Search found 511 matches

by aquasnake
Thu Mar 14, 2024 8:07 am
Forum: NES Hardware and Flash Equipment
Topic: N8 Pro NROM implementation
Replies: 8
Views: 655

Re: N8 Pro NROM implementation

There may be some issues with level shifters, where the ROM maintains the output of the data line during write timing, resulting in high current. In this case, the introduction of level shifters is more problematic than not installing them. From a hardware perspective, level shifter devices exacerba...
by aquasnake
Tue Mar 12, 2024 6:32 am
Forum: NES Hardware and Flash Equipment
Topic: N8 Pro NROM implementation
Replies: 8
Views: 655

Re: N8 Pro NROM implementation

The chr data of nrom is ROM, which means it is read-only, so connecting chr_oe to chr_ce is not a problem Write to chr ram under mapper 255, and once it enters mapper 0, it will be converted to read-only There will be no writing of chr $0000- $1FFF in nrom, as the original cartridge's may also be di...
by aquasnake
Tue Mar 12, 2024 6:22 am
Forum: NES Hardware and Flash Equipment
Topic: Strange multicart
Replies: 4
Views: 396

Re: Strange multicart

Try arranging in order of size

256PRG+128PRG+128'PRG+256CHR+128CHR+128'CHR
by aquasnake
Sun Mar 10, 2024 9:50 am
Forum: NES Hardware and Flash Equipment
Topic: Boot Up delay solution to prevent slowly configuration from FPGA.
Replies: 6
Views: 449

Re: Boot Up delay solution to prevent slowly configuration from FPGA.

methods to solve: 1. Modify the console and use a capacitor in parallel with reset button. 2. Do not use FPGA's global reset. Global reset requires a certain amount of reset time. Instead, use other GPIOs for reset, which will increase LUT consumption. Ensure that $E000-$FFFF are at the last BANK wh...
by aquasnake
Sun Mar 03, 2024 4:09 am
Forum: NES Hardware and Flash Equipment
Topic: MMC1 free implementation on CPLD released
Replies: 39
Views: 21978

Re: MMC1 free implementation on CPLD released

Different wiring does not cost any extra cells. But supporting all different wiring needs extra logic branches, the point is not for one single subset, but for the whole family by automatic heuristic recognition Blocking consecutive write is not simply the mapper's lockout function, it does not bloc...
by aquasnake
Fri Mar 01, 2024 10:26 pm
Forum: NES Hardware and Flash Equipment
Topic: MMC1 free implementation on CPLD released
Replies: 39
Views: 21978

Re: MMC1 free implementation on CPLD released

I still maintain my viewpoint that the MMC1 implemented by 64 macro cells is only a simplified subset, and it does not support IRQ (definitely), SUROM (perhaps), SZROM, SOROM, SXROM, SJROM, or/and SKROM. The MMC1 family is a complex collection, and implementing a complete MMC1 (including MAPPER #105...
by aquasnake
Mon Feb 19, 2024 8:05 pm
Forum: General Stuff
Topic: San Guo Zhi discussion
Replies: 5
Views: 326

Re: [NES] San Guo Zhi: Chi Bi Zhi Zhan - need help with hacking text output

"San Guo Zhi" sounds like "Sangokushi" [三國志], and I'm pretty sure that's on purpose. To what extent do the events of this game overlap those of either Koei's or Namco's Romance of the Three Kingdoms games? "Sangokushi" [三國志] is the Japanese pronunciation of kanji "...
by aquasnake
Mon Feb 19, 2024 7:42 pm
Forum: General Stuff
Topic: San Guo Zhi discussion
Replies: 5
Views: 326

Re: [NES] San Guo Zhi: Chi Bi Zhi Zhan - need help with hacking text output

Interestingly, the oversea version's setting of character name is sloppy and irresponsible. The sons and grandsons of Genghis Khan finally went to suppress him (Temujin), and I think even for the Mongols, they would feel inexplicable For an entertainment work, what else can be said? The script and s...
by aquasnake
Mon Feb 19, 2024 1:47 am
Forum: NESemdev
Topic: mmc5 exram
Replies: 14
Views: 951

Re: mmc5 exram

I don't know if my understanding is correct In 8x16_spr_mode: $5120- $5127: Set SPR bank registers, can be set to fill 8K total size $5128- $512B: Set BG bank registers, where the last 4K is the mirror image of the first 4K The problem is, how does mmc5 detect to switch SPR or BG banks??? chr_bank_s...
by aquasnake
Sun Feb 18, 2024 11:41 pm
Forum: NESemdev
Topic: mmc5 exram
Replies: 14
Views: 951

Re: mmc5 exram

1. set $5104 with #$0 2. set $5105 with #$24 3. write $2006 twice($2800-$2BFF) 4. write $2007 5. repeat 4, till 3rd nt is filled This is the method to maintain optimal compatibility It is recommended not to use CPU writing and ppu reading methods, as this will require actual hardware to emulate a tr...
by aquasnake
Sun Feb 18, 2024 10:52 pm
Forum: NESdev China
Topic: 关于NSF的nmi信号问题
Replies: 2
Views: 12056

Re: 关于NSF的nmi信号问题

他用两级74反向器和一些电阻电容实现了50Hz发生器代替了PPU的NMI输出给到cpu 当然,网络上有很多74门实现的 50/60Hz发生器,这很容易制作.由于只是CPU驱动播放NSF,并不涉及到精确的通讯传输,因此50/60Hz时钟的精度并不要求很高. He implemented a 50Hz generator using two-stage 74 inverters and some resistors and capacitors to replace the NMI output to the CPU. Of course, there are many 50/60Hz gener...
by aquasnake
Sun Feb 18, 2024 9:41 pm
Forum: Newbie Help Center
Topic: [NES] San Guo Zhi: Chi Bi Zhi Zhan - need help with hacking text output
Replies: 4
Views: 529

Re: [NES] San Guo Zhi: Chi Bi Zhi Zhan - need help with hacking text output

Please modify the title to the Japanese or Asian version (I prefer)

The names of the characters in the oversea version are all Mongolians', but the ending appears the Han Dynasty territory in China, which is inconsistent with history, may also affect some ethnic emotions
by aquasnake
Sun Feb 18, 2024 8:46 pm
Forum: NES Hardware and Flash Equipment
Topic: AV Famicom artifact ram poblem
Replies: 3
Views: 478

Re: AV Famicom artifact ram poblem

whats the error code displayed on the screen? for your reference: #define ERR_UNXP_STAT 0x40 #define ERR_UNK_ROM_FORMAT 0x41 #define ERR_PATH_SIZE 0x42 #define ERR_NAME_SIZE 0x43 #define ERR_OUT_OF_MEMORY 0x44 #define ERR_GAME_NOT_SEL 0x45 #define ERR_REGI_CRC 0x46 #define ERR_MAP_NOT_SUPP 0x47 #def...
by aquasnake
Sun Feb 04, 2024 2:00 am
Forum: NES Hardware and Flash Equipment
Topic: 632 in 1
Replies: 18
Views: 4126

Re: 632 in 1

漆科,这个卡我目前正在反向中, coolboy(M268),coolbaby(M473),coolgirl(M342)已经完全反向
by aquasnake
Sat Feb 03, 2024 7:06 am
Forum: NES Hardware and Flash Equipment
Topic: 632 in 1
Replies: 18
Views: 4126

Re: 632 in 1

852-in-1 sticker

free for use
maxresdefault (1).png
Is this somesense or nonsense?