Contains essential information for experienced hackers. Covers topics such as joypads, DMA & HDMA transfer, sprites, and registers. Note though, there are inaccuracies.

• Has “big-endian” and “little-endian” mixed up
• OAM high-table bits are wrong
• No information on the name selection bits.
• $2115 bit 7 for writing words is backwards
• BG priority map is only correct for Modes 0 and 1
• Missing $213f effect on $213c/d
• Multitap info for $4218-f is wrong
• Incorrect info: “if a DMA transfer is initiated while a HDMA channel is enabled, nothing will happen.”
• $43×0 bit 7 is not DMA only
• … and probably more