Releases · emu-russia/breaks

08 Mar 17:56

f70d2d6

MOS 6502 Decoder dump from HDL model Latest

Latest

Wrote a small HDL test bench that goes through all the decoder inputs and outputs the values of all 130 outputs for each combination of inputs.

The lower six bits of input vector represent the Tx. The remaining high bits are IR.

The numbering of the outputs corresponds: https://github.com/emu-russia/breaks/blob/master/BreakingNESWiki_DeepL/6502/decoder.md

Note the special 129th output ("pp") (it occurs twice in the real processor), and that the decoder does not use /PRDY and IR0, which in the real processor are hardcoded directly into the PLA matrix.

It can be used to verify your 6502 designs.

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22 Jan 23:20

ogamespec

apu-hdl-1

6afd3e0

APU HDL Release 1.0

Topological masks were reconstructed from the chip photo
Transistor circuits were reconstructed from topological masks
Transistor circuits were converted into logic circuits (gates)
Logic circuits were formalized on Verilog

Also inside the archive is the Test Bench for Icarus Verilog, which was used for verification.

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29 Jul 07:50

ogamespec

ppu-book-revB8

db02b61

Breaking NES Book - PPU, Revision B8

Незначительные корректировки раздела RGB PPU. Книга готова к печати.

Minor adjustments to the RGB PPU section. The book is ready for printing.

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26 Jul 11:30

ogamespec

pal-datasets-revisited

7b44ebb

Revisited PAL APU/PPU datasets

https://drive.google.com/drive/folders/1krPSvQxy3BiufPym6Mug__Ywze0QphmL?usp=sharing

Я сделал небольшую ретроспективу датасетов RP2A07/2C07. Собрал все данные, сшил что не было сшито до этого.

Всем исследователям PAL версий чипов будет интересно.

Чипы истерзаны временем и мною, но фотки позволяют извлечь все нужные данные.

Примечание по RP2C07(PPU): Чип для исследования я брал на eBay, он оказался нерабочим (горелым). Поэтому там справа внизу такой большой кусок грязи. Во то время я ещё не умел чистить чипы в ацетоне, поэтому так. Но очень удачно получилось, что там находится Data Reader, который топологически практически идентичен NTSC PPU, так что можно не волноваться.

I did a little retrospective on the RP2A07/2C07 datasets. Collected all the data, stitched what was not stitched before.

All researchers of PAL versions of chips will be interested.

The chips are tormented by time and by me, but the pics allow you to extract all the data you need.

Note on RP2C07(PPU): I got the chip for the study on eBay, it turned out to be non-working (burned). That's why there is such a big piece of dirt on the bottom right. At the time I didn't know how to clean chips in acenton yet, so that's how it is. But very fortuitously there is a Data Reader there, which is topologically almost identical to the NTSC PPU, so you don't have to worry.

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