User contributions for Quietust

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  • 14:5414:54, 18 July 2022 diff hist +196 VRC6A #053330 VRC6 (harvested from a Madara cartridge) has been decapped and revealed to be an SLA7340 CMOS gate array, very similar to the NEC MMC3B/MMC3C current

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  • 14:4814:48, 23 June 2022 diff hist +7 Talk:VRC IRQmay as well include a link current
  • 14:4714:47, 23 June 2022 diff hist +1,933 N Talk:VRC IRQCreated page with "==VRC7== From the decapsulated VRC7 image we have available, I analyzed the implementation of the IRQ counter (with the help of the user SCSR on Discord, who traced the lower layers and allowed me to build a visual chip simulator for it) and have found the following: * The prescaler is actually implemented as 2 separate counters: one 2-bit that counts up to 2 before resetting and one 7-bit that counts up to 112 or 113 before resetting (with the condition <tt>((B0 | A1) &..."

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  • 15:1315:13, 14 April 2021 diff hist +69 m Emulator testsClarify why my emulator was used for the "known good" log - kevtris used it when he was writing the test, and its debug output is also reasonably detailed

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  • 16:5116:51, 6 August 2017 diff hist +324 N Talk:INES Mapper 036Created page with "What does "write $8000-$FFFF: copy RR to PRG banking pins" mean? Does that mean "copy RR to PP", or is it copying RR to some other internal register that's also updated during..."

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  • 11:4011:40, 8 September 2016 diff hist −5 m VRC4I don't "think" it does - it *actually* does, from Konami's own docs (which were originally posted at http://forums.nesdev.com/viewtopic.php?f=2&t=10611 )

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  • 13:3513:35, 10 July 2016 diff hist +91 CPU Test ModeAPU test mode is only present in the 2A03G (and possibly some earlier revisions), and the IRQ counter was only present in the original 2A03 (where pin 30 did nothing at all).

22 May 2016

  • 19:5819:58, 22 May 2016 diff hist −122 Emulator testsKevin Horton (kevtris) wrote nestest, and that's the official readme file for it. I've also just updated the "reference" logfile on my website to fix the JMP ($xxFF) error and also remove the (mostly-useless) scanline numbers

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