ScartCable - ManuFerHi/SiDi-FPGA GitHub Wiki
Scart Cable
The SiDi can be connected to a SCART TV via a VGA to SCART cable or DIN9 to SCART cable. This must be supported by the running core and the core must generate a TV compliant RGB signal with the appropriate composite sync signal in order to allow the TV to correctly pick up the signal. The video signal must be a 15kHz/50Hz PAL signal.
Core support
The generation of a SCART TV (15khz) compliant signal is typically enabled by the following line in the MIST.INI (see the INI file documentation):
scandoubler_disable=1
The scandoubler is the component inside the Core that converts the standard TV signal the original machines generated into a VGA compliant signal. Disabling this component makes cores supporting this to output a signal similar to the one delivered by the original machine.
Supported cores
Most cores currently support RGB 15khz, but some still do not have support such as Gameboy, Vectrex ...
The cable
Matching cables can be bought e.g. from ManuFerHi
VGA to SCART cable > https://manuferhi.com/p/cable-rgb-scart-zx-uno-vga-2m-mist-and-mister
DIN9 to SCART cable > https://manuferhi.com/p/din9-to-scart-cable
SCART TVs expect at least five signals: The three analogue colour signals, a composite sync signal and a signal telling the TV to switch into RGB mode. The colour signals are directly taken from the VGA connector and have a similar function as in VGA mode. The composite sync signal (a combination of the H- and VSYNC signals) required by SCART TVs has to be delivered via the VGA connectors HSYNC pin and the RGB switch signal (permanent high) is being taken from the VGA connectors VSYNC signal.
Audio
The MIST provides analogue audio signals on the 3.5mm audio plug. These signals can optionally also be connected to the SCART connector on a TV.
Ground connections
There are various ground connections on the VGA as well as the SCART connector. Some of them are usually being used to shield the colour signals as well as he audio signals. At least the connection between VGA pin 10 and SCART pin 18 is required. But it is recommended to connect the shield connections as well to protect the analogue signals from noise.