Node Emulator Service Platform

A cloud retro-gaming platform to enable friends and communities to collaborate and stream emulated console games.

Technology Stack

NodeJS
MongoDB
GoInstant
Node Emulator Services (node-nes)
and more...

Platform Terminology

Micro Instance

This refers to the controller, canvas-sync, and audio-sync streams that connect the players to the process running the ROM.

node-nes

source/ui.js

Loads pixel data into canvas among many other things.

source/nes.js

Defines, prototypes the JSNES object.
Lots of initial settings and configurations.

source/rom.js

Defines the nes.rom object.
''load'' reads .nes format rom data and identifies mappers.
.NES file format
''getMirroringType''
''getMapperName''
''mapperSupported''
''createMapper''

source/cpu.js

Sets up all the opcodes for the 5602 CPU chip.

source/ppu.js

Emulates the Picture Processing Unit, (ie. the video controller) for the NES.

endFrame

Draw spr#0 hit coords
clip sprites or background if needed
pass buffer to writeFrame

writeFrame

Takes current and previous pixel buffer as input
Loops over all pixels checking for changes (pixel != prevBuffer[i])
Use putImageData to populate canvas context with new pixel data