We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

DSP1: Difference between revisions

From SnesLab
Jump to: navigation, search
(link to DSP1 demo)
(DR mapped to A Bus)
 
(15 intermediate revisions by the same user not shown)
Line 1: Line 1:
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'''.  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
# 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:

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]

DSP1.png

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

  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