VOGONS

Common searches


First post, by Mau1wurf1977

User metadata
Rank l33t++
Rank
l33t++

This is related to a education project I'm working on. Basically I'm looking for cool, but also cheap ways, for people new to computers, to "see" the 0's and 1's when it comes to computers.

One method involves recording speech, burning a CD and then inspecting it under a microscope. But now I'm looking for other methods.

Was thinking about using an oscilloscope, but they seem pricey and the cheap ones on eBay will likely be too slow. But I could just use an really old computer, right? Like a home computer...

What other options are there? Can you "visualize" for example the magnetic orientations on a floppy disc?

Reply 1 of 17, by rfnagel

User metadata
Rank Oldbie
Rank
Oldbie

Sorry, not related to your actual subject at hand, but they *ARE* 1's and 0's 🤣!

http://www.cmoo.com/snor/weeds/Airline_Simulator_2_BE.htm
http://www.cmoo.com/snor/weeds/GeneRally_BE.htm
http://www.cmoo.com/snor/weeds/Microsoft_Windows_BE.htm
http://www.cmoo.com/snor/weeds/NASCAR_Racing_3_BE.htm

<grin> 😀

Rich ¥Weeds¥ Nagel
http://www.richnagel.net

Reply 2 of 17, by Zup

User metadata
Rank Oldbie
Rank
Oldbie

Are you trying to see the Matrix?

You may try something easier... remember that older computers worked with tapes, so you may get a mp3 of a ZX Spectrum tape and use audacity to see the "shape" of the 0's and 1's in the tape (I think they're recorded using different frequencies).

Because speccies use audio tapes, also you will be able to "hear" the computer language. You may save a block of 0's, a block of 1's and a computer game (0's an 1's mixed altogether) to see how they sound. Loading screens are easy to identify...

I have traveled across the universe and through the years to find Her.
Sometimes going all the way is just a start...

I'm selling some stuff!

Reply 3 of 17, by Mau1wurf1977

User metadata
Rank l33t++
Rank
l33t++

That's an interesting idea, thanks!

Question: Is there a way to "visualise" the magnetic orientations on a floppy drive or tape drive? A photo would be fine!

What about flash memory? I have been looking for a picture where you can see all the cells lined up next to each other. I know they are very small, but maybe something under a microscope?

C2n_waveform.png

To%20record%20physical%20data,%20the%20zero-crossing%20from%20positive%20to%20negative%20voltage%20of%20the%20analog%20signal%20is%20measured.%20The%20resulting%20time%20between%20these%20positive%20to%20negative%20crossings%20is%20then%20compared%20to%20a%20threshold%20to%20determine%20whether%20the%20time%20since%20the%20last%20crossing%20is%20short%20%280%29%20or%20long%20%281%29.%5B6%5D%20Note%20the%20lower%20amplitude%20for%20the%20shorter%20periods.%0A%0AA%20circuit%20in%20the%20tape%20unit%20transforms%20the%20analog%20signal%20into%20a%20logical%20one%20or%20zero%20which%20is%20then%20transmitted%20to%20the%20computer%20via%20the%20tape%20connector.%20Inside%20the%20computer%20the%20first%20Complex%20Interface%20Adapter%20%286526%29%20in%20the%20C64%20senses%20when%20the%20signal%20goes%20from%20one%20to%20zero.%20This%20event%20is%20called%20trigger%20and%20causes%20an%20interrupt%20request.%20This%20event%20can%20be%20handled%20by%20a%20handler%20code,%20or%20simply%20discovered%20by%20testing%20bit%204%20of%20location%20$DC0D.%20The%20points%20that%20trigger%20this%20event%20are%20indicated%20by%20the%20black%20circles%20in%20the%20figure.%5B6%5D%0A%0AInside%20the%20tape%20device%20the%20read%20head%20signal%20is%20fed%20into%20an%20operational%20amplifier%20%281%29%20whose%20output%20signal%20is%20DC-filtered.%20Op-amp%20%282%29%20amplifies%20and%20feeds%20an%20RC-filter.%20Op-amp%20%283%29%20amplifies%20the%20signal%20again%20followed%20by%20another%20DC-filter.%20Op-amp%20%284%29%20amplifies%20the%20signal%20into%20clipping%20the%20sine%20formed%20signal.%20The%20positive%20and%20negative%20rails%20for%20all%20op-amps%20are%20wired%20to%20+5V%20DC%20and%20GND.%20The%20clipped%20signal%20therefore%20fits%20into%20the%20TTL%20electrical%20level%20window%20of%20the%20schmitt%20trigger%20step%20that%20in%20turn%20feeds%20the%20digital%20cassette%20port.

