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DSP1: Difference between revisions
From SnesLab
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'''DSP1''' in an [[enhancement chip]] with part number 22943 that implements common 3D math operations. | '''DSP1''' in an [[enhancement chip]] with part number 22943 that implements common 3D math operations. | ||
The DSP1 has registers named '''DR''' and '''SR'''. | The DSP1 has registers named '''DR''' and '''SR'''. DR is mapped on the [[A Bus]]. | ||
The following commands are supported: | The following commands are supported: | ||
* [[DSP1/Attitude]] | * [[DSP1/Attitude | Attitude]] | ||
* [[DSP1/Distance]] | * [[DSP1/Distance | Distance]] | ||
* [[DSP1/Gyrate]] | * [[DSP1/Gyrate | Gyrate]] | ||
* [[DSP1/Inverse]] | * [[DSP1/Inverse | Inverse]] | ||
* [[DSP1/Multiply]] | * [[DSP1/Multiply | Multiply]] | ||
* [[DSP1/Objective]] | * [[DSP1/Objective | Objective]] | ||
* [[DSP1/Parameter]] | * [[DSP1/Parameter | Parameter]] | ||
* [[DSP1/Polar]] | * [[DSP1/Polar | Polar]] | ||
* [[DSP1/Project]] | * [[DSP1/Project | Project]] | ||
* [[DSP1/Radius]] | * [[DSP1/Radius | Radius]] | ||
* [[DSP1/Range]] | * [[DSP1/Range | Range]] | ||
* [[DSP1/Raster]] | * [[DSP1/Raster | Raster]] | ||
* [[DSP1/Rotate]] | * [[DSP1/Rotate | Rotate]] | ||
* [[DSP1/Scalar]] | * [[DSP1/Scalar | Scalar]] | ||
* [[DSP1/Subjective]] | * [[DSP1/Subjective | Subjective]] | ||
* [[DSP1/Target]] | * [[DSP1/Target | Target]] | ||
* [[DSP1/Triangle]] | * [[DSP1/Triangle | Triangle]] | ||
The microcode implementing them is in the DSP1's internal ROM. | The microcode implementing them is in the DSP1's internal ROM. | ||
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# [https://archive.org/details/SNESDevManual/book2/page/n281 Page 3-1-2], lbid. | # [https://archive.org/details/SNESDevManual/book2/page/n281 Page 3-1-2], lbid. | ||
# https://problemkaputt.de/fullsnes.htm#snescartdspnst010st011biosfunctions | # https://problemkaputt.de/fullsnes.htm#snescartdspnst010st011biosfunctions | ||
# https://snescentral.com/chips.php?chiptype=DSPx | |||
# https://en.m.wikipedia.org/wiki/NEC_%C2%B5PD7720 | |||
Latest revision as of 05:50, 10 January 2024
DSP1 in an enhancement chip with part number 22943 that implements common 3D math operations.
The DSP1 has registers named DR and SR. DR is mapped on the A Bus.
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
External Links
- https://snescentral.com/article.php?id=1239
- paragraph 4.4 on page 3-4-2 of Book II of the official Super Nintendo development manual
- Page 3-1-2, lbid.
- https://problemkaputt.de/fullsnes.htm#snescartdspnst010st011biosfunctions
- https://snescentral.com/chips.php?chiptype=DSPx
- https://en.m.wikipedia.org/wiki/NEC_%C2%B5PD7720