Difference between revisions of "PDP-8 Front Panel"
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* 12 Load Value Slide Switches | * 12 Load Value Slide Switches | ||
** Enter values: PC, Memory Address, Memory Data, Accumulator | ** Enter values: PC, Memory Address, Memory Data, Accumulator | ||
− | * Display select pushbutton | + | * DISP - Display select pushbutton |
** Cycles between PC, Memory Address, Memory Data, Accumulator | ** Cycles between PC, Memory Address, Memory Data, Accumulator | ||
* Pushbutton Switches | * Pushbutton Switches | ||
Line 17: | Line 17: | ||
** PB1 - spare | ** PB1 - spare | ||
* LNK - Link value slide switch | * LNK - Link value slide switch | ||
− | * DISP LEDs | + | * DISP LEDs - cycle between 12 LEDs source with DISP pushbutton |
** PC - 12 LEDs display Program Counter value | ** PC - 12 LEDs display Program Counter value | ||
** PC - 12 LEDs display Memory Address value | ** PC - 12 LEDs display Memory Address value |
Revision as of 14:16, 18 April 2021
Features
- 12 Value LEDs
- Display options: PC, Memory Address, Memory Data, Accumulator
- 12 Load Value Slide Switches
- 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
- 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
- PDP-8 PFGA Design - GitHub repo
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
- Extra power and ground pins (not on RETRO-EP4CE15 Card)