Difference between revisions of "PDP-8 Front Panel"

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** Cycles between PC, Memory Address, Memory Data, Accumulator
 
** Cycles between PC, Memory Address, Memory Data, Accumulator
 
* Pushbutton Switches
 
* Pushbutton Switches
** STEP pushbutton
+
** STEP pushbutton - Increment PC
 
** LDPC pushbutton - Load PC from Value Slide Switches
 
** LDPC pushbutton - Load PC from Value Slide Switches
 
** DEP pushbutton - Store value from Value Slide Switches to memory
 
** DEP pushbutton - Store value from Value Slide Switches to memory

Revision as of 13:53, 18 April 2021

PDP-8 FRONT.png

Features

  • 12 LEDs
    • Display options: PC, Memory Address, Memory Data, Accumulator
  • 12 Load Value Slide Switches
    • Enter values: PC, Memory Address, Memory Data, Accumulator
  • Display select pushbutton
    • Cycles between PC, Memory Address, Memory Data, Accumulator
  • Pushbutton Switches
    • STEP pushbutton - Increment PC
    • LDPC pushbutton - Load PC from Value Slide Switches
    • DEP pushbutton - Store value from Value Slide Switches to memory
    • LDA pushbutton - Store value from Value Slide Switches to Accumulator
    • RES - Reset pushbutton - resets CPU
    • PB1 - spare
  • LNK - Link value slide switch
  • DISP LEDs
    • PC - 12 LEDs display Program Counter value
    • PC - 12 LEDs display Memory Address value
    • PC - 12 LEDs display Memory Data value
    • PC - 12 LEDs display Accumulator value
  • LINK LED - Displays Link value
  • FN1 spare LED
  • RUN/HALT slide switch
  • PWR - Power LED

PDP-8 FPGA Design

J1 Connector

  • 50 pin connector matches RETRO-EP4CE15 Card
    • Extra power and ground pins

PDP-8 CONN.PNG

Real PDP-8/I Front Panel

PDP-8i FrontPanel 720px.jpg