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DSP1: Difference between revisions
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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: | |||
* [[DSP1/Attitude | Attitude]] | |||
* [[DSP1/Distance | Distance]] | |||
* [[DSP1/Gyrate | Gyrate]] | |||
* [[DSP1/Inverse | Inverse]] | |||
* [[DSP1/Multiply | Multiply]] | |||
* [[DSP1/Objective | Objective]] | |||
* [[DSP1/Parameter | Parameter]] | |||
* [[DSP1/Polar | Polar]] | |||
* [[DSP1/Project | Project]] | |||
* [[DSP1/Radius | Radius]] | |||
* [[DSP1/Range | Range]] | |||
* [[DSP1/Raster | Raster]] | |||
* [[DSP1/Rotate | Rotate]] | |||
* [[DSP1/Scalar | Scalar]] | |||
* [[DSP1/Subjective | Subjective]] | |||
* [[DSP1/Target | Target]] | |||
* [[DSP1/Triangle | 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. <sup>[2]</sup> | |||
[[File:DSP1.png|thumb]] | |||
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.<sup>[3]</sup> | |||
[[Category:Enhancement Chips]] | [[Category:Enhancement Chips]] | ||
[[Category:Integrated Circuits]] | [[Category:Integrated Circuits]] | ||
[[Category:DSP1]] | |||
=== See Also === | |||
* [[DSP2]] | |||
* [[DSP3]] | |||
* [[DSP4]] | |||
=== External Links === | === External Links === | ||
# https://snescentral.com/article.php?id=1239 | |||
# paragraph 4.4 on [https://archive.org/details/SNESDevManual/book2/page/n288 page 3-4-2 of Book II] of the official Super Nintendo development manual | |||
# [https://archive.org/details/SNESDevManual/book2/page/n281 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 | |||
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