EGA/VGA Graphics Deep Dive 

I think the improved frame rate with VGA is probably a result of not having to write the data to 4 different bitplanes. VGA's Mode 13h is much faster in most cases to copy screen data to/from.

Amazing stuff man!

The two monitor modes were also used for CAD and GIS Software, you could use the Monochrome for the command window and the VGA monitor for your Drawing / Map.

Yesterday I was shocked to learn that Amiga also used CGA!

didnt knew that ega could display all 64 colors

Amazing! Would be awesome if there was some sort of kit to replace the monitor/power supply on the 1512/1640 as places to get the monitor repaired are hard to find.

Great video! Thanks for sharing. Really liked the idea of EEPROM chip for logic decoding. Do you have a schematic diagram of this circuit board and a blog site? I noticed that briefly shorting out the jumper pins P8 next to the GBS 8200 CPU resulted in haulting the CPU. This stopped a great deal of sync jittering with a C128 setup I had. Keep up with the good work.

great video. how did you disable the internal card? i have an old vga card lying around and i would like to try to see if it outputs vga. i have a 1640 with a PC-ECD monitor. keep up the good work.

still had the legacy CGA chip from PC1512, but you should remember that it was a customer CGA with huge VRAM and able to run a custom 640x200x16 video mode (just like EGA could), so it might be nice to connect the chip's out... was even supported by a very few games.

1:26 - How did _Jill of the Jungle's_ CGA mode pull off the red-yellow-green-blue palette? 🤔

0:29 😂 you’re the best bro!! Keep making videos, and if you want any help with SEO or optimization I will write you a book about it

all good but imho 1920x1080 is "medium resolution mode", 3840x2160 being high resolution (for now...) and 1280x720 is new low res :)

What is that tune in the background, I know I had it in my music collection some years ago, but I lost it :(

is it possible to build an ISA hercules/MDA graphics card by hand? cool video btw

Hi, I’ve been trying to download a copy of the spreadsheet that has the covert to binary tab. I don’t see the tab. Is there another version of spreadsheet that I don’t see on google docs ?

Also EGA i had was able to output 640x480 but our EGA monitor was not able to handle it.

All the VGA RAMDAC's I tested on my breadboard supports 8 bits per red, green and blue why is yours 6 bit only ?

Can you upload more 64 color mode example screenshots, if there are any games with it?

I loved Ironman Super Offroad and I used to play it in CGA mode because I'm a masochist

Great videos!!! What was the DIP switch when working with the VGA card? (10 ON, others OFF)

Is there a "simple" way to output composite video?. or SVideo, so composite is aeasy to obtain too. Let's say I want to use a great TV or monitor but I can only use composite video . It is difficult to find CGA/EGA/MDA cards with composite video output. Is there a way, as simple as it can be, to go from RGBI to composite?

Idk if anyone will even see this message at this point. But I was considering messing around with using an ega color pallette for making a game, and I was wondering how common 64 color mode was, and if there were limitations on which of those 64 colors you could use for your 16 color pallette. Could I pick any of the 64 colors for each of my 16? Or could each of those 16 colors only be selecting from a corresponding 4 colors for example? I figure that even if certain things are possible, getting too creative with colors would break the nostalgic feel regardless.

Lots of vga cards are 8088 compatible actually, the best ones should be the tseng and the trident ones

I can't find the "funky" button..do you need edit access?

0:29 🤣🤣

cool

noice

where to buy EGA 9pin to VGA 15pin converter? no one on ali or ebay

How the hell do you know all these thingss!?

The tweaked Brown seems weird on how it was implemented but there just so many more things "that color" applied to when compared to dark yellow like trees for example. EGA was a weird standard overall though, expensive and hard to setup compared to CGA or VGA, a lot of trouble for less than impressive results in all honesty. That's what makes the 64 color mode one of the biggest missed opportunities of that entire video generation. It seems like an issue that on paper isn't insurmountable but there was obviously next to nobody prioritizing or wanting to highlight this mode in terms of hardware sales. Regardless that's 48 colors almost never seen bitd. :( The low res requirement you mentioned is likely why the Composite output wasn't included with EGA cards but really I think expansion on what CGA did with Composite was the versatility EGA lacked in retrospect.

0:30 😂

I would have liked this video - but the number of likes is 486 and nobody should change that

Enjoyed this and your other 1640 videos. With SimCity I find it always crashes after a minute or two of play time on my 1640 with PC-ECD monitor (and the EGA 350 line DIP setting). Switching to a Mono screen and corresponding Hercules settings no crashing. Found this on a couple of boards now. I wondered if you had noticed the same?

put the schematic and de bin file, a like make one

2:23 Broken glass....?

huh! amstrad 1640 has 1512 chip on board which is not used at all??!!!

0:29 , must be australian reference

you so much lack the showcase of connectors, wires and how they look :/

Great content, but the delivery is way too fast to the point of annoyance, what's the rush?!:) Unless your intention is to have a limited audience:)

Very useful info in this and the previous CGA video. Thank you. I used many of your ideas to design a PCB which plugs into the GBS and accepts CGA/EGA input (without handling the EGA 21khz issue though, just the input part). I based mine on a GAL but otherwise it's pretty much the same idea: github.com/jtsiomb/gbs-cgaega Released everything under the GPLv3. I can send you a board if you'd like to try it. If so send me your address through email (it's in the github page).