Difference between revisions of "Sprite Masking and Overflow Test ROM"

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[[Image:Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png|320px|right]]
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[[File:Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png|320px|right]]
 
[[sonic:Nemesis|Nemesis]]<nowiki>'</nowiki> '''Sprite Masking and Overflow Test ROM''' is a test ROM used to verify the emulation of several [[Sega Mega Drive]] VDP quirks, including sprite limits.
 
[[sonic:Nemesis|Nemesis]]<nowiki>'</nowiki> '''Sprite Masking and Overflow Test ROM''' is a test ROM used to verify the emulation of several [[Sega Mega Drive]] VDP quirks, including sprite limits.
  
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==Test Results==
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==Test results==
 +
===Hardware===
  
−
[[Gens/GS]] r7+ (git: vdp-to-cpp/86948622) (also applies to [[Gens/GS II]])
+
===Emulators===
−
[[Image:Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png]]
+
Note: Using latest versions of emulators, unless otherwise stated.{{#vardefine:screenwidth|120}}
 +
{| class="prettytable sortable"
 +
!Emulator
 +
!Release date
 +
!class="unsortable"|H32 Mode
 +
!class="unsortable"|H40 Mode
 +
!class="unsortable"|Comments
 +
|-
 +
|[[AGES]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[BizHawk]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[BlastEm]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[D-DGen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[DebuGens]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[DGen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[DrMD]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[DualGens]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Exodus]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[FB Alpha]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[GenaDrive]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genecyst]]
 +
|1998-08-18
 +
|{{bobscreen|SMaOTR H32 Genecyst.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|SMaOTR H40 Genecyst.png|width={{#var:screenwidth}}}}
 +
|
 +
|-
 +
|[[GenEm]] (DOS)
 +
|1997-05-20
 +
|{{bobscreen|SMaOTR H32 GenEm.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|SMaOTR H40 GenEm.png|width={{#var:screenwidth}}}}
 +
|Images are cropped to 320x200.
 +
|-
 +
|[[Generator (emulator)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genesis Plus]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genesis Plus GX]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genesis4iphone]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genital]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens (Nick o'DIMM)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens (XPort)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens KMod]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens Plus!]]
 +
|2005-08-06
 +
|{{bobscreen|SMaOTR H32 GensPlus.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|SMaOTR H40 GensPlus.png|width={{#var:screenwidth}}}}
 +
|
 +
|-
 +
|[[Gens Re-Recording]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens Tracer]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens X]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gens/GS]]
 +
|2009-11-22
 +
|{{bobscreen|SMaOTR H32 GensGS.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png|width={{#var:screenwidth}}}}
 +
|
 +
|-
 +
|[[Gens/GS II]]
 +
|2016
 +
|{{bobscreen|SMaOTR H32 GensGS.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png|width={{#var:screenwidth}}}}
 +
|
 +
|-
 +
|[[Gens32]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Gensoid]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Genux]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[GigaDrive (GP32)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[HazeMD]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Higan]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[IDC Log Gens]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[JEnesis]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[JEnesisDS]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Kega]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Kega (emulator)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Kega Fusion]]
 +
|2010-03-07
 +
|{{bobscreen|SMaOTR H32 KegaFusion.png|width={{#var:screenwidth}}}}
 +
|{{bobscreen|SMaOTR H40 KegaFusion.png|width={{#var:screenwidth}}}}
 +
|
 +
|-
 +
|[[Kega Lazarus]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[KGen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[KGen98]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Mednafen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Megadrive Emulator]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Megasis]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Mimic]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[NeoGenesis]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[PGen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[PicoDrive]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[PicoDrive (Windows)]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[PicoDriveDS]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[PSPGenesis]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Regen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[RetroCopy]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[RetroDrive]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[SegaEMU]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[SGens]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[St0rm]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[VGen]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Xe]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Xega]]
 +
|
 +
|
 +
|
 +
|
 +
|-
 +
|[[Xenesis]]
 +
|
 +
|
 +
|
 +
|
 +
|}
  
−
TODO: Add test results from other emulators.
+
==External links==
−
 
 
−
==External Links==
 
 
* [http://gendev.spritesmind.net/forum/viewtopic.php?p=8364 http://gendev.spritesmind.net/forum/viewtopic.php?p=8364] Original topic discussing emulation sprite masking, along with the post of the Test ROM
 
