Home Page Forums MAME MAME Graphical corruption on PowerMac 6100

Is anyone notcing intermittent and minor graphical corruption on the PowerMac 6100?

I am having trouble establishing a baseline for the behavior. I have seen it in System 7.1.2 and 7.5.5 whether in 256 or thousands of colors.

I noticed red bands showing up in the help screen of Microsoft Word 5.1a.

I also saw intermittent blotches of discoloration (usually black) showing up on the desktop pattern, sometimes disappearing when moving the mouse cursor around, sometimes not. Upon subsequent launches it may not occur at all.

Another test within two games, Day of the Tentacle and Full Throtle, saw similar blotches of random colors within the games. Weirdly, turning off the EPX graphic smoothing in those games seems to resolve the issue. Older games using EPX like Monkey Isand 2 are unaffected.

Test using some of the software list items. It is easier for devs to verify things when the software is easily available without any effort.
Having said that, I tested Day of the Tentacle (a .toast image that I renamed to .iso) on pmac6100 with System 7.6.1 and it appears to be working perfectly with no graphical issues in the intro scenes and the beginning of the level up to where the guy goes down the secret passage in the clock ... actually playing these large CD games further requires effort that very few people are going to do. I also played Ultimate Doom from the software list levels 1 and 2 and it works with no visible issues.
Post some screen shots that show the exact issues you are seeing.

Graphical corruption in the backgrounds of windows was a known thing prior to the August 4th PowerPC update, so if you're running the 0.289 release that's expected.

Ah. I'm always on latest src so didn't know about that known issue or that it was fixed.

@ameath: If you are serious about playing with pmac6100 you should be on top of it and use latest src and compile your own MAME. It isn't difficult using the 'made for noobs' how to compile tutorial on my site. A couple of typed commands and a couple of mouse clicks and it's done :-)

I am serious about testing the PowerMac 6100 and offering constructive questions and feedback. I am not a noob, so to speak, and have been posting on a range of Mac forums for years. I have been following the development of Mac compatibility on MAME for many months, and recently compiled my own copy of MAME off source. This was one of the versions I tested with, as well as the initial release of 0.289. However, this was before the 4th of August update, so my feedback may now be out of date. I was not aware I was supposed to only test off list items but I will do that next time. Maybe I misunderstood your tone, and if so please accept my apologies.

Doing testing on the latest src is the correct way especially when there were major improvements done very recently. That is more important now since MAME is only released every 2 months with lock-down about 1 week before that so the official release is already old and out of date by more than 1 week when released ;-)
You can test with any item you want but if someone has to find it and test it to verify your findings it may not be done, whereas software list items are quickly available.
Posting a pic of the issue always helps rather than just text alone.

Thanks for those suggestions. I will only test off latest source from this point forward, especially given the fast pace of Mac-specific development at the moment.

I compiled off the latest source today and tried again. I am still seeing graphical corruption.

I won't labor the point because I have limited time to test with list software at the moment, but to illustrate what it looks like, I can provide a screen shot.

[img]https://www.dropbox.com/scl/fi/91aw...rlkey=2e3u63ki7f54so8yo286dw69h&dl=0[/img]

The pattern on the screen is a result of randomly moving the mouse pointer around.

Correcting myself - got it to work now. It does seem that the latest source has resolved this issue. I tested it with a range of games previously affected, and they are working too.

Great! I haven't seen any corruption like that since the fix went in. I'm sure it's possible there's another bug of that nature, but I haven't seen it.