old 6 bit connections

BBC micro / Master 128 / Electron (3 bit RGB TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	6 way DIN	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Pin 5
Pin 2 green2	Pin 4 green2
Pin 3 red2	Pin 5 red2
Pin 4 blue2	Pin 6 blue2
Pin 5 RED3	Pin 7 RED3	Pin 1
Pin 6 HSYNC	Pin 8 HSYNC	Pin 4
Pin 7 GREEN3	Pin 9 GREEN3	Pin 2
Pin 8 VSYNC	Pin 10 VSYNC
Pin 9 BLUE3	Pin 11 BLUE3	Pin 3
Pin 10 +5V	Pin 12 +5V	Pin 6	Leave unconnected if powering Pi externally

Oric 1 / Atmos (3 bit RGB TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	5 way 180° DIN	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Pin 5
Pin 2 green2	Pin 4 green2
Pin 3 red2	Pin 5 red2
Pin 4 blue2	Pin 6 blue2
Pin 5 RED3	Pin 7 RED3	Pin 1
Pin 6 HSYNC	Pin 8 HSYNC	Pin 4
Pin 7 GREEN3	Pin 9 GREEN3	Pin 2
Pin 8 VSYNC	Pin 10 VSYNC
Pin 9 BLUE3	Pin 11 BLUE3	Pin 3
Pin 10 +5V	Pin 12 +5V

Camputers Lynx (3 bit RGB TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	5 way 240° DIN	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Shield	Must be connected to both shield halves
Pin 2 green2	Pin 4 green2
Pin 3 red2	Pin 5 red2
Pin 4 blue2	Pin 6 blue2
Pin 5 RED3	Pin 7 RED3	Pin 5
Pin 6 HSYNC	Pin 8 HSYNC	Pin 1
Pin 7 GREEN3	Pin 9 GREEN3	Pin 4
Pin 8 VSYNC	Pin 10 VSYNC
Pin 9 BLUE3	Pin 11 BLUE3	Pin 2
Pin 10 +5V	Pin 12 +5V

Note the 5 way 240° DIN has different pin numbering to the 5 way 180° DIN

Sinclair QL (3 bit RGB TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	8 way DIN	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Pin 2
Pin 2 green2	Pin 4 green2
Pin 3 red2	Pin 5 red2
Pin 4 blue2	Pin 6 blue2
Pin 5 RED3	Pin 7 RED3	Pin 7
Pin 6 HSYNC	Pin 8 HSYNC	Pin 4
Pin 7 GREEN3	Pin 9 GREEN3	Pin 6
Pin 8 VSYNC	Pin 10 VSYNC
Pin 9 BLUE3	Pin 11 BLUE3	Pin 8
Pin 10 +5V	Pin 12 +5V

Spectrum 128 or +2 (4 bit RGBI TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	8 way DIN	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Pin 2
Pin 2 green2	Pin 4 green2	Pin 3	Intensity
Pin 3 red2	Pin 5 red2
Pin 4 blue2	Pin 6 blue2
Pin 5 RED3	Pin 7 RED3	Pin 7
Pin 6 HSYNC	Pin 8 HSYNC	Pin 4
Pin 7 GREEN3	Pin 9 GREEN3	Pin 6
Pin 8 VSYNC	Pin 10 VSYNC
Pin 9 BLUE3	Pin 11 BLUE3	Pin 8
Pin 10 +5V	Pin 12 +5V

IBM PC MDA, CGA, EGA (2, 4 or 6 bit TTL) / Olivetti Prodest PC1 (4 bit RGBI TTL) / Commodore 128 80 column (4 bit RGBI TTL)

RGBtoHDMI 10 way IDC	RGBtoHDMI 12 way IDC	9 way D-Type	Notes
	Pin 1 red1
	Pin 2 blue1
Pin 1 GND	Pin 3 GND	Pin 1
Pin 2 green2	Pin 4 green2	Pin 6	Intensity in CGA / MDA
Pin 3 red2	Pin 5 red2	Pin 2
Pin 4 blue2	Pin 6 blue2	Pin 7
Pin 5 RED3	Pin 7 RED3	Pin 3
Pin 6 HSYNC	Pin 8 HSYNC	Pin 8
Pin 7 GREEN3	Pin 9 GREEN3	Pin 4	Video in MDA
Pin 8 VSYNC	Pin 10 VSYNC	Pin 9
Pin 9 BLUE3	Pin 11 BLUE3	Pin 5
Pin 10 +5V	Pin 12 +5V	N/C