* [http://gendev.spritesmind.net/forum/viewtopic.php?p=8364 http://gendev.spritesmind.net/forum/viewtopic.php?p=8364] Original topic discussing emulation sprite masking, along with the post of the Test ROM
  
 
[[Category:Emulation]]
 
[[Category:Emulation]]
−
[[Category:Sega Community Development Guide]]
 

Latest revision as of 07:49, 7 July 2022

Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png

Nemesis' Sprite Masking and Overflow Test ROM is a test ROM used to verify the emulation of several Sega Mega Drive VDP quirks, including sprite limits.

Tests

The following tests are performed by the Sprite Masking and Overflow Test ROM.

Terminology:

  • H32 == 256x224 display mode
  • H40 == 320x224 display mode.
  • Sprite mask: A sprite with X=0.

Tests:

  1. Max Sprites Per Line: 16 in H32, 20 in H40.
  2. Max Sprite Dots - Basic: Up to 256 sprite dots in H32; 320 in H40.
  3. Max Sprite Dots - Complex: Same as previous, except it verifies that sprites are cut off in the middle.
  4. Sprite Mask: Verifies that lower-priority sprites are masked if a sprite mask exists and is not the first sprite on the line.
  5. Sprite Mask S1: Verifies that lower-priority sprites are *not* masked if a sprite mask exists and is the first sprite on the line.
  6. Mask S1 On Dot Overflow: Verifies that sprite masks at the beginning of the line are ineffective if sprite dot overflow occurs on the previous line.
  7. Mask S1,X=1 S2,X=0: Verifies that the non-existent sprite masking "Mode 2" is not implemented.
  8. Mask S1,X=40 S2,X=0: Same as previous.
  9. Max Sprites Per Frame: 64 in H32, 80 in H40.

For tests with two results, the left result indicates that the minimum boundary is respected, and the right result indicates that the maximum boundary is respected.

Test #6 is conditional on test #5 passing. If test #5 passes, then test #6 passing is an error (indicated by a red line underneath "PASS").

Downloads

Download.svg

Download Sprite Masking and Overflow Test ROM
Multiple downloads available

Test results

Hardware

Emulators

Note: Using latest versions of emulators, unless otherwise stated.

Emulator Release date H32 Mode H40 Mode Comments
AGES
BizHawk
BlastEm
D-DGen
DebuGens
DGen
DrMD
DualGens
Exodus
FB Alpha
GenaDrive
Genecyst 1998-08-18

SMaOTR H32 Genecyst.png

SMaOTR H40 Genecyst.png

GenEm (DOS) 1997-05-20

SMaOTR H32 GenEm.png

SMaOTR H40 GenEm.png

Images are cropped to 320x200.
Generator (emulator)
Genesis Plus
Genesis Plus GX
Genesis4iphone
Genital
Gens
Gens (Nick o'DIMM)
Gens (XPort)
Gens KMod
Gens Plus! 2005-08-06

SMaOTR H32 GensPlus.png

SMaOTR H40 GensPlus.png

Gens Re-Recording
Gens Tracer
Gens X
Gens/GS 2009-11-22

SMaOTR H32 GensGS.png

Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png

Gens/GS II 2016

SMaOTR H32 GensGS.png

Gens-gs-r7plus-vdp-to-cpp-86948622-SpriteMaskingTestRom.png

Gens32
Gensoid
Genux
GigaDrive (GP32)
HazeMD
Higan
IDC Log Gens
JEnesis
JEnesisDS
Kega
Kega (emulator)
Kega Fusion 2010-03-07

SMaOTR H32 KegaFusion.png

SMaOTR H40 KegaFusion.png

Kega Lazarus
KGen
KGen98
Mednafen
Megadrive Emulator
Megasis
Mimic
NeoGenesis
PGen
PicoDrive
PicoDrive (Windows)
PicoDriveDS
PSPGenesis
Regen
RetroCopy
RetroDrive
SegaEMU
SGens
St0rm
VGen
Xe
Xega
Xenesis

External links

Retrieved from "https://segaretro.org/index.php?title=Sprite_Masking_and_Overflow_Test_ROM&oldid=792957"