# picox86

**Repository Path**: bobde163/picox86

## Basic Information

- **Project Name**: picox86
- **Description**: 使用PR2040模拟X86平台
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-04-06
- **Last Updated**: 2024-04-06

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# picox86
x86 emulator on Raspberry Pi Pico

![](img/picox86color.jpg)
Several opcodes implemented, more to go. Now in color and realtime register display


![](img/picox86pcb.jpg)
PCB front, got some awful cheap solder at home, better get some good quality solder
![](img/picox86back.jpg)
PCB back fitted with RAM and FLASH (and some decoup + tank capacitors) and the 8 270 Ohm resistors
![](img/picox86screen.jpg)
First attempts for basic output in VGA 16x8 font
![](img/picox86screen2.jpg)
Getting CPU temperature, start with register output
![](img/picox86screen3.jpg)
2021-03-03 FLASH working, can read out JEDEC to verify, print out CPU regs realtime and read first sector to boot from to 0000:7C00 (INT 0x19). Will put some initial sources online soon





Quick links:

[Wren6991 PicoDVI](https://github.com/Wren6991/PicoDVI)

[Next186](https://opencores.org/projects/next186_soc_pc/)

About this Project
-----------------

I started this project inspired by the fact that the Pi Pico can actually output DVI streams without any external component (only 8 resistors and a connector). This is found and proved by Engineer Wren6991 (Check his PicoDVI repository [here](https://github.com/Wren6991/PicoDVI))

A similar x86 project is also made by Nicolae Dumitrache with his FPGA version of a 80186. This is a complete working solution, however I think it would be very cool if a simple MCU can have a minimal implementation too using PIO,DMA and some trial and error.



Hardware used on bottom of PCB:

- SPI Flash chip 16Mbit (for storing FDD image to boot from, Goal is that this can be programmed in circuit by USB or TTL UART)
- QSPI PSRAM 64Mbit (can clock up to 133 MHz / 4bit) which results in up to 66 Mbyte/sec sequential access and about 13 Mbyte/sec random access. Goal is to offload the RAM access with PIO and a small cache.