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How to calculate ttl value of ping Videos

Logisim Ping Pong

This is my functional but not fully debugged Ping Pong game that I made from scratch. Make sure you use unequal odd numbers (prime numbers would be the ...

User Comments

Sadok Kechaou commented on 27 May 2012

Hey man, I actually have this as an assignment for next week + many fucking finals; so I was wondering if you could help me with that. I wouldn't ask you for the source file (even if I would appreciate it so much :p) since it's the result of your hard work. However little help would be appreciate it. Thanks, A suffering bachelor student.

xyybez commented on 25 Oct 2011

we are starting prodject in scool with logisim, and since you wrote that you could show us inside, so, can you? I really want to see inside and se how you did it, can you make a video of how you did it or you could send me the file? :)

james hopkins commented on 14 Dec 2015

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Quaternions commented on 29 Oct 2012

It goes slowly because otherwise it's hard to play. I think it's at around 16 Hz or something :P It moves the ball on either rising or falling edge.

Leuel48Fan commented on 11 Jul 2011

this is very good, once you finish debugging completely, upload it on mediashare or something :)

Andrea Polini commented on 26 May 2012

Congrats dude! is it possible to have the source file .circ that you used to build the program?

Quaternions commented on 12 Jun 2012

damn, I guess I missed my opportunity didn't I :| I'll make a vid of the internals anyway!

JandCandO commented on 26 Mar 2012

This is very impressive. I have no clue how you did this, but good job!

ihavethelastusername commented on 27 Oct 2012

Hey does it go so slowly because it only goes up to 4.1 KHz?

funkydiddykong commented on 25 Oct 2011

Nice going I made a pong game myself in logisim. Good job!

metalhannes commented on 14 Jun 2011

This is awesome :D

P3dotme commented on 12 May 2013

NIce

Javier García commented on 12 Sep 2013

Hack School And Libary Computers

If you subscribe then, then I will give you a free paperclip, any colour you wish...AAANNNYYY... now 1.Go to the start menu on your PC then to programs. 2.

User Comments

superdudeman01 commented on 11 Sep 2009

hey thanks man , that can be pretty helpful with other hacks like changing passwords and stuff nice video

ArrowPCProductions commented on 09 Nov 2010

This doesn't work in most schools, and this isn't hacking... hacking is A LOT more difficult than this

Sam Hellawell commented on 02 Aug 2009

Why do people say this is hacking... Executing cmd commands to get an IP... Hacking is soo much more.

Quis MC commented on 29 Oct 2008

fastest and easiest thanks...by the way it worked

TTL Tennis Game Test

DIY kits of this game are sold out. More will be available, email me or check back here for updates. Game test of my DIY tennis game made using only discrete ...

User Comments

David Winter commented on 26 Aug 2013

Very amazing remake, and clean design too. I see your clever use of the LS48 instead of custom scoring logic. However, you may know that there was a bug in the bounce ciruitry. The bug didn't affect the game much, but was clearly documented by Hugo Wolf. You only have to switch two logic lines. If you're interested I can forward the detailed PDF. Also, it would be amazing if you could remake the earliest form of Tennis game with transistors only. The schematics are on the Smithsonian site.

pong74ls commented on 20 Dec 2012

Possible maybe, but orders of magnitude more complicated than what I have done here. It has been done with FPGA (check Hack-a-Day) so that model could be broken out as a circuit made of discrete components. However the TIA chip alone consists of over 6000 transistor elements. Issues like signal skew and signalling levels start to become critical when your IC "die" is stretched out across several square centimetres of PCB instead of a microscopic square of silicon.

David Winter commented on 26 Aug 2013

I happen to own an original blue print set of the TIA schematics. You could never fit this on a single board because there are thousands of parts needed. Moreover, you would need to convert some parts to discrete which are only specific to ICs (like mutiple collector or emitter transistor, small ROMs, etc). A more interesting project is to make a 6507 CPU with TTL logic, but again, you would need too many transistors...

Murilo Queiroz commented on 19 Dec 2012

Recently I was discussing with my friends if it would be possible to recreate Atari 2600 TIA chip using only discrete logic, based on the original schematics (available at AtariAge), exactly like you did for Pong... What do you think? Does it seems viable to recreate the VCS using only off-the-shelf components (including a 650x), with no custom integrated circuits?

Murilo Queiroz commented on 20 Dec 2012

I don't have the schematics for the wirewrap prototype, but I've got the original schematics of the final TIA... Unless the prototype in the pictures is much simpler than the final version it shouldn't be a lot more complex in terms of number of discrete chips required. The process should be much similar to the one you did for Pong.

pong74ls commented on 20 Dec 2012

What I was talking about was essentially trying to emulate the TIA chip with discrete components. If you had the schematic for the wire-wrap prototype then that would be doable. The work I did to make the Pong board shown above was basically trivial; just going from a schematic to PCB design with a few small tweaks.

Murilo Queiroz commented on 20 Dec 2012

Someone sent me the pictures of the VCS prototypes (including a wirewrap version of the original STELLA chip) as evidence that it should be possible (and the final result wouldn't be very big). I'll take a look at the FPGA project you mentioned, maybe with it we can reach a good estimate.

David Winter commented on 26 Aug 2013

Forgot to say that you can also fix the timing bug which shifts the central line a little bit on the left. Nothing serious and from memory, no changes are needed. Only a faster type of chip but I don't recall which right now. Again, it's on Hugo's file.

Mikere5 commented on 02 Jan 2013

Fantastic stuff! Well done. Will you be selling a kit? Please look at my work and send an email - maybe we can work something out as I have the contacts for parts and boards? Cheers, Mike, homepin.com

Sokhann Pha commented on 18 Dec 2012

Wow! technology has came soo far.. I remember the days of blowing into a cassette tape that held the contents of the game.. trying wiggle trick or slap in trick to make any games..

SonOfOsiris3 commented on 16 Dec 2012

So I came here from reddit and I was wondering if you could post the schematic for your pcb in the comments? I would really like to try something like this