Macintosh LC MacsBug Video Issue

Hi everyone! I need to run MacsBug on my Macintosh LC to gather some low-level hardware information, but when I try to run 6.2.2, I get a lot of strangeness on my screen.

My current setup:

Macintosh LC
FPU Card Installed
512KB VRAM
BlueSCSI (external)
MacOS 7.1.2

I tried in both 640x480 and 512x384.

I'm using a 10-DIP DB15 to VGA adapter and a RetroTink 4K, and everything seems to be displayed normally in all other screens other than MacsBug.

This machine was recently revived as well, everything seems to be working really well aside from this.

Am I doing something incorrect?

Here is a photo at 640x480. I've tried tweaking settings on the RetroTink 4kCE to no avail, I believe this might be a Mac LC issue or a software thing.

I've tried removing the mxbc resource from the preferences (Debugger Prefs, located inside of the System folder, beside MacsBug) but that doesn't seem to work.

This is my first time working with MacsBug, thanks so much!
 

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  • macsbug video glitch on macintosh lc.jpeg
    macsbug video glitch on macintosh lc.jpeg
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