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It adapts the 10-pin IDC cable from the Altera USB-Blaster to the correct JTAG pinout found on the NESRGB board. This is a small adapter board that allows for an easier/faster method to update the firmware on Tim Worthington's NESRGB board. Anyway, these have been sitting collecting dust in the HD Retrovision archives for a while and we thought they might be of use to others.ĬLICK HERE TO DOWNLOAD Source Files and DocumentationĬLICK HERE TO ORDER Bare PCB from OSH Park We also liked how NEC used a transparent switch within the RCA audio jacks for supporting both mono and stereo audio at the same time. The interesting thing we noticed was that both the composite video and stereo audio have powered driving circuits within the TurboBooster, which is in contrast to some of the information out there on the internet for duplicating this device's functionality. When we were exploring upgraded AV options for the TurboGrafx-16, we thought we should find out what NEC did themselves with their own circuitry. These are reverse engineered schematics of a couple audio/video circuits having to do with the TurboGrafx-16: the AV output on the console itself and the AV circuitry within the TurboBooster expansion module. CLICK HERE TO DOWNLOAD TurboGrafx16 AV Output Schematic (PDF)ĬLICK HERE TO DOWNLOAD TurboGrafx16 TurboBooster AV Schematic (PDF)

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