in the system.

If we understand the hardware, we can duplicate it using newer parts making exact replacements less important. Note that almost every pin was buffered making tracing them out not possible with a meter.



Thank you,this is the context I needed.

I know thesteve, and others, have been demystifying the hardware, but I'm too ignorant to to say "Thanks!" In a meaningful way. 

Thanks
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NightWolve

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Re: DUO/IFU tech data
« Reply #8 on: April 17, 2014, 02:16:53 AM »
Thank you, this is the context I needed.

Yeah, it's the result of my many interactions with him. ;) I have tried to serve as a context-provider on his behalf many times. Heh. He sent me a PM to check out this thread after posting it, so I look at it, see a few technical sentences and immediately wonder, "Um, what's the usefulness here ?? ... You didn't explain it for the average Joe, and even I don't know..." So I replied with, "So, what are the potential possibilities with this info ? What's the usefulness factor ?" and that's what got the response I finally pasted in here. I wanted to paste it here that day, a month ago, but didn't get around to it. Figured he'd eventually, on his own, expand on the significance of these findings, but nope, he didn't. ;) That's alright, that's our steve, the PCEFX MacGyver (think I found a title for 'im, too).

esteban

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DUO/IFU tech data
« Reply #9 on: April 17, 2014, 03:09:40 AM »
Oops!
« Last Edit: April 17, 2014, 03:52:53 AM by esteban »
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thesteve

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Re: DUO/IFU tech data
« Reply #10 on: October 30, 2016, 08:53:05 AM »
bump
can we get this stickied in the repair info section
it applies to DUO and SCDR2

Necromancer

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Re: DUO/IFU tech data
« Reply #11 on: October 31, 2016, 04:20:53 AM »
Done, but ya might want to change the thread title (original post title) to something more specific.
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Xenogears

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Re: DUO/SCDR2 tech data
« Reply #12 on: November 02, 2016, 07:51:02 AM »
@TheSteve - incredible job, assuming you measured Pin by Pin... I already claimed you Jedi-Knight and patience to the light side, it leads. I know, NEC would make you Master of the Council.  :dance:

thesteve

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Re: DUO/SCDR2 tech data
« Reply #13 on: November 02, 2016, 01:13:52 PM »
i measured pin for pin
note the main bus is all buffered
some of the pins were identified partly by how the signal worked