Well, it looks a lot easier in the video than it was in real-time. I had the benefit of having quite a lot of prior experience with electronics and software. The circuit worked right away apart from the tuning potentiometer problem, but the tuning problem is a real killer if you don't notice it by testing the circuit separately. I had to spend a lot of time with things that did not fit in the video: repairing the VCR, restoring the 1404, adjusting the old TV, getting the signal generation to work (first MDA, then PAL TV), etc. It would be really interesting if it works with the master tapes that Perifractic has. I tried to contact him, but so far without success.
Yes. I think with a few modifications this could have been a practical thing and not too expensive. It's just that BBSs soon became so popular and useful that other methods of broadcasting software disappeared.
36:13 there's a typo... at first I thought it could have been a missing letter due to issues with the transmission, but I guess the typo also exists in the original code.
No, it is really 20 ms. Think about it this way: every 20 ms a new picture is drawn on the TV screen, so every 20 ms the sender has the opportunity to change the brightness of the dot. (The alternating square waves you see in the video have a frequency of 25 Hz, i.e. a full period is 40 ms.)
![The Pentax Electro Spotmatic: Reverse-engineering a marvel of 1971's Japanese electronics [Part 3].](http://i.ytimg.com/vi/HOnj1KhhlGY/mqdefault.jpg)
Brilliant work! Congratulations on completing the project with great success and thanks for sharing the journey in video form. 😃
You had a much easier time getting this to work than Retro Recipes did!
Well, it looks a lot easier in the video than it was in real-time. I had the benefit of having quite a lot of prior experience with electronics and software. The circuit worked right away apart from the tuning potentiometer problem, but the tuning problem is a real killer if you don't notice it by testing the circuit separately. I had to spend a lot of time with things that did not fit in the video: repairing the VCR, restoring the 1404, adjusting the old TV, getting the signal generation to work (first MDA, then PAL TV), etc. It would be really interesting if it works with the master tapes that Perifractic has. I tried to contact him, but so far without success.
Excellent. Retro upgrade. Top Banana !
Edwin, Long time, no see.
Willkommen back! 😁👍
There is some QM stuff in the pipeline, too. Hopefully the interval won't be that long this time.
@ Great! I’m looking forward to it. Thank you. 👍👍👍
How nice would it have been back then to embed the software into a TV show that you watch while downloading a game :D
Yes. I think with a few modifications this could have been a practical thing and not too expensive. It's just that BBSs soon became so popular and useful that other methods of broadcasting software disappeared.
Who knew William Montgomery worked for the BBC?
36:13 there's a typo... at first I thought it could have been a missing letter due to issues with the transmission, but I guess the typo also exists in the original code.
Indeed, it does. I find it quite hilarious.
It was done on the BBC micro via teletext.
9:19 LOL!
Wow
802.3ah(c64) :D
Isn't that 10ms per bit? 20ms for one entire cycle.
No, it is really 20 ms. Think about it this way: every 20 ms a new picture is drawn on the TV screen, so every 20 ms the sender has the opportunity to change the brightness of the dot. (The alternating square waves you see in the video have a frequency of 25 Hz, i.e. a full period is 40 ms.)