Interactive Connector Diagram
Click or tap any pin in the diagram below to inspect its signal assignment, electrical specification, and wire colour standard.
Click any pin to view its signal assignment, electrical spec, and wire colour.
Used in Retro Machine Hubs
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Connector Specifications
TI-99/4A NTSC (US)
5-Pin 180° DIN (Pin 4 = Composite, Pin 3 = Audio, Pin 2 = GND, Pin 1 = +12V)
TI-99/4A PAL (EU)
6-Pin 240° DIN (Pin 1 = +12V, Pin 2 = Y, Pin 3 = Pr/R-Y, Pin 4 = Pb/B-Y, Pin 5 = Audio, Pin 6 = GND!)
MSX Japanese RGB-8
Pin 1=Audio, Pin 2=GND, Pin 3=CSYNC, Pin 4=YS/+5V, Pin 5=CVBS, Pin 6=Red, Pin 7=Green, Pin 8=Blue
MSX European DIN-8
Pin 1=Audio, Pin 2=GND, Pin 3=CVBS/CSYNC, Pin 4=Blue, Pin 5=Green, Pin 6=Red, Pin 7=+12V, Pin 8=+5V
Full Pin Assignment & Wiring Reference
| Pin | Signal Name | Direction | Electrical Spec / Role | Wire Colour / SCART / Adapter Target |
|---|---|---|---|---|
| 1 | JP/EU MSX: AUDIO | TI (US/PAL): +12V | Out | MSX (Both): Mono Audio Out | TI-99 (NTSC 5-Pin & PAL 6-Pin): +12V Modulator Supply | MSX: SCART Pins 2 & 6 |
| 2 | JP/EU MSX: GND | TI NTSC: GND | TI PAL: Y (Luma) | GND/Out | MSX & TI NTSC: 0 V Ground | TI-99 PAL 6-Pin: Luminance + Sync (Y)! | MSX: SCART GND | TI PAL: Green YPbPr RCA |
| 3 | JP MSX: /CSYNC | TI NTSC: AUDIO | TI PAL: Pr (R-Y) | Out | JP MSX: CSYNC | EU MSX: CVBS | TI NTSC: Audio Out | TI PAL 6-Pin: Red Diff (Pr)! | MSX: SCART Pin 20 | TI PAL: Red YPbPr RCA |
| 4 | JP MSX: +5V/YS | EU MSX: BLUE | TI PAL: Pb (B-Y) | Out | JP MSX: +5V Blanking | EU MSX: Blue | TI NTSC: CVBS | TI PAL 6-Pin: Blue Diff (Pb)! | EU MSX: SCART Pin 7 | TI PAL: Blue YPbPr RCA |
| 5 | JP MSX: CVBS | EU MSX: GREEN | TI PAL: AUDIO OUT | Out | JP MSX: Composite Video | EU MSX: Analog Green | TI PAL 6-Pin: Mono Audio Out! | EU MSX: SCART Pin 11 | TI PAL: White/Red RCA |
| 6 | JP MSX: RED | EU MSX: RED | TI PAL: GND (Center) | Out/GND | Both JP & EU MSX: Analog Red! | TI-99 PAL 6-Pin: 0 V Ground (Center Pin 6)! | MSX: SCART Pin 15 (Red) | TI PAL: RCA Shield |
| 7 | JP MSX: GREEN | EU MSX: +12V Status | Out | JP MSX: Analog Green | EU MSX: +12 V AV Status (4:3 Switch) | JP MSX: SCART Pin 11 | EU MSX: SCART Pin 8 |
| 8 | JP MSX: BLUE | EU MSX: +5V Blanking | Out | JP MSX: Analog Blue | EU MSX: +5 V RGB Fast Blanking | JP MSX: SCART Pin 7 | EU MSX: SCART Pin 16 |
Direct TI-99/4A PAL Component Cable & Panasonic MSX AC-Coupling Cap Note
Systems built around the Texas Instruments TMS9918A/9929A and Yamaha V9938/V9958 VDPs use circular DIN video connectors with three famous regional variations: (1) US NTSC TI-99/4As use a 5-pin 180° DIN (C64 composite compatible), (2) European PAL TI-99/4As use a 6-pin 240° DIN outputting native Component YPbPr (Y, R-Y, B-Y) from the TMS9929A, and (3) MSX computers use an 8-pin 262° DIN in either the Japanese EIAJ RGB-8 pinout or the European Philips/Sony pinout.
- European 6-Pin PAL TI-99/4A Direct Component (YPbPr) Cable: Wire 6-pin DIN Pin 2 (Y) to Green RCA, Pin 4 (B-Y / Pb) to Blue RCA, Pin 3 (R-Y / Pr) to Red RCA, Pin 5 (Audio) to White/Red Audio RCAs, and Center Pin 6 (GND) to all RCA shields. Plug straight into a RetroTINK 5X/4K or OSSC for crystal-clear component video!
- Japanese MSX (Panasonic FS-A1ST/GT / Sony HB-F1XD) RGB SCART Note: Many Japanese MSX computers with the Sony CXA1145M encoder omit the internal 470 µF AC-coupling capacitors on Red (Pin 6), Green (Pin 7), and Blue (Pin 8). Fit three 470 µF 10V capacitors (+ leg toward MSX) inside the SCART shell.