Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07482 Color/Palette Minor Always Nov 12, 2019, 09:20 Dec 9, 2019, 15:00
Tester xolson View Status Public Platform MAME (Official Binary)
Assigned To R. Belmont Resolution Fixed OS Windows Vista/7/8 (64-bit)
Status [?] Resolved Driver apple2.cpp
Version 0.215 Fixed in Version 0.217 Build 64-bit
Summary MESS-specific 07482: apple2, apple2e and clones: Graphics colors not matching original machines
Description The graphics colors on the mame apple2 series are not matching the original machines colors. The file A2Ee.COLOR.DEMOSOFT.png shows a screenshot of the mame output of the COLOR DEMOSOFT program. Magenta is too light/red, Dark Blue looks like lavender, purple looks pink, Dark Green is not dark, medium blue is light, light blue is grey, brown is greenish. The file Apple_II_low-resolution_graphics_demo_2.png shows what the colors should look like.
Steps To Reproduce Load DOS 3.3 System Master, RUN COLOR DEMOSOFT
Additional Information I have tested this on the apple2, apple2p, apple2e, and apple2ee they all give this same result.
Flags
Regression Version
Affected Sets / Systems apple2, apple2e and clones
Attached Files
png file icon A2Ee.COLOR.DEMOSOFT.png (29,017 bytes) Nov 12, 2019, 09:20 Uploaded by xolson
mame color bar screenshot
xolson
png file icon Apple_II_low-resolution_graphics_demo_2.png (6,865 bytes) Nov 12, 2019, 09:21 Uploaded by xolson
apple2 colors should be these
xolson
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Notes
4
User avatar
No.17258
R. Belmont
Developer
Dec 9, 2019, 04:15
I have updated the palette to the latest mathematical model from Apple II Video Display Theory at https://docs.google.com/spreadsheets/d/1rKR6A_bVniSCtIP_rrv8QLWJdj4h6jEU1jJj0AebWwg/edit

This revised palette seems to fix your complaints about the colors: magenta is darker, dark blue is more blue, purple is more purple, dark green is darker, medium blue is darker, etc, etc.
User avatar
No.17259
xolson
Tester
Dec 9, 2019, 06:48
Yay! Thanks, that will help when displaying double hires pictures.
User avatar
No.17260
xolson
Tester
Dec 9, 2019, 10:37
Looking at the web spreadsheet you linked to the only color I disagree with on it is "light blue" that looks like lilac to me. On actual hardware light blue is indeed somewhat close to that but it still seems bluer.
User avatar
No.17261
R. Belmont
Developer
Dec 9, 2019, 15:00
Matching real hardware on the A2 is rough because different monitors will display slightly different colors, and that's before you include color and tint controls and so on. That spreadsheet assumes an idealized NTSC monitor, which probably doesn't exist (a Sony BVM might be close). The end goal is that we'll output a digital representation of the video signal and a shader chain on the GPU will apply the NTSC processing with all the knobs available, but for now this does definitely improve the color on all the software I tried.