CGA on the Amiga. Wait... what?! 

Thank you for revealing that old mystery. I stumped on the digital video output when I was making a RGB cable for my A1200 back in the days and I was not able to find any information about what it was capable of.

I'm really enjoying this "nobody asked for it" series and hope you can continue to find stuff to feature like this. As for CGA mode on the Amiga, yeah sorry but I'm going to stick to the good old native Amiga RGB modes (and RTG modes thanks to PiStorm). ;)

You have Arkanoid skills.😅

This feature was actually extremely useful in giving the Amiga a buffered high-bandwidth digital output. There was a whole class of display devices that took advantage of this feature -- DCTV (which constructed a composite signal using data sent over RGBI), and devices that combined two 4-bit pixels into one 8-bit pixel (HAM-E and Graffiti). Graffiti also introduced a semi-chunky mode using this technique. While I don't know of any implementations that used this for anything other than graphics devices, you could conceivably have sacrificed lines of your display for any arbitrary sort of digital output.

I liked this video, for a short while I had to use a RGBI on my Amiga due to an issue with my monitor ( Modified Magnavox Color Monitor 40). But was great meeting you at VCF east...

I'm not sure if you normally crimp the way you did in the shot but it would explain why you are finding crimping challenging. In the video, you put the crimp in sideways, and in a larger section that doesn't match the crimp. The open part of the "U" on the crimp should be pointed downwards and as you press it together the "arms" of the U slide along the walls and bend back on themselves. The tool has two "steps" inside which line up with the two sets of arms on the crimp - one for the wire's insulation and one for the conductor.

That worked better than I thought it would and I can totally see this as being the kind of "we shouldn't, but we will" project I would do!

Another great episode. The first computer I had access to as a kids was an IBM PC XT clone with CGA graphics. I remember being annoyed by the 4 colors limit in graphics mode, while seeing all those glorious 16 colors in text mode. My annoyance only grew when I eventually realized that it was due to the 16K of video RAM, and if it had only 16K more all 16 simultaneous colors would've been possible. I mean, what's another 16K, right? Especially considering that the system had whopping 640K of main RAM! Anyway, I still had amazing fun with that computer, and many years (decades even!) discovered that there actually used to be a Tandy 1000 standard that did pretty much what I imagined as a kid. So, to this day it remains for me a kind of mysterious "what could've been"...

I was, with my human brain, thinking about Lemmings all along, given its colours were chosen to make porting to the PC easier. Awesome ball-juggling in Arkanoid, by the way.

"It can also do...alot less" 🤣

I always wanted to try this!! Cheers for doing it. Now I don't need to bother lol.

This is probably the topic i never thought anyone would cover, i enjoyed this very very much, incredible video as always... since i always wanted a digital rgb monitor for my old c128 back in the day, and later got the amiga, now i see that i was probably for the better that i didnt get one ... anyways, keep up with good subject, perhaps i can suggest one topic i always wanted to see, that is hooking up 5 1/4 inch floppy to amiga, and use diskchange DF1: to let amiga know that disks are changed, yes, 5.25 floppies dont click :) so i guess when one makes this kind of video i will be happy to see it in action :)

I always wondered why commodore bothered with that gigantic 23 pin cable. Now I know something else was hiding in there

This would have been a perfectly serviceable option for people who only wanted to use Workbench-based apps in the 1.x era, which is probably all that the Amiga's designers were thinking about at the time. Imagine being a PC owner in 1985 wanting a more capable office machine with a GUI and faster graphics, and thinking a Mac might be a decent option if not for the tiny monochrome screen and large price tag. Then someone points out that for only $1000, you could have a machine with everything you're looking for plus you can keep your existing monitor. The people who gave it the ability to read DOS disks off an internal drive were definitely thinking about white-collar workers who wanted to take their work home with them. If only office productivity apps on the Amiga hadn't been a complete joke.

