This far more backwards than I'd originally thought. Check this out from the Service Manual on the gamba.
Screen Resolution
640x480, 800x600, or 832x624
1024x768 (only PC and PC-compatibles with a Mac/PC adapter)
Apple's Multiple Scan 15 Monitor had a higher resolution (SVGA) only available with a reverse VGA adapter on a PC? :
Screen Resolution
640x480, 800x600, or 832x624
1024x768 (only PC and PC-compatibles with a Mac/PC adapter)
Apple's Multiple Scan 15 Monitor had a higher resolution (SVGA) only available with a reverse VGA adapter on a PC? :