02826: spcenctr: Dark bands on trench are too dark; they should be lighter than the background.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02826	Known Issues/To-Do's	Minor	Always	Jan 14, 2009, 21:58	Nov 16, 2018, 02:08

Tester	chowell	View Status	Public	Platform
Assigned To		Resolution	Fixed	OS
Status [?]	Resolved			Driver	midw8080/mw8080bw.cpp
Version	0.129	Fixed in Version	0.174	Build
		Fixed in Git Commit		Github Pull Request #

Summary	02826: spcenctr: Dark bands on trench are too dark; they should be lighter than the background.
Description	Looking at the code for Space Encounters in the MAME source (video/mw8080bw.c), the dark bands drawn on the trench are currently set to black, the same as the background color. This makes the far end of the trench appear to vary in height, which is clearly undesirable. (By the way, the relevant #defines are all misnamed PHANTOM2_.) The actual machine does not have this problem. This Flash video of one in action shows clearly that the dark bands are not* black: http://www.outerworldarcade.com/arcade/space_encounters/space_encounters_video.html The brightness level of the bands seems to be determined by a resistor network visible on the right edge of the video board schematic in the Space Encounters manual, available here: http://www.outerworldarcade.com/arcade/space_encounters/manuals/SpaceEncounters.pdf The schematic is on page 22 of the PDF (page 21 of the original manual). Alas, I am not an electrical engineer and cannot trust my ability to determine the proper brightness levels from this schematic. Perhaps a MAME developer familiar with analog circuit networks can help. (I do realize that tracing the video circuit logic outputs is a task in itself.)
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original, Noted in Source
Regression Version
Affected Sets / Systems	spcenctr

Attached Files

No.03580 chowell Developer Jan 14, 2009, 22:59	Sorry, I hadn't noticed the following comment near the top of drivers/mw8080bw.c: Known issues/to-do's: * Space Encounters: verify trench colors Just consider this bug as a follow-up on that.
No.15772 MetalGod Senior Tester Nov 13, 2018, 14:10	This was fixed in mame 0.174 by qwijibo