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Awesome hack: Recieving data over your tv 1980 c64


Duelus
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now what would be cool is if you backed your data up on a video tape so it used the light to store it, then just play the video plug that computer thing up to the tv and you have your backup on your computer :D

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now what would be cool is if you backed your data up on a video tape so it used the light to store it, then just play the video plug that computer thing up to the tv and you have your backup on your computer :D

Really sorry to wreck this for you guys, but if you got a video tape and recorded the data onto it using the regular methods for tape backup you would be able to do it much faster and store much more data.

+ HDTV transmissions transmit data at ~1.5MB/s, i reckon you could get about 1B/s with this, mabey a little more.

:( sorry to wreck this for you guys :(

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it might be faster but it doesnt look as cool. Just think of it, you could have this wierd looking device pluged on the front of the tv screen, someone walks in and ask's you what you are doing and replay "restoring a backup on my system" now how cool would that be.

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it might be faster but it doesnt look as cool. Just think of it, you could have this wierd looking device pluged on the front of the tv screen, someone walks in and ask's you what you are doing and replay "restoring a backup on my system" now how cool would that be.

oh absolutely.

the dot on the TV method is slower and less effective, but it certainly is many times cooler than simply putting all your crap on a tape backup.

Just like everything else, you do it not because it's better or more effective, but because you can.

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You could take it one step furthor and also have a movie or something on the tape, that why you can watch a movie while restoring the backup. :D This way if the boss catch's you watching a movie while you should be restoring the backup you can always tell him that you are actually restoring the back up

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I would imagin it would work in a similare way to a RS232 serial connection. The data is sent in a constant stream with no concept of 'confermation'. It would be very simple. You would generate a grid on the screen (The smaller the grid squars the more data). So lets say you have a 4 by 4 grid. Initily you will simpley be able to store a one or a zero (Black or white) and it would only have to be displayed for a very short time for the computer to recognise this (this means you have to set the timing and then tell the computer what the timing is).

Now, obviusly you expanentialy increse the amount of data you can store on the tape by increasing the grid size, how ever, at the same time you risk a higher chance of bit corruption (Betamax FTW on this one). There is of course another expenential way of increasing data capacity with out increasing the grid size but the risk of bit corruption remains the same. Using diffrent chades of gray to represent diffrent bit combinations, if you where just doing this with say a png image, if you just used gray scale you could store up to 16 bits in a single pixle, however, since we are using an analog storage medium it is highly unlikly it would be posible to make it pick up all 16 diffrent shades acuratly. So insted we should just use 4 bits per grid square (8 at the most) and set up the tolorances so that if the shading is a bit off it dosn't matter (like sending data down a phone line). Since Batamax (and VHS alike) can handle colour, it would be posible to represent more bit combinations with the use of colour, the difficulty is working out how to use colour to do this.

I hope you all understand better now ;)

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