niconiconi古董 #小霸王学习机 上电后毫无反应。我准备好万用表、示波器准备到处戳一戳，抓抓波形，结果发现是 DC 连接器 GND 焊盘铜箔断裂，10 秒飞线解决（搭接到了旁边的手柄接口焊盘，两者共用 copper pour）。但是这个手边仅有的古董黑白电视不能正常 VSYNC，只能看出有一个“小霸王”商标。这说明 CPU/PPU 能运行了，估计已经修好了，等待采集卡到来再试。#复古计算 #电子考古学 #小霸王
How to write code on your no-toolchain, no-documentation, and no-storage 1990s Chinese <del>totally-legal Famicom game console</del> educational home computer? No worries! You can find useful assembly routines on your own! Just dump the whole BASIC cartridge ROM via PEEK using this handy 6502 decoding script! 
The next section also gives you a typed-in ROM monitor. Absolutely disastrous learning experience. But you know it's truly only possible on a 6502 - the disassembler fits in just 4 pages. Steve Wozniak is going to either be amazed or have a heart attack if someone told him this was how 1990s home computers worked in China. #retrocomputing #小霸王学习机
The next section also gives you a typed-in ROM monitor. Absolutely disastrous learning experience. But you know it's truly only possible on a 6502 - the disassembler fits in just 4 pages. Steve Wozniak is going to either be amazed or have a heart attack if someone told him this was how 1990s home computers worked in China. #retrocomputing #小霸王学习机
How do pirated Nintendo N-in-1 game cartridges work? In the 1990s China, it was not a NESdev page for people with too much time, it was Serious Business! With its own textbook reviewed by EE professors at a top university. Because as we all know, they were for <del>game consoles</del> educational home computers, so the engineering knowledge is of uttermost importance! 
#retrocomputing #retrogaming #NES #小霸王学习机
#retrocomputing #retrogaming #NES #小霸王学习机
Original wiki page creator: "lawsuit filings should be researched in more detail"Challenge accepted. 
#retrocomputing #retrogaming #NES #小霸王学习机
#retrocomputing #retrogaming #NES #小霸王学习机
Fun fact: The full 6502 machine code of the NES game F1 Race was reverse engineered in China in 1994 by an independent developer 于春, who later wrote a 400-page NES programming textbook about it, making him a little-known NES ROM hacking and homebrewing pioneer worldwide, possibly one of the few NES experts in the world who didn't sign an NDA. Why? To make 8 millions of <del>Nintendo game console clones pretending to be</del> educational home computers in the country actually be educational as advertised. This was also the only surreal opportunity in the world for someone to become a national hero politically, for the service of REing Nintendo games. #retrocomputing #retrogaming #NES #NESdev #小霸王学习机
#NESdev time. Just ported GNU Unifont's ASCII bitmaps to the Nintendo PPU, with a "tile bitplane multiplexing" trick to keep the ROM under 2 KiB. So I can repeat the data 128 times in all banks to survive erroneous MMC3 bank switching. #retrocomputing #retrogaming #NES #小霸王学习机
Cleaned up the code for the CHR ROM tile multiplexing hack slightly. For those who're playing at home, here's the near-complete source. Confirmed working on my <del>Nintendo game console</del>Subor educational home computer. #retrocomputing #retrogaming #NES #NESdev #小霸王学习机
R@niconiconi is that HT7533 actually MLCC stable?
some datasheets show a feedforward capacitor, some don't, but almost all of them show a polarized capacitor in their application schematics, so i've always been too uncertain to use them
@r No idea, I didn't design or make the PCB, it's an open hardware project by an NES dev named "MUMU_FC", which was replicated and sold in China for like $5, so I just decided to purchase a random one and started using it. This may be a mistake, as I'm now fighting with the undocumented CPLD's bank switching behavior, author released no HDL source.
@niconiconi ah, that makes sense
i was assuming that you had designed it
it might be easier to just write your own CPLD logic?