Hehe! Look at that, one learns something new every day... Thank you very much! 👍

I had a Commodore 64 back in the day, at first with a TV, then I got a monitor (an 1802 I think...or was it 1902? IDK), but at some point I ended up with a 1084S. Not sure if that was before or after I got an Amiga 500. Before, I think. So I never had to deal with connecting an Amiga to a monitor that took anything less than the 500's best, analog RGB connection and stereo sound. If I did get the Amiga before the 1084S, then I was at worst connecting composite and audio into a boom box. IDK, it's been like 33 years since I first got an Amiga and my memory isn't the greatest. A couple of friends of mine had to deal with using the A520 RF adaptor, connecting it to a TV set. That kind of sucked. What I never saw at the time (1981-1984) was an IBM with a CGA card connected through a composite into a horrible TV and creating artifact colors. At that point I hadn't really been mixing with other nerds, at least not until I got on to the BBS'es (1989), so I didn't know anyone with a PC. My first modem, a 300bps Commodore user port cartridge, led to a 1200... then an A500 with a 2400, then I got a USRobotics 14.4K HST, which was Texas Instruments DSP based and thus flashable all the way up through 33.6K and finally 56K as the standards evolved... serving into my PC years... expensive yes but worth it, definitely... used it for like a decade... then eventually on PC I got a cable modem. Now I'm using my phone to feed a hotspot to my PC. How droll. And I'm rambling. High, world. Anyway, I understand that it's mostly Sierra that took advantage of that CGA composite artifact color hack. Most developers stuck to the RGBi CGA 4-color (ugly) palettes and until VGA came out (EGA was a step up but still not great, compared to Amiga) PC graphics weren't considered "pretty."

I bought a monitor from Goodwill a year ago that was only sold through a Sears catalog. It has a RGB in socket in the back. I got excited and went down the rabbit hole to find out it was actually the digital rgb showing in this video and not the kind you mod your game consoles for. Finding the proprietary cable for it was also very hard to do. I still have no use for it and was saving it for some obscure computer that might take advantage of it.

In the late 80's I build a cable to do just this with my 1902 monitor. I hated every second of using the Amiga like that. I ended up going into debt (more so) and buying a multisync.

I absolutely love these fringe or unusual cases with retro-hardware. Sure you wouldn't use it, but it still shows the versatility of the Amiga. ChatGPT is awesome but watch out for it's hallucinations. I was messing around getting it to generate 6502 code but it kept "forgetting" the registers weren't 16bit

Wow you can play Arkanoid so well 😎kudos.. great video.

CGA = Completely Grotesque Aesthetic

interesting and entertaining beats practicality

Hopefully some demo group makes a demo specifically to push CGAmiga graphics :) Since everything else is a compromise. Sit an IBM 5153 on my Amiga 4000... oh the inhumanity of it... poor Amiga.

It is way easier if you first crimp the connector on the wire, and only then break it out of the "rail".

I have a VGA adaptor I've tested but it limits me to one monitor and precludes connecting to a capture card so I prefer RGBi to SCART then SCART to HDMI (lots of try it and see in the past)... so I've tried similar.

I actually have the RGBi cable and it works on my Magnavox monitor. Same monitor as the Commodore 1084s just Magnavox branded. Super clear for workbench and applications, not so good for art programs or games though.

I think the issues was that you had 2 grounds connected cga monitors were likely not designed for using multiple terminals at once either/or principle of operation

cool

The aga machines can show 262000 colors not 4096

Commodore 1084S, the rectangular from Philips, had TTL input. Also a cable was included, but it was for the C128 if I remember correct. EDIT: aaaand you said it later in the video 😀 Did you spot any latency with the digital input?

PC I PC II and PCIII were CGA? Using C= monitor?

I have a 23 to six pin round cable looks like that is a CGA cable I have! I bought 3 monitors 3 yrs ago lol

AFAIR, CGA has only 2 palettes of 4 colors in 320x200 graphics mode, not 3 palettes. Am I wrong?

No wonder you hate the crimp terminals when you are using the wrong crimp tool, lol.

Brown is just dark yellow. Technology Connections channel did a great, albeit long video on it. Why you never see Brown lights.

who knows if making a driver for the workbench would get something more from this video output (like a "DigitalNTSC" in ScreenMode Preferences), but probably it would be useless

I see someone modded his 1084 for SCART.

4:54 Did you cut that?

I disagree about your statement that CGA was the de facto standard until EGA superceded it. Due to the much higher cost of EGA, CGA stayed the de facto standard until VGA became cheap enough to replace it.

Even chá in Amiga is better then original, compare that with Monkey Island PC cga

dark yellow is brown.

Not new news as I bought my 1084s for my C128 and used it for my Amiga. Then I ran my first PC with CGA My 1048S is still here next to me working strong

Crimp connection = best connection. You just need the proper tools.

Playing dune 2 on a monitor is much better

what a crime, i was shocked and disgusted when i learnt about CGA, EGA and actually even VGA garbage PC users had to endure vs what the amiga had.

Hah... junky. Thanks buddy.