PDP-11 ON RETRO-EP4CE15
Work in Progress
Contents
Build
FPGA
- Runs on RETRO-EP4CE15 FPGA card
- Requires QM Tech Cyclone V FPGA Board
- Or, EP4CE55 Cyclone IV Card
PDP2011 FPGA Builds
- Our PDP-11/45 and /70 builds
- PDP2011 by Sytse van Slooten - the original project
- David Richards PDP-11 Build on A-ESTF V2 EP4CE22 Board
Software
Disk Images
- RL images are in chunks of 256 bytes, and require inserting 256 bytes padding after each of those chunks
- sdfmt converts files to 256 out of 512 bytes - Runs under Linux
- System Disk Images
- Disk Images
- OS Kits
Documentation
- PDP-11 Processor Handbook 1981 - on BitSavers
- PDP-11/45 System User's Manual
- PDP-11/70 Processor Handbook
Configuration Switches/Jumpers/LEDs
J3 - Configuration Jumpers (5CEFA2F23 FPGA Card pin numbers)
| DRIVE | VALUE | SW3 | SW2 | SW1 |
|---|---|---|---|---|
| rl | SELECT | OUT | OUT | IN |
| rk | SELECT | OUT | IN | OUT |
| rp | SELECT | IN | OUT | OUT |
| J3 | 5, 6 | 3,4 | 1,2 | |
| FPGA PIN | PIN_K22 | PIN_K17 | PIN_L17 |
Switches
| Function | J10 Pin | FPGA Pin |
|---|---|---|
| resetbtn | SW9 | PIN_J16 |
Connectors
P1 - VGA (5CEFA2F23 Card)
- videoR0 = U8-49 = PIN_E12
- videoR1 = U8-50 = PIN_D12
- videoG0 = U8-51 = PIN_D13
- videoG1 = U8-52 = PIN_C13
- videoB0 = U8-53 = PIN_B13
- videoB1 = U8-54 = PIN_A13
- hSync = U8-55 = PIN_A15
- vSync = U8-56 = PIN_A14
P2 - PS/2 Keyboard
- PS2DAT = U7-8 = PIN_BANK_2A_AA1
- PS2CLK = U7-8 = PIN_NANK_2A_AA2
P3 - Serial Ports - I/O connector
- fpgaRx1 (in) = PIN_C11
- Needs weak pullup
- set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to rxd1
- Needs weak pullup
- fpgaTx1 (out) = PIN_G10
- fpgaRts1 = U7-44 = PIN_F10
- fpgaCts1 = U7-46 = PIN_B11
IO conn
- Second serial port on I/O connector
- rx2 (in) = PIN_M18
- tx2 (out) = PIN_L19
- rts2 (out) = PIN_N19
- cts2 (in) = PIN_M21
P4 - SD Card (5CEFA2F23 FPGA pin numbers)
- This build only works with SD Cards, not SD/HC or other newer cards.
- These cards are 1 GB or 2 GB in size.
- SDCS = U7-57 = PIN_BANK_7A_B15
- MOSI = U7-58 = PIN_BANK_7A_C15
- SCK = U7-59 = PIN_BANK_7A_C16
- MISO = U7-60 = PIN_BANK_7A_B16
- SD_DETECT - PIN_B12
J1 - I/O Connector (5CEFA2F23 FPGA Card pin numbers)
- J1-50 = GND
- J1-49 = GND
- J1-48 = PIN_M22 = resetbtn
- J1-47 = PIN_L22 = n/a
- J1-46 = PIN_L18 = tx1
- J1-45 = PIN_L19 = rx1
- J1-44 = PIN_M18 = rts1
- J1-43 = PIN_N19 = cts1
- J1-42 = PIN_M21 = n/a
- J1-41 = PIN_M20 = n/a
- J1-40 = PIN_N20 = xu_sclk
- J1-39 = PIN_N21 = xu_mosi
- J1-38 = PIN_P16 = xu_miso
- J1-37 = PIN_P17 = xu_debug_tx
- J1-36 = PIN_T20 = xu_cs
- J1-34 = PIN_P22 = greenled[1]
- J1-33 = PIN_R21 = greenled[0]
- J1-32 = PIN_R22 = greenled[3]
- J1-31 = PIN_T22 = greenled[2]
- J1-29 = PIN_U20 = greenled[4]
- J1-1 = VCC
- J1-2 = VCC
J4 - USB-B B (5CEFA2F23 FPGA Card pin numbers) Serial Port
- On-board FT230X FTDI USB to Serial
Resources
- PDP2011 by Sytse van Slooten
- Active as of 2021-02
- David J Richards PDP-11 Build - copied and adapted from pdp2011 by Sytse van Slooten
- PDP-11 on BitSavers
- Scott L Baker PDP11-SOC
- PDP-11/20 CPU
- UART + Timer + I/O Ports coded in VHDL
- 8KB RAM
- Implemented on the Lattice iCE40-hx8k dev board
- w11: PDP 11/70 CPU and SoC
- PDP-11/70 CPU with memory management unit, but without floating point unit,
- Quick start Guide
- OS Kits (Disk Images)
- Guide to run operating system images on w11a systems
- Guide to install and build w11a systems, test benches and support software
Programming the FPGA EEPROM (5CEFA2F23 FPGA)
- File
- Convert Programming File
- Configuration Device = MT25QL128
- Mode = Active Serial
- Programming File Type: *.jic
- Advanced = Check both Disables...
