Homemade video card
Posted: Sun May 02, 2021 7:43 pm
If your video card got a problem, you can build your own graphic adapter like this man :
https://m.youtube.com/watch?v=l7rce6IQDWs
https://m.youtube.com/watch?v=l7rce6IQDWs
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Homemade video card
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Re: Homemade video card
Posted: Fri May 07, 2021 12:24 pm
I did already something similar, but instead of logic TTL ICs I used one small AVR 8 bit microcontroller.
Re: Homemade video card
Posted: Sun May 09, 2021 12:43 am
Interesting : the two questions which come to me with such a AVR microcontroller :
1) how had you synchronized the frequency ? It seems to be difficult : the TTL behaviour is very quick (15ns for the 40 years old technologies so 30ns to a RS memory cell. 30MHz allows to be accurate). Could the recent AVR can reach these I/O frequencies ?
2) which results you got ? Graphic screen ? (Which resolution?) Text screen ? Or free pattern?
It is interesting. Plus the author of the video seems not to have reached a video handling : just a fixed low-res picture.
1) how had you synchronized the frequency ? It seems to be difficult : the TTL behaviour is very quick (15ns for the 40 years old technologies so 30ns to a RS memory cell. 30MHz allows to be accurate). Could the recent AVR can reach these I/O frequencies ?
2) which results you got ? Graphic screen ? (Which resolution?) Text screen ? Or free pattern?
It is interesting. Plus the author of the video seems not to have reached a video handling : just a fixed low-res picture.