FDS RP2C33 and Konami VRC VII decaps by digshadow
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- rainwarrior
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FDS RP2C33 and Konami VRC VII decaps by digshadow
Lord_Nigh shared these links on IRC earlier, and I thought the forums would be interested. These are Decap photos made by digshadow.
FDS RP2C33: http://siliconpr0n.org/archive/doku.php ... rp2c33_01a
Konami VRC VII: http://siliconpr0n.org/archive/doku.php ... vii_053982
Unfortunately the VRC7 instrument ROM is encoded with a process that doesn't make the bits visually distinct, so they are still a mystery, but I'm told there is a chemical process that might be used to reveal the information later on.
FDS RP2C33: http://siliconpr0n.org/archive/doku.php ... rp2c33_01a
Konami VRC VII: http://siliconpr0n.org/archive/doku.php ... vii_053982
Unfortunately the VRC7 instrument ROM is encoded with a process that doesn't make the bits visually distinct, so they are still a mystery, but I'm told there is a chemical process that might be used to reveal the information later on.
Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Any idea of where the functional groups are on each die, especially the two big solid boxes near the bottom of the 2C33?
- ExtraOrdinary
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Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Those dies could contain more transistors than the original chipset on the Famicom mainboard..
The two big chunks on RP2C33 could be the ROM mask for wavetable?
The two big chunks on RP2C33 could be the ROM mask for wavetable?
Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
As I understand, those actually contain the FDS BIOS itself - the "wavetable" for FDS sound is all RAM.ExtraOrdinary wrote:The two big chunks on RP2C33 could be the ROM mask for wavetable?
Incidentally, I've started tracing the RP2C33's metal layer - watch here for progress.
Last edited by Quietust on Fri Jan 16, 2015 9:58 pm, edited 1 time in total.
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- ExtraOrdinary
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Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Yeah, I totally forgot about the BIOS ROM
What type of RAM does this die include?
What type of RAM does this die include?
Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
www.qmtpro.com uses an invalid security certificate.Quietust wrote:watch here for progress.
The certificate is not trusted because no issuer chain was provided.
(Error code: sec_error_unknown_issuer)
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- rainwarrior
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Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Could have linked http instead of https, alternatively, if the https version is really just your private thing.
Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Whoops, forgot about that - switched it to http.
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- ExtraOrdinary
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Re: FDS RP2C33 and Konami VRC VII decaps by digshadow
Very valuable effort.. Thanks, Quietust