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   Message 9,042 of 9,209   
   colin randall to Daniel   
   Re: ASCII: 6502 internal organization   
   21 Mar 21 02:18:59   
   
   From: colin.randall2@googlemail.com   
      
   On Saturday, March 20, 2021 at 8:38:31 AM UTC, Daniel wrote:   
   > Eli the Bearded <*@eli.users.panix.com> writes:   
   > > In alt.ascii-art, Daniel  wrote:   
      
   > >> I am creating a set of facts about the 6502 processor and created a   
   > >> diagram of the internal organization of the chip taken from a   
   > >> programming book. How do you like it? Recommend any changes?   
      
   > >> Here's the art: gopher://gcpp.world/1/phlog/6502Org   
      
   hi ... i used   https://gopher.commons.host/  to view the above url   
      
   > I'll see if I have room to widen it. Gopher's really designed for 67   
   > columns and I'm really close. I may able to tweak the drawing.   
   > >   
   > > Just so that they don't look so mashed together. In the same "not mashed   
   > > together" way, maybe move the whole KEY section below the diagram?   
   > I'll see if I can redesign the key to fit on one page vs two.   
      
   > > Elijah   
   > > ------   
   > > any reason for only posting a gopher URL instead of the art?   
      
   also had a few suggestions ... unfortunatly took the liberty of swapping   
   about some bits already ... appologies in advance ... here's what i thought   
   (also incorporates Eli's suggestion of *Letting Daylight In*)   
   ... hope it helps   
   123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789   
      
   <=- - - - - - - - - -  6 7  c o l u m n s  w i d e  - - - - - - -=>   
      
      
              INTERNAL ORGANIZATION OF THE 6502   
      
                   ._______________._______._________.   
                   |               |       |         |       DATA BUS   
      -----------------------------------------.------------> (DB0-7)   
      ^     ^    ^ |    ^  ^   ^   |   ^   |   |     |    ^   
      |     |    | |    |  |   |   |   |   |   |     |    |   
      |     |    | |    |  |   |   |   |   |  _v_   _v_  _v_   
     _v_   _v_   v_|   _v_ v   v___|   v___|  \  \_/  / |   |   
    | X | | Y | | A | | S |I| | PCL | | PCH |  \ ALU /  | P |   
    |___| |___| |___| |___|_| |_____| |_____|   \___/   |___|   
                  ^     |  |   |       |          |   
    KEY:          |     |  |   |       |          |   
                  `-----|--|---|-------|----------:    .___.   
   X,Y: INDEX           |  |   |       |          |--->|   |   
        REGISTERS       |  |   `-------|----------|--->|MUX|->ADDR LO   
                        `--|-----------|----------|--->|___|  (A0-7)   
   A: ACCUMULATOR          |           |          |   
                           |           |          |    .___.   
   S: STACK POINTER        |           |          `--->|   |   
                           |           `-------------->|MUX|->ADDR HI   
   PC: PROGRAM COUNTER     `-------------------------->|___|  (A8-15)   
      
   ALU: ARITHMETIC-LOGIC UNIT   
      
   P: PROCESSOR STATUS   
      
   MUX: MULTIPLEX   
      
   AH/L: ADDRESS HIGH/LOW   
      
      
   --   
     .   
   ._!__  __ __ .   
     / _\/_ |_ \!_.   
    / /    7 / /|   
    \ \_ _/ /  \ .   
     \_//__/|_\_\!_.   
                 |   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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