Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
04211 Color/Palette Minor Always Jan 26, 2011, 16:37 Sep 6, 2016, 17:35
Tester Smitdogg View Status Public Platform
Assigned To Resolution Invalid report OS
Status [?] Closed Driver dotrikun.cpp
Version 0.141u1 Fixed in Version Build
Summary 04211: dotrikun2: [possible] Color changes look different on the pcb.
Description The board acts a little funny on my supergun but the color swaps seen when you insert coins are different from the ones in MAME. I've dumped the rom on my board and it matches the one from dotrikun2 despite being labeled epr-13141. You can see a video of it running in 04210. It never swaps the background. Background is always black. In MAME the background color sometimes changes.
Steps To Reproduce
Additional Information
Flags Possible
Regression Version
Affected Sets / Systems dotrikun2
Attached Files
 
Relationships
related to 04210Acknowledged dotrikun, dotrikun2: Original PCB videos 
Notes
4
User avatar
No.07154
Kale
Developer
Jan 28, 2011, 17:48
edited on: Jan 28, 2011, 18:01
My guess is that bits 3,4 and 5 controls a second palette bit entry, some colors doesn't look to be 1bpp to me ...

EDIT: actually I believe that's some sort of gradient effect? Palette is always solid normally ...

User avatar
No.07202
Kale
Developer
Feb 15, 2011, 15:30
Running a trojan on this didn't gave any reasonable result (it gets too many off-syncs for extracting a proper behaviour). I believe that somebody with normal non-Supergun equipment should try to check the behaviour there.
User avatar
No.13121
hap
Developer
Sep 6, 2016, 11:51
Let's close this.

Homebrew development on this board here: http://www.chrismcovell.com/dottorikun.html
schematics are available, no evidence of more than 3bpp colors. I highly suspect it's video timing quirks on Smitty's equipment.
User avatar
No.13125
Haze
Senior Tester
Sep 6, 2016, 17:35
yeah, could be the same way that colours get 'sucked' out of the screen on CPS1 games and some Semicom games on some brands of monitor.