NameName Official page: frank.rh1.tech — hub for all FRANK boards and firmware. i386 PC Emulator for RP2350 (Raspberry Pi Pico 2) with VGA/HDMI output, SD card storage, PS/2 and USB keyboard/mouse, NES gamepad, and audio output. Based on Tiny386 by Chunhui He. Full i386 (and partially i486/i586) CPU emulation with optional x87 FPU Up to 8MB RAM (using 8MB PSRAM) VGA and HDMI graphics output (text modes and graphics up to 640x480) Sound: AdLib OPL2, Sound Blaster 16, PC Speaker, Tandy, Covox, Disney Sound Source SD card support for floppy, hard disk, and CD-ROM images Runtime disk manager (Win+F12) for hot-swapping disk images Settings menu (Win+F11) for changing emulator configuration PS/2 keyboard and mouse input USB keyboard and mouse input (via native USB Host) NES gamepad support with mouse emulation mode Boots DOS, Windows 3.x, Windows 95, Linux, and more This firmware is designed for RP2350-based boards with integrated VGA/HDMI, SD card, and keyboard input: Raspberry Pi Pico 2 (RP2350) or compatible board 8MB PSRAM (required for extended memory) VGA or HDMI connector SD card module (SPI mode) PS/2 keyboard (directly connected) - OR - USB keyboard (via native USB port) Audio output (optional): I2S DAC or PWM Note: When USB HID is enabled, the native USB port is used for keyboard/mouse input. USB serial console (CDC) is disabled in this mode; use UART for debug output. Four GPIO layouts are supported: M1, M2, PC (Olimex), and Z2 (Waveshare). Signal M1 GPIO M2 GPIO Base 6 12 Range 6-13 12-19 Signal M1 GPIO M2 GPIO CLK 2 6 CMD 3 7 DAT0 4 4 DAT3/CS 5 5 Signal M1 GPIO M2 GPIO CLK 0 2 DATA 1 3 Signal M1 GPIO M2 GPIO CLK 14 0 DATA 15 1 Signal M1 GPIO M2 GPIO CLK 14 20 DATA 16 26 LATCH 15 21 Signal M1 GPIO M2 GPIO DATA 26 9 BCLK 27 10 LRCLK 28 11 Create a 386/ directory on your SD card: SD Card Root/ └── 386/ ├── config.ini # Configuration file ├── bios.bin # SeaBIOS ROM (required) ├── vgabios.bin # VGA BIOS ROM (required) ├── dos622.img # Hard disk image ├── boot.img # Floppy image └── ... # Other disk images Download SeaBIOS and VGA BIOS from the SeaBIOS releases or use bios.bin/vgabios.bin from sdcard/386. Create 386/config.ini: [pc] mem=8M bios=bios.bin vga_bios=vgabios.bin [frank-386] cpu_freq=504 psram_freq=166 Floppy Images (.img): Standard 1.44MB floppy images (1474560 bytes) Create with: dd if=/dev/zero of=floppy.img bs=512 count=2880 Format with DOS or use pre-made DOS boot disks Hard Disk Images (.img): Raw disk images up to 2GB Create with: dd if=/dev/zero of=hdd.img bs=1M count=512 Use FDISK and FORMAT from DOS to partition and format CD-ROM Images (.iso): Standard ISO 9660 images Use CD burning software to create ISOs from CDs At Boot: Configure disk images in config.ini as shown above. At Runtime (Disk Manager): Press Win+F12 to open the Disk Manager Use arrow keys to select a drive (A:, B:, C:, D:, E:) Press Enter to browse disk images in the 386/ directory Select an image file to insert, or eject the current disk Press Escape to close the Disk Manager Changes made via Disk Manager are saved to config.ini automatically. Shortcut Action Win+F12 Open Disk Manager Win+F11 Open Settings Menu Ctrl+Alt+Delete System reset (sent to guest OS) Configure emulator settings at runtime: Memory size (1-8 MB) CPU generation (386/486/586) FPU emulation on/off Sound devices (AdLib, SB16, PC Speaker, Tandy, Covox, MPU-401, DSS) PS/2 or USB Mouse on/off NES Mouse on/off (emulate mouse with NES gamepad D-pad, B=left click, A=right click) RP2350 CPU frequency and voltage PSRAM / Flash frequency Settings are saved to config.ini and take effect after restart. Manage disk images without restarting: Insert/eject floppy images (A:, B:) Insert/eject hard disk images (C:, D:) Insert/eject CD-ROM