91
Famicom/NES / Re: How to get dumped roms into a useful format?
« Last post by NewRisingSun on November 20, 2025, 09:33:58 AM »It reads stuff from some kind of serial ROM into RAM at E00 and executes it.
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92
Famicom/NES / Re: How to get dumped roms into a useful format?
« Last post by bewilderbeest on November 19, 2025, 07:35:45 PM »I got some more information.
Turns out that the dump's SHA1 itself matches the one in MAME as the 36pcase device, which is currently non-functioning.
Yes, it's a VT369, but there's a bunch of extra registers all through 0x41xx. I can't tell whether these simply aren't in https://www.nesdev.org/wiki/VT02%2B_Registers or whether it's a VT369 derivative. I've identified the LCD backlight switch, for example, on 0x4144 and 0x4146. The MAME source does describe some of these extra registers but not all of them. Is there any good source for VT369 documentation? The MAME source describes way more registers than any of the wikis.
If it's a VT369 then it'll be starting up from the internal mask ROM, which makes sense from what I'm seeing sniffing the SPI. I'm going to try and dump this; I've no idea if it's different to any of the other dumps around. Maybe that'll make MAME emulation work. I'm hoping there isn't an internal I2C device in the blob; looks like some VT369s have this.
Also, I broke the screen. Dammit.
Turns out that the dump's SHA1 itself matches the one in MAME as the 36pcase device, which is currently non-functioning.
Yes, it's a VT369, but there's a bunch of extra registers all through 0x41xx. I can't tell whether these simply aren't in https://www.nesdev.org/wiki/VT02%2B_Registers or whether it's a VT369 derivative. I've identified the LCD backlight switch, for example, on 0x4144 and 0x4146. The MAME source does describe some of these extra registers but not all of them. Is there any good source for VT369 documentation? The MAME source describes way more registers than any of the wikis.
If it's a VT369 then it'll be starting up from the internal mask ROM, which makes sense from what I'm seeing sniffing the SPI. I'm going to try and dump this; I've no idea if it's different to any of the other dumps around. Maybe that'll make MAME emulation work. I'm hoping there isn't an internal I2C device in the blob; looks like some VT369s have this.
Also, I broke the screen. Dammit.
93
Famicom/NES / Re: miscellaNEouS files
« Last post by forgotusername on November 19, 2025, 01:13:24 PM »A pretty random duology here, but I don't believe I've published them before:
*The current extract of Gem (Mowing variant) is a bad dump, and does not run correctly when applied to a multicart menu. I have attached a good dump from the base ROM data of the Retro Arcade FC A6Plus.
*I created a custom hack of Fruit Tree (Toy Factory variant) that makes actual sense to play. In the original game, all of the colored pots are not color-coded to the falling fruits; meaning that you'd have to memorize an illogical pattern of mismatched colors to play. In the attached version, the fruits are properly color-coded to match the pots.
*The current extract of Gem (Mowing variant) is a bad dump, and does not run correctly when applied to a multicart menu. I have attached a good dump from the base ROM data of the Retro Arcade FC A6Plus.
*I created a custom hack of Fruit Tree (Toy Factory variant) that makes actual sense to play. In the original game, all of the colored pots are not color-coded to the falling fruits; meaning that you'd have to memorize an illogical pattern of mismatched colors to play. In the attached version, the fruits are properly color-coded to match the pots.
94
Famicom/NES / Re: miscellaNEouS files
« Last post by forgotusername on November 19, 2025, 01:03:27 PM »Here are the unique games ripped from the "G3" 800-in-1 handheld. This console had a staggering amount of undumped Nice Code variants, including some that were entirely undocumented. Some of the more notable titles include "Fishing Challenge" (an advanced variant of Atlantic Fishing Tournament 2005), "Boat-Race-Pika" and "Teletubb" (uncommon Inventor hacks), and a few games which were previously only known to appear in Timemax-affiliated game sets. In addition to these games, a lot of the variants here are quite subtle; most of them have been added to the wiki, though I can clarify further information if needed.
