Load the machine
Epson ROMs, memory banks and character generator establish the initial state.
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PLAYABLE MILESTONE
Emulation · Preservation
EmuQX10
A C-based Epson QX-10 emulator that boots real CP/M 2.2, launches MultiFont BASIC and plays a graphical maze from 1983.
overview
Reviving an Epson QX-10
EmuQX10 rebuilds in C the machine around the Z80: banked memory, video, floppy, DMA, interrupts, timers, keyboard, clock and audio. The core loads period ROM and disk images, boots CP/M to its prompt, starts MultiFont BASIC and now runs the Labyrinthe program with graphics, arrow controls and sound.
Availability
Playable technical preview
The target scenario — CP/M, MFBASIC, then Labyrinthe — is playable on macOS arm64. Remaining polish covers graphics accuracy, audio validation and future Windows/Linux backends.
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At a glance
At a glance
Machine
Epson QX-10
Year
1983
CPU
Z80
System
CP/M 2.2
Display
640×400 mono
Current target
macOS arm64
What's in it
What's in it
- F—01 Boots real CP/M 2.2 from a compressed Teledisk image
- F—02 Z80 and QX-10 peripheral emulation written in C
- F—03 μPD7220 text and graphics rendering at 640×400 monochrome
- F—04 Native macOS window through Cocoa and Metal, with no SDL
- F—05 AZERTY/QWERTY keyboard, real-time 55 Hz loop and CoreAudio beeper
- F—06 Headless backend, PPM framebuffer and CTest coverage
Boot path
From the real IPL to a BASIC game.
The emulator does not fake a result: it advances the original firmware and operating system through reconstructed devices, cycle by cycle.
Read the floppy
FDC and DMA decompress the TD0 image and genuinely load CP/M into memory.
Drive the system
Keyboard, interrupts, timers and GDC carry the real system to the prompt and into MFBASIC.
Play in real time
Labyrinthe draws its primitives, receives arrow keys and produces sound as on the target machine.
Screens
Screens
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Distribution
Separating original code from software heritage.
The emulator core is original work, but Epson/Digital Research ROM and disk images remain copyrighted and stored in a private repository. Public distribution will need to handle those assets separately.
- P—01 Machine code structured around a pure-C platform interface
- P—02 Accuracy oracle based on devices documented by MAME
- P—03 ROM and disk images not intended for redistribution with public code
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