• Visitors can check out the Forum FAQ by clicking this link. You have to register before you can post: click the REGISTER link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. View our Forum Privacy Policy.
  • Want to receive the latest contracting news and advice straight to your inbox? Sign up to the ContractorUK newsletter here. Every sign up will also be entered into a draw to WIN £100 Amazon vouchers!
Collapse

You are not logged in or you do not have permission to access this page. This could be due to one of several reasons:

  • You are not logged in. If you are already registered, fill in the form below to log in, or follow the "Sign Up" link to register a new account.
  • You may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
  • If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

Previously on "On the Shoulders of Giants..."

Collapse

  • Zippy
    replied
    Originally posted by zeitghost
    Not in 1960s RTL they're not...

    It's easy to forget how difficult some of this stuff was from the perspective of Gigs of ram & billion transistor chips...
    I find it interesting but you've probably gathered electronics is not one of my talents

    Leave a comment:


  • Zippy
    replied
    Originally posted by zeitghost
    This looks as simple as it gets...

    http://en.wikipedia.org/wiki/Resistor-transistor_logic

    4 resistors & 3 transistors for a 3 input NOR...
    Ah. NANDs are simpler to manufacture but I guess that's not the same thing.
    Cheers Zeity.

    Leave a comment:


  • Zippy
    replied
    Eee them were the days, back when men were men and engineers could actually engineer.

    Why NOR gates though - I though NANDs were less complicated?

    Leave a comment:


  • zeitghost
    started a topic On the Shoulders of Giants...

    On the Shoulders of Giants...

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

    How do you fancy knitting your programs into rom?

    "LOL memory" a.k.a. "Little Old Lady memory"...

    Amazing.

    And

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

    And, of course, some lune has to build his own version in his basement...

    http://klabs.org/history/build_agc/



    Originally posted by Zippy View Post
    Eee them were the days, back when men were men and engineers could actually engineer.

    Why NOR gates though - I though NANDs were less complicated?
    This looks as simple as it gets...

    http://en.wikipedia.org/wiki/Resistor-transistor_logic

    4 resistors & 3 transistors for a 3 input NOR...

    Originally posted by Zippy View Post
    Ah. NANDs are simpler to manufacture but I guess that's not the same thing.
    Cheers Zeity.

    Not in 1960s RTL they're not...

    It's easy to forget how difficult some of this stuff was from the perspective of Gigs of ram & billion transistor chips...

    That being said, those ancient RTL chips were a lot more radiation hard than anything since.
    Last edited by zeitghost; 28 March 2017, 08:40.

Working...
X