07248: a5200 [galaxian]: Galaxian has graphics corruption, gameplay irregularities

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07248	Graphics	Minor	Always	Mar 2, 2019, 02:21	Oct 27, 2022, 17:48

Tester	procyon	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Confirmed			Driver	atari/atari400.cpp
Version	0.207	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07248: a5200 [galaxian]: Galaxian has graphics corruption, gameplay irregularities
Description	Upon launching the Atari 5200 with the Galaxian software, the set of aliens at the top appear duplicated. Starting the game causing the initial music to play slowly. Once the game is in progress, one set of aliens moves at the typical rate, while the second set moves in lockstep with the player. The player's bullet appears detached from the ship, although it does fire and collide correctly.
Steps To Reproduce	Launch Galaxian software for Atari 5200, begin playing a new game.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	a5200 [galaxian]

Attached Files

No.20583 Tafoid Administrator Oct 3, 2022, 19:41	Partially fixed with https://github.com/mamedev/mame/commit/baef2b80f656ce3eaf677e2d59c3b2063154c8ec Current issue: Rainbow line on the left shows up when aliens scroll left/right and hit certain points.
No.20671 procyon Tester Oct 27, 2022, 17:48	As pointed out by Tafoid, since version 0.249, this is significantly improved. The game is playable. There are only three noticeable bugs: 1) The player's bullet remains floating above the ship. When it is fired, it travels up until it connects with an enemy or reaches the top of the screen, and then resets above the ship. 2) The player's bullet does not always successfully collide with the lowest enemy of a column. 3) The above mentioned rainbow artifact that appears on the left side of the screen when the enemies move to certain positions. It seems to come and go as the enemies march back and forth. I don't know how many of these bugs may be present in the actual Galaxian software, but I don't remember encountering them on real hardware.

No.20583

Tafoid

Administrator

Oct 3, 2022, 19:41

Partially fixed with https://github.com/mamedev/mame/commit/baef2b80f656ce3eaf677e2d59c3b2063154c8ec
Current issue: Rainbow line on the left shows up when aliens scroll left/right and hit certain points.

No.20671

procyon

Tester

Oct 27, 2022, 17:48

As pointed out by Tafoid, since version 0.249, this is significantly improved. The game is playable. There are only three noticeable bugs:

1) The player's bullet remains floating above the ship. When it is fired, it travels up until it connects with an enemy or reaches the top of the screen, and then resets above the ship.
2) The player's bullet does not always successfully collide with the lowest enemy of a column.
3) The above mentioned rainbow artifact that appears on the left side of the screen when the enemies move to certain positions. It seems to come and go as the enemies march back and forth.

I don't know how many of these bugs may be present in the actual Galaxian software, but I don't remember encountering them on real hardware.