Javascript 1984

Auxiliary bus

Expansion bay

M4 expansion

MX4 bus / SD card + WiFi

Board powerDisabled

FirmwareM4ROM (bundled)

SD cardNo image loaded

Load

Raw FAT image (FAT16/FAT32), held in browser memory. Ejecting a read/write image downloads any changes the guest wrote.

M4 internet

Relay bridge / TCP + DNS

Internet accessDisabled

Browsers cannot open TCP sockets. Traffic is tunneled through the shared ws-unapi-relay service, which only permits public IPv4 hosts on common ports (23, 70, 80, 443, 2323).

Relay endpoint

Relay disabled

Opens the relay health page. Approve its certificate, then return here; reconnection is automatic.

For details see ws-unapi-relay.

One shared relay instance serves the 1983 and 1984 emulators. Run it with npm start from the 1983-msx-unapi-relay repository (defaults to ws://host:1983/unapi); or serve this page and the relay from one origin.

ROM slots

Upper ROM board / slots 0-31

ROM board fittedDisabled

Lower ROMOS_6128.ROM

16 KB ROM images (a 128-byte AMSDOS header is skipped automatically). Loading or ejecting a slot resets the machine. On the 6128 Plus, upper ROM reads come from the cartridge, so these slots are only visible on the CPC 6128.

Machine

Memory 128 KB

System monitor Loading emulator...

Drive A

Drive B

Input

Audio

Version loading...

Click display for keyboard

Drop DSK to Drive A, or CDT, CPR or SNA media here

RGB monitor 768 x 576 / Sharp

Scanlines 15% Brightness 100% Contrast 100% Red 100% Green 100% Blue 100%

Transport System

Media deck Virtual transport

Drive A No disk loaded

Load

Drive B No disk loaded

Load

Cartridge Select CPC 6128 Plus

Load

Snapshots Machine state

Load SNA

Input channel Port 1

JoystickUSB gamepad MouseAMX pointer

Joystick: waiting for gamepad... CPC joystick: idle Mouse: disabled

Picture Display control

Display size 100%

Sharp pixelsNearest-neighbour scaling

Optional on-screen keyboard