Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
00448 Graphics Minor Have not tried Jan 29, 2008, 16:24 Nov 4, 2018, 10:45
Tester Thenasty View Status Public Platform
Assigned To Resolution Open OS
Status [?] Confirmed Driver galaxian.cpp
Version 0.95u6 Fixed in Version Build
Summary 00448: pisces: Sometimes there is a square block on the bottom right in attract mode, or gameplay.
Description Sometimes there is a square block on the bottom right in attract mode, or gameplay.

Update by Machone: This seems to be related to the main CPU speed. If you underclock or overclock the z80 processor by just 1%, the problem goes away. The current speed of the z80 in MAME is 3.072mhz, so perhaps this is wrong and should be set at 3mhz?
Steps To Reproduce
Additional Information Formerly driver galaxian.c (changed in 0.124u1)
Regression Version
Affected Sets / Systems pisces
Attached Files
png file icon v0.100.png (1,921 bytes) Apr 4, 2008, 09:14
png file icon v0.124u1.png (4,834 bytes) Apr 4, 2008, 09:24
rar file icon savestate_0124u1.rar (8,691 bytes) Apr 4, 2008, 09:33
There are no relationship linked to this issue.
User avatar
Apr 4, 2008, 07:54
I've seen this squares on many games, just look on the recent bug in cp1 cps2 driver. Also this happens to me in vs. games as well, but not always.
User avatar
Apr 4, 2008, 09:24
edited on: Apr 4, 2008, 09:25
I think this is different from the case of cps1 and cps2 drivers.
I uploaded screenshots taken with 0.100 and 0.124u1.
User avatar
Apr 4, 2008, 09:45
mAybe this is more general bug.
User avatar
Senior Tester
Nov 4, 2018, 10:45
edited on: Nov 4, 2018, 23:05
Tested on mame 0.203

More testing done. The bug can ocurred in two situations. Attract mode and gameplay.
 - The bug appeared always in attract mode before mame 0.114
 - The bug still appears randomly in gameplay

Fixed in attract mode between mame 0.113 and mame 0.114
In mame 0.203 the bug still ocurrs during gameplay, but it is quite rare to ocurr (5%)