images (E:) Install the Raspberry Pi Pico SDK (version 2.0+) Set environment variable: export PICO_SDK_PATH=/path/to/pico-sdk Install ARM GCC toolchain # Clone the repository git clone https://github.com/rh1tech/frank-386.git cd frank-386 # Build with default settings (M2 board, 378MHz, PS/2 keyboard) ./build.sh # Build for M1 board ./build.sh -M1 # Build with USB keyboard support ./build.sh --usb-hid # Custom build ./build.sh -b M1 -c 504 -p 166 --debug Option Description -b, --board Board variant (default: M2) -c, --cpu CPU speed: 378 (default), 504 -p, --psram PSRAM speed: 133 (default), 166 --usb-hid Enable USB keyboard (disables USB serial) --hdmi Force HDMI output --debug Enable debug output -clean Clean build directory first Option Description -DPICO_BOARD=pico2 Build for RP2350 (default) -DBOARD=M1 Use M1 GPIO layout -DBOARD=M2 Use M2 GPIO layout (default) -DBOARD=PC Use Olimex PICO-PC layout -DBOARD=Z2 Use Waveshare RP2350-PiZero layout -DCPU_SPEED=378 CPU clock in MHz (378, 504) -DPSRAM_SPEED=133 PSRAM clock in MHz (133, 166) -DUSB_HID_ENABLED=ON Enable USB keyboard (disables USB serial) -DDEBUG_ENABLED=ON Enable verbose debug logging -DFORCE_HDMI=ON Force HDMI output To build all firmware variants: # Interactive (prompts for version) ./release.sh # With version number ./release.sh 1.02 This creates firmware files in the release/ directory: frank-386_m1_.uf2 - M1 board (Murmulator) frank-386_m2_.uf2 - M2 board (Murmulator) frank-386_pc_.uf2 - Olimex PICO-PC frank-386_z2_.uf2 - Waveshare RP2350-PiZero # With device in BOOTSEL mode: picotool load build/frank-386.uf2 # Or use the flash script: ./flash.sh Use setup /im to bypass memory check. Use patcher9x. Set redirector = 1 in config.ini. For PS/2: Check keyboard connection and GPIO pins For USB: Ensure firmware was built with --usb-hid option Ensure SD card is formatted as FAT32 Check SD card module connections Verify 386/ directory exists on SD card MIT License. See LICENSE for details. Mikhail Matveev & DnCraptor This project is based on the following open-source projects: Project: Tiny386 - x86 PC Emulator Author: Chunhui He License: BSD 3-Clause Description: The core i386 CPU emulator and PC peripheral emulation (8259 PIC, 8254 PIT, 8042 keyboard controller, VGA, sound devices). Project: Pico-286 Author: xrip License: MIT Description: RP2350 platform integration, disk management, VGA driver concepts. Project: QuakeGeneric Author: DnCraptor License: GPL v2 Description: RP2350 hardware integration patterns, Murmulator platform support, and PS/2 mouse driver implementation. Project: QEMU Authors: Fabrice Bellard (2003-2017), Vassili Karpov "malc" (2003-2005), Joachim Henke (2006) License: MIT Description: PC peripheral emulation code including 8259 PIC, 8254 PIT, 8257 DMA, 8042 keyboard controller, PCI bus, PC speaker, VGA, and AdLib OPL2 proxy. Project: MAME Author: Tatsuyuki Satoh (1999-2000) License: LGPL 2.1+ Description: FM OPL sound generator (fmopl) for AdLib emulation, forked from MAME and relicensed under LGPL. Project: inih Author: Ben Hoyt (2009-2020) License: BSD 3-Clause Description: Simple INI file parser for configuration file handling. Project: SeaBIOS Authors: Kevin O'Connor and contributors License: GNU LGPL v3 Description: x86 BIOS and VGA BIOS firmware. Project: FatFs Author: ChaN (2014, 2021) License: FatFs License (BSD-style) Description: Generic FAT filesystem module for SD card access. Author: Carl John Kugler III (2021) License: Apache 2.0 Description: FatFs utility functions for error handling and result string conversion. Project: Pico SDK Author: Raspberry Pi (Trading) Ltd. (2020) License: BSD 3-Clause Description: PIO SPI driver for SD card communication. You can’t perform that action at this time.