Difference between revisions of "PDP-8 Front Panel"

From Land Boards Wiki
Jump to navigation Jump to search
Line 3: Line 3:
 
== Features ==
 
== Features ==
  
* 12 Value LEDs
+
* 12 Value LEDs - octal format
 
** Display options: PC, Memory Address, Memory Data, Accumulator
 
** Display options: PC, Memory Address, Memory Data, Accumulator
* 12 Load Value Slide Switches
+
* 12 Load Value Slide Switches - octal format
 
** Enter values: PC, Memory Address, Memory Data, Accumulator
 
** Enter values: PC, Memory Address, Memory Data, Accumulator
 
* DISP - Display select pushbutton
 
* DISP - Display select pushbutton

Revision as of 14:18, 18 April 2021

PDP-8 FRONT.png

Features

  • 12 Value LEDs - octal format
    • Display options: PC, Memory Address, Memory Data, Accumulator
  • 12 Load Value Slide Switches - octal format
    • Enter values: PC, Memory Address, Memory Data, Accumulator
  • DISP - 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
  • 4 DISP LEDs - Cycle between 12 LEDs source with DISP pushbutton
    • 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 (not on RETRO-EP4CE15 Card)
      • Pins 3,4 = GND
      • Pins 5-8 = VCC
      • Pin 9 = N/C

PDP-8 CONN.PNG

Real PDP-8/I Front Panel

PDP-8i FrontPanel 720px.jpg