Difference between revisions of "PDP-8 Front Panel"

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== Pin List ==
 
== Pin List ==
  
[https://github.com/douggilliland/Retro-Computers/tree/master/PDP-8/PDP8_Book(Almy)/PDP8_VDU_FrPnl FPGA Code]
+
[https://github.com/douggilliland/Retro-Computers/tree/master/PDP-8/PDP8_Book(Almy)/PDP8_VDU_FrPnl PDP-8 FPGA Code]
  
 
<pre>
 
<pre>

Revision as of 14:17, 28 May 2021

Tindie-mediums.png

PDP-8 P458-720pxV.jpg

Features

  • 50 pin connector
    • 2x25 Pinout matches RETRO-EP4CE15 Card pins (1:1 cable)
    • Some unused pins - wired to +3.3V/GND for connecting other cards
  • 12 Value LEDs (DB0-11) - octal format
    • Display options: Program Counter (PC), Memory Address, Memory Data, Accumulator
  • 12 Load Value Slide Switches (SL0-11) - octal format
    • Enter values: PC, Memory Address, Memory Data, Accumulator
  • LNK - Link value slide switch
  • DISP - Display 12 Value LEDs select pushbutton
    • Cycles between LEDs displaying 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
  • 4 DISP LEDs - Cycle between 12 LEDs source with DISP pushbutton
    • PC - 12 LEDs display Program Counter value
    • MADR - 12 LEDs display Memory Address value
    • MD - 12 LEDs display Memory Data value
    • AC - 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

J1 to RETRO-EP4CE15 Pin Mapping

PDP-8F FrontPanel Conn Map RETRO-EP4CE15 Both.PNG

Real PDP-8/F Front Panel

PDP-8F FrontPanel 720px.jpg

Pin List

PDP-8 FPGA Code

set_global_assignment -name FAMILY "Cyclone IV E"
set_global_assignment -name DEVICE EP4CE15F23C8
set_global_assignment -name TOP_LEVEL_ENTITY pdp8
set_global_assignment -name ORIGINAL_QUARTUS_VERSION 18.1.0
set_global_assignment -name PROJECT_CREATION_TIME_DATE "13:56:19  MARCH 15, 2021"
set_global_assignment -name LAST_QUARTUS_VERSION "20.1.0 Lite Edition"
set_global_assignment -name PROJECT_OUTPUT_DIRECTORY output_files
set_global_assignment -name MIN_CORE_JUNCTION_TEMP 0
set_global_assignment -name MAX_CORE_JUNCTION_TEMP 85
set_global_assignment -name ERROR_CHECK_FREQUENCY_DIVISOR 1
set_global_assignment -name NOMINAL_CORE_SUPPLY_VOLTAGE 1.2V
set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top
set_global_assignment -name PARTITION_FITTER_PRESERVATION_LEVEL PLACEMENT_AND_ROUTING -section_id Top
set_global_assignment -name PARTITION_COLOR 16764057 -section_id Top
set_global_assignment -name POWER_PRESET_COOLING_SOLUTION "23 MM HEAT SINK WITH 200 LFPM AIRFLOW"
set_global_assignment -name POWER_BOARD_THERMAL_MODEL "NONE (CONSERVATIVE)"
set_global_assignment -name TIMING_ANALYZER_MULTICORNER_ANALYSIS ON
set_global_assignment -name SMART_RECOMPILE ON
set_global_assignment -name PROJECT_IP_REGENERATION_POLICY ALWAYS_REGENERATE_IP
set_global_assignment -name STRATIX_DEVICE_IO_STANDARD "3.3-V LVTTL"
# Clock, reset button
set_location_assignment PIN_T2 -to clk
set_location_assignment PIN_K22 -to btnCpuReset
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to btnCpuReset
# Run Switch/LED
set_location_assignment PIN_H22 -to runSwitch
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to runSwitch
set_location_assignment PIN_F21 -to runLED
# Serial
set_location_assignment PIN_B13 -to RsRx
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to RsRx
set_location_assignment PIN_B10 -to RsTx
# PS/2
set_location_assignment PIN_R1 -to io_ps2Clk
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to io_ps2Clk
set_location_assignment PIN_R2 -to io_ps2Data
set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to io_ps2Data
# VGA
set_location_assignment PIN_A17 -to o_vid_blu[1]
set_location_assignment PIN_B17 -to o_vid_blu[0]
set_location_assignment PIN_A16 -to o_vid_grn[1]
set_location_assignment PIN_B16 -to o_vid_grn[0]
set_location_assignment PIN_A15 -to o_vid_red[1]
set_location_assignment PIN_B15 -to o_vid_red[0]
set_location_assignment PIN_B18 -to o_vid_hSync
set_location_assignment PIN_A18 -to o_vid_vSync
# 12 Slide switches
set_location_assignment PIN_AB14 -to sw[0]
set_location_assignment PIN_AB16 -to sw[1]
set_location_assignment PIN_AB18 -to sw[2]
set_location_assignment PIN_AB19 -to sw[3]
set_location_assignment PIN_AA20 -to sw[4]
set_location_assignment PIN_W21 -to sw[5]
set_location_assignment PIN_V22 -to sw[6]
set_location_assignment PIN_U22 -to sw[7]
set_location_assignment PIN_R22 -to sw[8]
set_location_assignment PIN_N22 -to sw[9]
set_location_assignment PIN_M22 -to sw[10]
set_location_assignment PIN_L22 -to sw[11]
# 12 LEDs
set_location_assignment PIN_J21 -to dispLEDs[11]
set_location_assignment PIN_L21 -to dispLEDs[10]
set_location_assignment PIN_M21 -to dispLEDs[9]
set_location_assignment PIN_N21 -to dispLEDs[8]
set_location_assignment PIN_P21 -to dispLEDs[7]
set_location_assignment PIN_U21 -to dispLEDs[6]
set_location_assignment PIN_W22 -to dispLEDs[5]
set_location_assignment PIN_Y21 -to dispLEDs[4]
set_location_assignment PIN_AA19 -to dispLEDs[3]
set_location_assignment PIN_AA18 -to dispLEDs[2]
set_location_assignment PIN_AA16 -to dispLEDs[1]
set_location_assignment PIN_AA14 -to dispLEDs[0]
# Status/Operation LEDs
set_location_assignment PIN_K21 -to linkLED
set_location_assignment PIN_AA17 -to dispMDLED
set_location_assignment PIN_Y22 -to dispMALED
set_location_assignment PIN_AA15 -to dispPCLED
set_location_assignment PIN_R21 -to dispACLED
set_location_assignment PIN_H21 -to lnkSwitch
# Pushbuttons
set_location_assignment PIN_AB17 -to stepPB
set_location_assignment PIN_V21 -to depPB
set_location_assignment PIN_AB20 -to ldPCPB
set_location_assignment PIN_P22 -to ldACPB
set_location_assignment PIN_AB15 -to dispPB

PDP-8 Front Panel Assembly Sheet

PDP-8 Front Panel Assembly Sheet