How hard would it be to make a CGA card?

Discussion about old graphics cards, monitors and video related things.

Re: How hard would it be to make a CGA card?

Postby anetanel » 2018-8-02 @ 15:55

Well, while this does produce a usable signal, for some reason it is not a stable and clear as when I use the dedicated NOT chip. It seems to easily pick noise when I even slightly tuch or move my hand near the wires, while with the dedicated chip nothing changes when I touch them.
anetanel
Member
 
Posts: 103
Joined: 2017-1-01 @ 23:10

Re: How hard would it be to make a CGA card?

Postby anetanel » 2018-8-02 @ 21:39

It is not the prettiest, and it took me several hours of soldering, but it works! And on the first go, again.
I'm going to buy a lottery ticket :)
Attachments
2018-08-03 00.22.21.jpg
anetanel
Member
 
Posts: 103
Joined: 2017-1-01 @ 23:10

Re: How hard would it be to make a CGA card?

Postby Jo22 » 2018-8-02 @ 22:01

Congratulations on a job well done! :)

It doesn't look ugly at all to me. Good work!
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//
User avatar
Jo22
l33t
 
Posts: 3981
Joined: 2009-12-13 @ 07:06
Location: Europe

Re: How hard would it be to make a CGA card?

Postby anetanel » 2018-8-02 @ 22:31

Jo22 wrote:It doesn't look ugly at all to me. Good work!


Well... I strategically showed the nice side :P
But thanks! :)
anetanel
Member
 
Posts: 103
Joined: 2017-1-01 @ 23:10

Re: How hard would it be to make a CGA card?

Postby Jo22 » 2018-8-03 @ 00:52

Haha, I see. ^^ Seriously, though, I think you still did a good job on it.
This reminds me of an an old saying/truism: Nothing is more definitive than the temporary.
(In German: Nichts hält länger als ein Provisorium.)
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//
User avatar
Jo22
l33t
 
Posts: 3981
Joined: 2009-12-13 @ 07:06
Location: Europe

Re: How hard would it be to make a CGA card?

Postby VileRancour » 2018-8-03 @ 09:37

And I was starting to think I'm the only one in this country messing around with CGA stuff and this period of PC hardware. :D Congrats and well done!
web  /   blog   /   tube
User avatar
VileRancour
Oldbie
 
Posts: 1731
Joined: 2003-5-14 @ 22:11
Location: 1-01-80 0:00a

Re: How hard would it be to make a CGA card?

Postby root42 » 2018-8-03 @ 09:48

Great result! Take good care of that lovely hardware!
Soldering, retro game reviews and more on YouTube and Bonus videos
80386DX@25 MHz, 8 MiB RAM, Tseng ET4000 1 MiB, Jazz16, PC MIDI Card + SC55MkII + MT32, XT CF Lite, OSSC 1.6
User avatar
root42
Oldbie
 
Posts: 1279
Joined: 2018-1-27 @ 13:23

Re: How hard would it be to make a CGA card?

Postby prpplague » 2019-9-08 @ 23:58

VileRancour wrote:And I was starting to think I'm the only one in this country messing around with CGA stuff and this period of PC hardware. :D Congrats and well done!

nope you aren't the only one messing around with old video interfaces! i started a project this past spring to dig into how MDA and CGA cards work. i've had some good success in creating my own video card. right now i am driving an LCD panel, but have plans to add in VGA and DVI-D outputs...
https://hackaday.io/project/167089-isa-8-bit-video-experiments

a list of the boards in this project can be found here:
https://hackaday.io/list/167511-experiments-in-8-bit-ibm-pc-architecture
User avatar
prpplague
Newbie
 
Posts: 1
Joined: 2019-9-08 @ 23:48

Previous

Return to Video

Who is online

Users browsing this forum: No registered users and 4 guests