This wiki page will serve as an eratta for mistakes the superfamicom community has found in the offical SNES manual from Nintendo.

On page 3-2-2, the two's complement decimal representation of a BRR sample-point is -8 ~ 7, not -7 ~ +8.

On page C-10 (Book II), the EI and DI instructions have 1 and 0 in the Z spot of the "flags affected" field; they should be in the I spot.

On page 2-1-4 section 1.4, the word "flag" should be plural. There are two flags, each in the screen mode register (SCMR). The flag that controls Game Pak RAM access is bit 3 (RAN), and the flag that controls Game Pak ROM access is bit 4 (RON).

On page 3-7-4, Figure 3-7-1, the formula for Bent Line Mode is missing a negative sign in front of the exponent t.

In Figure 3-1-1 of Book 1, the System Block Diagram, the "SNES BUS" label should not be on the bus that connects the SNES CPU to the SOUND CPU. This bus is only 4 wires. "Stereo" is also misspelled on this same page.

The SNES mouse left button is labeled the right actuator, and vice versa.

At the bottom of page 4-10-3 of book 2, D0 is used to refer to an entire 8-bit value but the diagram shows D0 is only bit 0 of that value.

Page 1-2-1 of book 2 states that the SA-1 is internally composed of 9 components, but 11 are shown in the block diagram. (The next page lists the 9.)

In Figure 3-1-1 of Book 2, the DSP1 chip connects to cartridge memory outside the cartridge. This is wrong.

In the confidentiality agreement in Book 1, there is a curly brace after "Letterhead" at the top, where there should be a closing square bracket.

The following registers described in Book 1 have blank names:

43X0H (X : channel number <0 ~ 7>) Parameter for DMA Transfer page 2-28-10 43X1H (X : channel number <0 ~ 7>) B-Bus Address for DMA page 2-28-11 43X2H / 43XH / 43X4H (X : channel number <0 ~ 7>) Table address of A-Bus for DMA <A1 Table Address> page 2-28-11 43X5H / 43X6H / 43X7H (X : channel number <0 ~ 7>) Data Address Store By H-DMA & Number of Byte to be transferred Settings By General Purpose Dma page 2-28-12 43X8H / 43X9H (X : channel number <0 ~ 7>) Table Address of A-Bus By DMA <A2 Table Address> page 2-28-13 43XAH (X : channel number <0 ~ 7>) The Number of Lines to be Transferred By H-DMA page 2-28-13

The top of page 4-3-4 of Book 2 mention five one-byte blocks, but then goes on to contradict itself by calling blocks 2,3, and 4 "bits"

On page iv, the list of Figures in Book 2, "Definition of One Bit" should be "Definition of One Byte" and is actually on page 4-3-3

On pages 2-24-4 and 2-24-7, the word "Enable" is misspelled "Ensble" in the controller read row

Page 3-1-1 of Book 1 claims that the SPC700 clock speed is 2.48 MHz - this should say 2.048 MHz

On pages 1-2-37 and 1-2-38 of Book 1 in the cartridge list legend, the exact same symbol (a hollow circle) is used to denote both "Now available" and "In development"

According to, the blank space between 7FFFH and FFBFH on page 3-1-3 is actually used by several games.

On the gain parameters page of Book 1, "0 -> 0/10" appears to be going in the wrong direction as it is in the Decrease Mode Exponential column.

On page 2-1-2, the figure number in the text to refer to for the interlace explanation is wrong

On page 3-7-9, we have "The output of this register is the sum of main volume and echo volume with a sign bit" should say "these registers" as there is four of them.