Hi,
A schematic of the Messiah Generation NEX NES/Famicom clone console can be downloaded from the FCC web site; search for FCC ID SFD-M1983-B. I have uploaded an archive of the PDF documents from the FCC web site: File name: Messiah_NEX_FCC_docs.zip File size: 9.22 MB
Some interesting points: the NEX uses the VR Technology VT03, so it should be possible to use the extra features like more colours and wide sprites in homebrew code.
The connection of the ONEBUS line is... "interesting". See the recent thread relating to one-bus cartridges. In the NEX, the ONEBUS line of the VT03 connects to the CHR /A13 line on the cart connector. (It's also used in the audio output circuitry, and connected to shock_Mode for the wireless controller???)
Update: In the FCC schematics PDF, the schematic page has a large border which might make printing it large enough to be legible a bit of a hassle. I have created TIFF and PDF versions of just the schematic image, with no borders. Download from:
File name: Messiah_NEX_schematic.tif File size: 41.04 KB
File name: Messiah_NEX_schematic.pdf File size: 41.97 KB
Direct link to PNG version
A schematic of the Messiah Generation NEX NES/Famicom clone console can be downloaded from the FCC web site; search for FCC ID SFD-M1983-B. I have uploaded an archive of the PDF documents from the FCC web site: File name: Messiah_NEX_FCC_docs.zip File size: 9.22 MB
Some interesting points: the NEX uses the VR Technology VT03, so it should be possible to use the extra features like more colours and wide sprites in homebrew code.
The connection of the ONEBUS line is... "interesting". See the recent thread relating to one-bus cartridges. In the NEX, the ONEBUS line of the VT03 connects to the CHR /A13 line on the cart connector. (It's also used in the audio output circuitry, and connected to shock_Mode for the wireless controller???)
Update: In the FCC schematics PDF, the schematic page has a large border which might make printing it large enough to be legible a bit of a hassle. I have created TIFF and PDF versions of just the schematic image, with no borders. Download from:
File name: Messiah_NEX_schematic.tif File size: 41.04 KB
File name: Messiah_NEX_schematic.pdf File size: 41.97 KB
Direct link to PNG version