Audio
- smspower.org, SN76489.
- Texas Instruments, Texas instruments SN76489.
CPU
- smspower.org, Memory map.
- smspower.org, Registers.
- Sega, Sega Mk3 hardware reference manual - Rev1.
- Sega, Service manual schematics.
- NEC, D4168 data-sheet.
Graphics
- codeslinger.co.uk, VDP info.
- Charles MacDonald, Sega master system VDP documentation. 2002.
- smspower.org, Collision detection.
- Texas Instruments, TMS9918A, TMS9928A, TMS9929A video display processors data manual. 1982.
I/O
- smspower.org, Pause button.
Photography
- Evan Amos, The vanamo online game museum.
- Christopher Rivett, Christopher rivett - computer and video game enthusiast.