Difference between revisions of "PDP-8 Front Panel"

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== J1 Connector ==
 
== J1 Connector ==
  
* 50 pin connector matches [[RETRO-EP4CE15]] Card pins
+
* Extra power and ground pins (not on [[RETRO-EP4CE15]] Card)
** Extra power and ground pins (not on [[RETRO-EP4CE15]] Card)
+
** Pins 3,4 = GND
*** Pins 3,4 = GND
+
** Pins 5-8 = VCC
*** Pins 5-8 = VCC
+
** Pin 9 = N/C
*** Pin 9 = N/C
 
  
 
[[File:PDP-8_CONN.PNG]]
 
[[File:PDP-8_CONN.PNG]]

Revision as of 15:19, 18 April 2021

PDP-8 FRONT.png

Features

  • 50 pin connector matches RETRO-EP4CE15 Card pins
  • 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 12 Value LEDs 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 pushbutton
  • 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
  • RUN LED - Running program
  • RUN/HALT slide switch
  • PWR - Power LED
  • 95x95mm form factor
  • (4) 6-32 mounting holes

PDP-8 FPGA Design

J1 Connector

  • 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