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Apple-I

Personal Computer — 1976

CPU DEBUG

REGISTERS

00
00
00
FD
FF00

FLAGS

DISASSEMBLY


    

    

      
MEMORY 

      

    

  


  

    

      
      
Apple-I Emulator — Help

      

        
What is the Apple-I?

        
The Apple-I was designed by Steve Wozniak and sold by Steve Jobs in 1976. Only about 200 were made. It was sold as a bare circuit board — users had to supply their own keyboard, display, and case.

        
Woz Monitor Commands

        
    
          
  • FF00 — Examine memory at address
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  • FF00.FF0F — Dump memory range
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  • 0300: A9 01 8D 12 D0 — Write bytes to memory
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  • 0300R — Run code at address
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Keyboard

        
    
          
  • All letters are converted to UPPERCASE
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  • Enter = Carriage Return ($0D)
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  • Backspace = Rubout
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  • Escape = Reset
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ROR Bug

        
This emulator faithfully reproduces the early NMOS 6502 ROR bug, where ROR behaved like LSR (ignoring carry input).

      

    

  


  

    

      
      
Load Program

      
Paste hex in Woz Monitor format:

      
      
    

  


  

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