04403: bouldash: First tilemap is offset by 1 pixel

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04403	Graphics	Minor	Always	Jul 3, 2011, 12:19	Dec 8, 2018, 22:42

Tester	Haze	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	AWJ	Resolution	Fixed	OS
Status [?]	Resolved			Driver	dataeast/dec0.cpp
Version	0.143	Fixed in Version	0.154	Build
		Fixed in Git Commit		Github Pull Request #

Summary	04403: bouldash: First tilemap is offset by 1 pixel
Description	Since rewriting the Deco BAC06 tilemap emulation I've noticed that the first tilemap on bouldash is offset horizontally by a single pixel, leaving an unwanted line of pixels along the left edge of the screen, and part of the radar. This could be fixed with a kludge (simply offsetting that layer for that game) but probably requires more investigation. a) does this apply to all dec0.c games, or just bouldash? b) is it the result of an incorrect register hookup (the way different games access some of the control registers was a bit weird so some of the control regs currently act as mirrors, see triothep comment) c) check it isn't related to the initial state of the protection mapping d) make sure the real board doesn't do the same (it seems badly programmed in general)
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	bouldash

Attached Files	bouldash_143.png (21,302 bytes) Jul 3, 2011, 14:43 Uploaded by Tafoid Snap from MAME 0.143 showing graphics on left of screen and right of radar.

No.15883 MetalGod Senior Tester Dec 8, 2018, 16:03	This is fixed since mame 0.154
No.15887 M.A.S.H. Senior Tester Dec 8, 2018, 22:00	Fixed by Alex Jackson in 0.154. He added SCREEN_RAW_PARAMS to dec0.c: https://git.redump.net/mame/commit/?id=5a76d01492ed32693610b887e8d7ca216e2929dd