Reply 4 of 17, by wd

User metadata
Rank DOSBox Author
Rank
DOSBox Author

You won't see the 0s and 1s on a floppy since they're encoded, see
http://en.wikipedia.org/wiki/Modified_Frequency_Modulation
but that may be still enough to see some sort of binary data.

Reply 5 of 17, by ripsaw8080

User metadata
Rank DOSBox Author
Rank
DOSBox Author

The search term "magnetic force microscopy" turns up some interesting stuff that may be relevant.
A different kind of MFM than what wd referred to. 😉

http://en.wikipedia.org/wiki/Magnetic_force_microscope

Reply 9 of 17, by leileilol

User metadata
Rank l33t++
Rank
l33t++

As for floppies, I know 'resqflpy' for DOS can show the contents of each chunk it reads along a disk to the screen so you could probably run it, then point out "THIS IS WHAT IS HAPENING! YOU CANT DO THIS ON NINTENDO" or something

Reply 11 of 17, by dvwjr

User metadata
Rank Member
Rank
Member

If you are going after non-technical types, here are a few screen-caps:

😁

dvwjr

Attachments

  • Filename
    DVE - 00000.png
    File size
    518.65 KiB
    Downloads
    137 downloads
    File comment
    Ones and Zeros - Laptop
    File license
    Fair use/fair dealing exception
  • Filename
    DVE - 00001.png
    File size
    533.36 KiB
    Downloads
    139 downloads
    File comment
    Ones and Zeros - Desktop
    File license
    Fair use/fair dealing exception
  • Filename
    DVE - 00002.png
    File size
    413.01 KiB
    Downloads
    141 downloads
    File comment
    Ones and Zeros - MPEG
    File license
    Fair use/fair dealing exception

Reply 13 of 17, by Old Thrashbarg

User metadata
Rank Oldbie
Rank
Oldbie

Back on the subject of magnetic media, while it would be difficult to visualize the data on a floppy disk, cassette tape may be a worthwhile avenue to look at.

Here's something you may find useful. It's a page belonging to Mike Brutman (mbbrutman on the VCF), where he's showing and analyzing the waveform from a PC Jr. data cassette as it appears through Audacity. Interesting stuff.

Reply 15 of 17, by batracio

User metadata
Rank Member
Rank
Member

You can make a simple LED circuit and connect it to parallel port:

lpt.jpg

The 0's and 1's analogy is very easy to understand: if you write a 1 to the I/O address of a parallel pin, you will switch its LED on; if you write a 0 to the same address, you will switch the LED off.

leds.jpg

This is a very common exercise in electronics, computing or programming courses. I used to make this kind of stuff in MS-DOS real mode with either C or assembly, but now you may use one of the many GUI apps available:

http://x24.x24garcia.com/prog_LEDtest.html (seems to be a VB6 program)
x24LEDtest.jpg

http://www.codeproject.com/KB/system/PaPiC.aspx (C++ wrapper for I/O dll)
papic1.gif

http://www.codeproject.com/KB/cs/csppleds.aspx (same thing but using C# instead)
article1_001.jpg

http://www.brothersoft.com/parallel-port-libr … net-130837.html (a VB or C# library for .Net)
parallel_port_library_for_.net-130837-1.jpeg

http://jaspreetscodezone.blogspot.com (a blog with lots of useful info about parallel port programming)
PPC%2BHome%2BPage.JPG

... and many, many more. There are tons of info out there, just google it.

Reply 16 of 17, by mbbrutman

User metadata
Rank Member
Rank
Member

OldThrashbarg pointed it out, but I think it deserves a picture because it was so cool ...

High_Zoom.jpg

And here is the original page that it came from.

I had a lot of fun poking around with a pretty normal sound editor, zooming in and finding my ones and zeros.

Mike