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
(hid repeated DSP1) |
(DR mapped to A Bus) |
||
| 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'''. | 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: | ||
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