DSP1

DSP1 in an enhancement chip with part number 22943 that implements common 3D math operations.

The DSP1 has registers named DR and SR.

The following commands are supported:

• Attitude
• Distance
• Gyrate
• Inverse
• Multiply
• Objective
• Parameter
• Polar
• Project
• Radius
• Range
• Raster
• Rotate
• Scalar
• Subjective
• Target
• Triangle

The microcode implementing them is in the DSP1's internal ROM.

The DSP1 hardware supports DMA, but the SNES does not have a way to kick it off. ^[2]

In Figure 3-1-1 of the manual, the connection between the DSP1 chip and the 62-pin cartridge slot incorrectly appears outside the game pak.^[3]

See Also

• DSP2
• DSP3
• DSP4

External Links

1. https://snescentral.com/article.php?id=1239
2. paragraph 4.4 on page 3-4-2 of Book II of the official Super Nintendo development manual
3. Page 3-1-2, lbid.
4. https://problemkaputt.de/fullsnes.htm#snescartdspnst010st011biosfunctions
5. https://snescentral.com/chips.php?chiptype=DSPx
6. https://en.m.wikipedia.org/wiki/NEC_%C2%B5PD7720