Famicom AV, PAL NES & Dendy chips decapsulation (progress!)
Posted: Sun Aug 30, 2015 12:36 am
Hi, nesdev!
I've contacted to http://zeptobars.ru/en/ project about half-year ago.
I gave to them some chips for decapsulation, and now we have first results.
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Chips:
RP2A03H - Famicom AV "rev H" CPU
RP2C02H-0 - Famicom AV "rev H" PPU
RP2C07-0 - French version PAL NES PPU
(PPU itself output is standard composite signal, but finally converted to RGB by special decoder on NES mainboard)
Red/green emphasis bits are swapped.
UMC UA6527P - Hybrid ("Dendy") CPU made by "UMC". I know it has better DPCM, timbre and overall sound quality than TA-03NP1, but has 25%<->50% duty cycles swapped
UMC UA6538 - Hybrid ("Dendy") PPU made by "UMC". I've confirmed red/green emphasis swap on it. It has more saturated palette than TA02-NP-6538 and RP2C07-0.
TA-03NP1-6527P - Hybrid ("Dendy") CPU made by "TA". I know it has worse timbre and buggy DPCM than UMC UA6527P, but has right dutycycles
TA-02NP-6538 - Hybrid ("Dendy") PPU made by "TA". It has red/green emphasis bits also swapped, as well as RP2C07-0 and UA6538.
-------------------------------------------------------------------------------------------------------------------------------------------------------------
First photos of UMC UA6538 PPU:
METAL LAYER: http://s.zeptobars.ru/UMC-UA6538-HD.jpg
If everything is clear with the current view, and it can be properly reversed, zeptobars will remove metallization layer and go ahead to the polysilicon.
I've contacted to http://zeptobars.ru/en/ project about half-year ago.
I gave to them some chips for decapsulation, and now we have first results.
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Chips:
RP2A03H - Famicom AV "rev H" CPU
RP2C02H-0 - Famicom AV "rev H" PPU
RP2C07-0 - French version PAL NES PPU
(PPU itself output is standard composite signal, but finally converted to RGB by special decoder on NES mainboard)
Red/green emphasis bits are swapped.
UMC UA6527P - Hybrid ("Dendy") CPU made by "UMC". I know it has better DPCM, timbre and overall sound quality than TA-03NP1, but has 25%<->50% duty cycles swapped
UMC UA6538 - Hybrid ("Dendy") PPU made by "UMC". I've confirmed red/green emphasis swap on it. It has more saturated palette than TA02-NP-6538 and RP2C07-0.
TA-03NP1-6527P - Hybrid ("Dendy") CPU made by "TA". I know it has worse timbre and buggy DPCM than UMC UA6527P, but has right dutycycles
TA-02NP-6538 - Hybrid ("Dendy") PPU made by "TA". It has red/green emphasis bits also swapped, as well as RP2C07-0 and UA6538.
-------------------------------------------------------------------------------------------------------------------------------------------------------------
First photos of UMC UA6538 PPU:
METAL LAYER: http://s.zeptobars.ru/UMC-UA6538-HD.jpg
If everything is clear with the current view, and it can be properly reversed, zeptobars will remove metallization layer and go ahead to the polysilicon.