nesdev.com

FM18W08 unit price: qty 1 28$, qty 1000 19$. Yikes, the only way those chinese can afford to put them in snes repros if they can pull them for free from some junked equipment. a part of cantonese did so: a certain number of countries transported electronic junk to china, a certain number of people ...

recycled FRAM and Flash ROM

Mario Baby

KS018/AC08/LH09 Green Beret

actually these 2 mappers do not have the same behavior.




http://forums.nesdev.com/viewtopic.php? ... 19#p243719

coolboy costs some registers at $500x or $600x to set a lot of parameters which would be used by the menu loader. the disadvantage is more logic elements have been taken. and the advantage is chr-data are also stored in prg-rom, danamically copied to chr-ram by menu loader. so dont need to seprate n...

full functional MMC1 will take almost 100 LEs: and the slim or customized MMC1 could be reduced to 72 LEs.

I reviewed this issue again because the write cycle of wram is too fast (<55ns), we need delay WRAM_CS for decades of nano-second. it can be solved by connecting a 4.7nF capacitor to the vcc on the WRAM_CS line

1. Detect the contact between goldfinger and slot 2. Check the power supply system of the console Although the DIP chip card is very expensive in China, it is only suitable for collection, because some of the large number of DIP chip CARDS are on low voltage machines, the execution is problematic 1...

2 modes

mode1: ciram_cs $2000-$27FF, cxram_cs $2800-2FFF
mode2: always disable ciram and connect /pa13 to cxram_cs

here's my understanding
it can be hardly emulated just by using a single cpld but not an fpga

there's no way to get a genuine RECCA from ebay or aliexpress, 99% are all fakes.

the only way is to go to Japan personally

another fake: fake TxROM.jpg if you thought this cart were genuine at the first glance, you are totally fooled. 1. the bus routings are not at equal spacing, espailly at the corner of them. 2. the corners of PCB routing are not curved. 3. still the pcb via(s), have no UV curable paint. 4. no stamp h...

this cart is distributed by Blazepro, which chinese name is "超技".

due to the bit width of lower cpu address bus(a0, a1), i guess this is some variant/enhanced of mapper268.

without any diode, this cart can not sustain its sram data for one week

the last 256K page needs to be mirrored to $FE00-$FEFF 256-byte suppose hardware reset never clears the internal RAM, the next steps might be meaningful： once the loader has finished copying code to ram, then set the mapper registers to map $FFFC-$FFFF to $6FC-$6FF, and never allow to write these r...