04211: dotrikun2: [possible] Color changes look different on the pcb.

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	sega/dotrikun.cpp
Version	0.141u1	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

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
Github Commit

Flags	Possible
Regression Version
Affected Sets / Systems	dotrikun2

Attached Files

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 ...
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.
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.
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.