Это видео недоступно.
Сожалеем об этом.
Grundy Newbrain Demo
HTML-код
- Опубликовано: 3 июл 2024
- This is a demo of a Grundy Newbrain Home computer
Based on Zilog z80 @4Mhz, i am using an arduino uno connected to a SD Card and communicating with the Newbrain using the RS232 Serial port.
By using poke 19,9 i change the default storage device to RS232 so i could use load and save as usual.
You can see the real speed of the Newbrain as it paints graphics on the screen.
More info on: newbrainemu.eu/
You were lucky to get one that worked - they seemed to have a rather high failure rate and were also a bit of a pig to work on because there are 3 PCBs connected together with fragile paper flex cables inside that rather small case. Also, if you have the original Grundy PSU then it's advisable to take it apart and check to see if it has those plastic encapsulated Rifa caps in it, since they have a habit of cracking, letting moisture in then blowing up while generating clouds of foul smelling smoke.
@@TrimeshSZ I have it since 1983. I only changed the electrolytic caps a few years ago. As for the PSU i have not touch it yet and it works ok.
@@CDESP072 I think it's worth taking a look though - that cap is located underneath the power transformer and I had no idea it was even there until it blew up. If you see cracking in the plastic housing then consider replacing it. IRRC, the one in the Newbrain is one of those 3 caps in one package thing - it has an X cap across the line and neutral and a pair of Y caps going between live/neutral and earth. In my case, it was the X cap that blew up.
I like the music! What is it?