The VTxx is an early series of systems-on-a-chip created by V.R. Technology. There are five known VTxx chips: VT01, VT02, VT03, VT09, and VT32, all of which are based on the Famicom core, albeit with improved hardware specifications. VTxx variants are used in almost all Famiclones released from the 2000s onward.

2022年3月9日 · V.R.T.'s website has datasheets for VT16- and VT18 chips that are merely VT09s with additional LCD controllers. The VT1682 and VT268 are not NES-compatible, even as their designs are inspired by it.

VT02 includes the CPU, Graphic Unit, Sound Unit, two internal 2KBytes SRAMs, and some I/O controller. There are two main systems in VT02, program system and video system. CPU plays the key role in program system. It can access the internal and external program memories. The program memory stores the program command, instructions, and sound data.

The company known as V.R. Technology later developed a line of NES clone chips with increasingly enhanced capabilities, the VT series. The main chips are the VT02, VT03, VT09, VT32 and VT369 and unlike UMC's offering, they were …

2024年10月27日 · ERS: External ROM chip selector / Power on Indicator / I/O in OneBus Mode /SFCCS: Swap the function of /CS0 and /CS1 when low /LCDEN: Enable LCD Output for Testing; REGx: Region Selector. All 0 = NTSC, All 1 = PAL; OBS: OneBus Mode Enable /16B: 16 bits data bus selector in OneBus Mode. A0 will decide the low byte or high byte of data on CPU D0-7

The VT02 console chip includes a CPU, graphics processor, sound generator, and I/O. It allows for display of 64 sprites and scrolling background images at 256x240 resolution with 4 colors or virtual 16 colors. The chip features 2K of internal program RAM and video RAM, and can access up to 32M of external memory.

2023年1月28日 · There are five known VTxx chips: VT01, VT02, VT03, VT09, and VT32, all of which are based on the Famicom core, albeit with improved hardware specifications. VTxx variants are used in almost all Famiclones released from the 2000s onward (VTxx hardware was preceded by the UM6578 chip, and would later be followed by the VTxxx hardware line).

2020年7月13日 · Things are more complex on the VTxx series: the VT02 has two, the VT03 has four, and the VT16+ have six video modes defined by the number of bits per pixel (bpp), whether Address Extension is used, and whether the Video Data Bus has eight or sixteen bits. The following table shows which video modes are available starting on which console

2018年2月25日 · A ton of research without prior famiclone knowledge and some hardmodding later, it turns out this thing is a VT03-based famiclone. The 200-in-1 multicart ROM is stored in a little Winbond W25Q64FV flash memory chip, which I've managed to dump with the help of a Raspberry Pi and FlashROM.

RM-VT01-A is specially designed for and optimized around Varadis VT01 RADFET, with current source individually adjusted for each part to minimize RADFET threshold voltage drift due to temperature. The VT02 is slightly larger than the plastic version. The critical region of the RADFET is its gate oxide.