- Select Flash Loader
- Add Device = Cyclone V and 5CEFA2
- Select SOF Data
- Select Add File and select the .sof file
- Generate
- In Tools, Programmer
- Mode: JTAG
- Add file and select the .jic file
- Select Program/Configure
- Takes a while to program
- Press button near VGA
Pin List
# Analysis & Synthesis Assignments # ================================ set_global_assignment -name FAMILY "Cyclone V" set_global_assignment -name TOP_LEVEL_ENTITY top set_global_assignment -name EDA_DESIGN_ENTRY_SYNTHESIS_TOOL "Design Compiler" # Fitter Assignments # ================== set_global_assignment -name DEVICE 5CEFA2F23I7 set_global_assignment -name STRATIX_DEVICE_IO_STANDARD "3.3-V LVTTL" set_global_assignment -name CRC_ERROR_OPEN_DRAIN OFF set_global_assignment -name CYCLONEII_RESERVE_NCEO_AFTER_CONFIGURATION "USE AS REGULAR IO" set_global_assignment -name FORCE_CONFIGURATION_VCCIO ON # Pin & Location Assignments # ========================== # Clock and external reset button set_location_assignment PIN_M9 -to clkin set_location_assignment PIN_M22 -to resetbtn set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to resetbtn # Control switches set_location_assignment PIN_L22 -to sw_cont set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to sw_cont set_location_assignment PIN_L18 -to sw_halt set_instance_assignment -name WEAK_PULL_UP_RESISTOR ON -to sw_halt set_location_assignment PIN_M20 -to led_run # Jumpers on front edge set_location_assignment PIN_L17 -to switch[0] set_location_assignment PIN_K17 -to switch[1] set_location_assignment PIN_K22 -to switch[2] set_location_assignment PIN_K21 -to switch[3] # SDRAM set_location_assignment PIN_Y9 -to dram_addr[12] set_location_assignment PIN_T9 -to dram_addr[11] set_location_assignment PIN_R6 -to dram_addr[10] set_location_assignment PIN_W8 -to dram_addr[9] set_location_assignment PIN_T8 -to dram_addr[8] set_location_assignment PIN_U8 -to dram_addr[7] set_location_assignment PIN_V6 -to dram_addr[6] set_location_assignment PIN_U7 -to dram_addr[5] set_location_assignment PIN_U6 -to dram_addr[4] set_location_assignment PIN_N6 -to dram_addr[3] set_location_assignment PIN_N8 -to dram_addr[2] set_location_assignment PIN_P7 -to dram_addr[1] set_location_assignment PIN_P8 -to dram_addr[0] set_location_assignment PIN_P9 -to dram_ba_1 set_location_assignment PIN_T7 -to dram_ba_0 set_location_assignment PIN_AA7 -to dram_cas_n set_location_assignment PIN_V9 -to dram_cke set_location_assignment PIN_AB11 -to dram_clk set_location_assignment PIN_AB5 -to dram_cs_n set_location_assignment PIN_P12 -to dram_dq[15] set_location_assignment PIN_R12 -to dram_dq[14] set_location_assignment PIN_U12 -to dram_dq[13] set_location_assignment PIN_R11 -to dram_dq[12] set_location_assignment PIN_R10 -to dram_dq[11] set_location_assignment PIN_U11 -to dram_dq[10] set_location_assignment PIN_T10 -to dram_dq[9] set_location_assignment PIN_U10 -to dram_dq[8] set_location_assignment PIN_AA8 -to dram_dq[7] set_location_assignment PIN_AB8 -to dram_dq[6] set_location_assignment PIN_AA9 -to dram_dq[5] set_location_assignment PIN_Y10 -to dram_dq[4] set_location_assignment PIN_AB10 -to dram_dq[3] set_location_assignment PIN_AA10 -to dram_dq[2] set_location_assignment PIN_Y11 -to dram_dq[1] set_location_assignment PIN_AA12 -to dram_dq[0] set_location_assignment PIN_V10 -to dram_udqm set_location_assignment PIN_AB7 -to dram_ldqm set_location_assignment PIN_AB6 -to dram_ras_n set_location_assignment PIN_W9 -to dram_we_n # Serial port (USB-to-Serial) set_location_assignment PIN_C11 -to rx1 set_location_assignment PIN_G10 -to tx1 set_location_assignment PIN_F10 -to rts1 set_location_assignment PIN_B11 -to cts1 # Second serial port set_location_assignment PIN_L19 -to tx2 set_location_assignment PIN_M18 -to rx2 set_location_assignment PIN_M21 -to cts2 set_location_assignment PIN_N19 -to rts2 # SD Card set_location_assignment PIN_C16 -to sdcard_sclk set_location_assignment PIN_B15 -to sdcard_cs set_location_assignment PIN_B16 -to sdcard_miso set_location_assignment PIN_C15 -to sdcard_mosi # Seven segment display (on J1) set_location_assignment PIN_R21 -to max7219_clock set_location_assignment PIN_P22 -to max7219_data set_location_assignment PIN_T19 -to max7219_load # Ethernet set_location_assignment PIN_T20 -to xu_cs set_location_assignment PIN_P17 -to xu_debug_tx set_location_assignment PIN_P16 -to xu_miso set_location_assignment PIN_N21 -to xu_mosi set_location_assignment PIN_N20 -to xu_sclk # PS/2 Keyboard set_location_assignment PIN_AA2 -to ps2k_c set_location_assignment PIN_AA1 -to ps2k_d # Video set_location_assignment PIN_A15 -to vgah set_location_assignment PIN_A14 -to vgav set_location_assignment PIN_A13 -to o_vgab[1] set_location_assignment PIN_B13 -to o_vgab[0] set_location_assignment PIN_C13 -to o_vgag[1] set_location_assignment PIN_D13 -to o_vgag[0] set_location_assignment PIN_D12 -to o_vgar[1] set_location_assignment PIN_E12 -to o_vgar[0]