The extracted games are attached below; I have also included a few ROMs that are altered to restore copyrights and whatnot.
The extracted games are attached below; I have also included a few ROMs that are altered to restore copyrights and whatnot.
95
Famicom/NES / Re: miscellaNEouS files
« Last post by forgotusername on November 19, 2025, 12:46:10 PM »A bit late here, but thank you for analyzing the Smart Millionaire code. Does correcting question 645 by HEX seem to fix performance in any way? It seems to crash after the fourth question in "Player Mode" every time I start a new game, including in MAME.
a Handheld with an VT369 and an SD Card? i wonder if i could run other VT369 NES Roms such as Wave Tiger by Cubetac on this?Going by the games included, I would imagine it only works with ROMs that use separate CHR-ROM, whereas most originally-programmed VT369 games (including the Wave Tiger example) use CHR-RAM. I don't have a unit to check myself, though.
96
1984-1992 / Re: Mario al basha's adventures
« Last post by bootlegbastard on November 18, 2025, 07:49:58 AM »That isn't currently dumped yet. Well technically it is, but not shared publicly. https://bootleggames.fandom.com/wiki/Al_Basha's_Adventures
97
Famicom/NES / Re: How to get dumped roms into a useful format?
« Last post by bewilderbeest on November 17, 2025, 02:21:44 PM »Sure --- attached (without the header).
The PRG ROM it uses at startup is at 0x7c000-0x7ffff, and it's clearly accessing the VTxx extended registers for stuff like memory map configuration, so I'm relatively sure it's a VT369. There's also a chunk of code at 0x76000 which looks like it's loaded/mapped at 0x6000. But it may be more complex than that. Sniffing the SPI flash bus shows a startup sequence which looks like it's initialising the SPI flash in software, which means there might be a mask ROM inside the blob in addition to the SPI flash. This means there could be an extremely non-standard handoff between the internal ROM and the SPI flash; there's certainly no code at 0x00000-0x03fff.
The PRG ROM it uses at startup is at 0x7c000-0x7ffff, and it's clearly accessing the VTxx extended registers for stuff like memory map configuration, so I'm relatively sure it's a VT369. There's also a chunk of code at 0x76000 which looks like it's loaded/mapped at 0x6000. But it may be more complex than that. Sniffing the SPI flash bus shows a startup sequence which looks like it's initialising the SPI flash in software, which means there might be a mask ROM inside the blob in addition to the SPI flash. This means there could be an extremely non-standard handoff between the internal ROM and the SPI flash; there's certainly no code at 0x00000-0x03fff.
98
Famicom/NES dumps / Re: [2025] Some new dump roms～
« Last post by Y2K05 on November 16, 2025, 10:51:34 PM »Yeah many thanks ggdjr because us outside of China can't access that place
99
Famicom/NES / Re: How to get dumped roms into a useful format?
« Last post by SF-Human on November 16, 2025, 09:43:57 PM »Can you put up the ROM you've dumped there? It would be useful to figure out what mapper it runs on and create a header for it if a ROM is available.
100
Famicom/NES / How to get dumped roms into a useful format?
« Last post by bewilderbeest on November 16, 2025, 04:10:30 PM »I'm pulling apart a 36-in-1 phone case thing which plays NES games. I've dumped the ROM and have got as far as figuring out that it's some late VTxx device, possibly a VT369, with the ROM on SPI flash connected via a 90MHz (!) SPI bridge. This makes it quite interesting because it's relatively easy to reprogram.
I gather that emulators like Nintendulator stand a chance of playing this, depending on the details of the implementation, but I've found that Nintendulator insists on there being a valid .nes header on the top of the image. What's the right header to put on something like this?
Thanks!
I gather that emulators like Nintendulator stand a chance of playing this, depending on the details of the implementation, but I've found that Nintendulator insists on there being a valid .nes header on the top of the image. What's the right header to put on something like this?
Thanks!