seastalker Posted May 16, 2019 Share Posted May 16, 2019 I thought a comparison was in order for everyone on what is known as the DIN connector. There is a 5 pin and an 8 pin I know about. I hope this thread will bring future retro gamers here to help protect their vintage gear from frying by what looks to be compatible but what actually might have a 5v line in it etc. just waiting to do some damage if not careful. Consider an addendum to this thread a comparison of DB9 connections for game controllers. So, what about CATS? Perhaps I should say "C.A.T.S" or Commodore, Atari, Texas Instruments and Sega... their hardware all share a DIN connector, but with some differences in the pin layout. Please see the attached pic (and still photo credits below). Some observations~ Commodore 64: 5pin vs 8-pin!! ** As far as cables go, a 5 pin cable will work fine on an 8 pin C64 out, because the first 5 pins are identical on BOTH. The 8 pin version adds VERY little: Top pin 7 (on right) is N/A, Top pin 8 (on left) is N/A [or 5v DC], so the ONLY interesting pin is the middle pin 6 which is CHROMA. Atari 5 pin cable NOTE: Pin 5 is CHROMA, but only in theory. In the XL series, Chroma is not connected without modding. [sAVE this info for TI99 comparison!!]. Pin one is Luma, but WITHOUT chroma connected too, I doubt it is used, and instead favors composite on pin 4 for video out. Atari 5 pin vs Commodore 5 pin cable (see above notes on extraneous 8 pin version): **Identical except for PIN 5!! Atari = Chroma while C64 = Audio IN!! Atari 5 pin vs Texas Instruments TI99/4A: in short - IDENTICAL AND COMPATIBLE CABLE!!! The ONLY differences (which will NOT create compatibility problems): Pins 2,3,4, are the same on Atari XL and TI99/4A! TI99/4A ignores pins 1 and 5 (1=luma and 5=chroma on Atari) so in a nutshell: XL and TI99/4A are identical in function with the same composite video, audio and ground; BUT*** Atari, IF s-video is modded, it takes advantage of pins 1 and 5 (chroma/luma) while the TI99/4A does not have the option. [There is a mod that gives the TI99 HDMI though!!] *****Credits go to: COMMODORE: Jan Beta for the Commodore handwriting (and HAND). [i hope he does not mind], ATARI: Bryan (of S-Video UAV mod fame) for Atari, TEXAS INSTRUMENTS: 99er.net for TI99 diagram SEGA: Youtuber "bobexr3" for his Sega Genesis/Megadrive S-Video cable diagram. I welcome ALL discussion to this topic from if I am blatantly incorrect on any detail, additional observations, etc. My goal is to create a thread for some who may have multiple systems, but do not know what cables are compatible with others, and if any cable on one system may have a danger of frying another one if blindly experimenting. It would seem if you have Atari cables, a basic 5 pin din/rca composite cable should work on a TI99/4a for instance. ***What cable combination might HURT your hardware if not careful? Quote Link to comment Share on other sites More sharing options...
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