Tony, I don't see anything obviously wrong with your Fractint.cfg file. I use: - DOS Fractint in WinXP under VirtualBox, - Jonathan's FractSD, and - Richard's Fractint for Windows beta 5 but, I'm not familiar with FractInt for Windows version 20.99.8 Wait a minute! Richard's Fractint for Windows beta 5 is internally labeled: "Fractint version 20.99.8", so I *am* familiar with this version. For completeness, this is where I got Richard's program: https://tinyurl.com/Richards-Fractint-for-WinBeta5 or: https://legalizeadulthood.wordpress.com/2007/04/13/fractint-for-windows-beta -5/ I ran it just now and successfully used all these 256-color onscreen resolutions: 800x600 1024x768 1200x900 1280x960 Did you successfully run FractInt for Windows version 20.99.8 at higher resolutions than 800 x 600 under any earlier versions of Windows on your *Win 10* *computer* with the *same* graphics card? Did you successfully run FractInt for Windows version 20.99.8 at higher resolutions than 800 x 600 under any earlier versions of Windows on a *different* computer? It kind of smells like there's somethung going on with how FracInt for Windows version 20.99.8 interfaces with whatever video drivers you are using with your graphics card in Win 10. A standard thing to try is to check whether your graphics card manufacturer has any updated video drivers for your card... In the event of problems when trying another driver, it's supposed to be easy to roll back drivers, although I have not had occasion to do this myself. Another thing that I've not done myself, but might be useful, is to try the Windows 10 Compatibility Troubleshooter. I think it can provide some backwards-compatible environments for older programs. Invoke the Windows 10 Compatibility Troubleshooter by right clicking Fractint.exe and choosing: Troubleshoot compatibility. This video shows that being done: https://www.youtube.com/watch?v=Qjeu6hVi0tw It also show using a manual method with more visibility of the settings you are getting: right click the Fractint.exe and choose: Properties > Compatibility tab and make adjustments. I'd be interested to hear of the results of your: - possible video driver update, and < - - << (Check this first.) - compatibility Troubleshooting I'm leaning towards it being a video *card* or video *driver* compatibility problem... - Hal Lane ######################## # hallane@earthlink.net ######################## -----Original Message----- From: Fractint <fractint-bounces@mailman.xmission.com> On Behalf Of Tony Hanmer Sent: Friday, July 13, 2018 8:04 AM To: Fractint and General Fractals Discussion <fractint@mailman.xmission.com> Subject: [Fractint] Video mode limitations Greetings, I'm using FracInt for Windows version 20.99.8 in Windows 10. Here I seem to be limited to a max display size (though not a render size) of 800 x 600 pixels. My Fractint.cfg file is currently as follows: ; FRACTINT.CFG File ; Don't use TABs when editing this file. ; The driver field is required or the mode will be skipped. ; If the driver rejects the mode, it won't be added to the mode list. ;key name of adapter/mode | AX | BX | CX | DX |mode| x | y |clr| comments | driver ;=========================================================================== ============== F2 ,Win32 GDI Video , 0, 0, 0, 0, 19, 320, 240,256,,gdi F3 ,Win32 GDI Video , 0, 0, 0, 0, 19, 400, 300,256,,gdi F4 ,Win32 GDI Video , 0, 0, 0, 0, 19, 600, 450,256,,gdi F5 ,Win32 GDI Video , 0, 0, 0, 0, 19, 640, 480,256,,gdi F6 ,Win32 GDI Video , 0, 0, 0, 0, 19, 800, 600,256,,gdi F7 ,Win32 GDI Video , 0, 0, 0, 0, 19, 1024, 768,256,,gdi F8 ,Win32 GDI Video , 0, 0, 0, 0, 19, 1200, 900,256,,gdi F9 ,Win32 GDI Video , 0, 0, 0, 0, 19, 1280, 960,256,,gdi SF2 ,Win32 Disk Video , 0, 0, 0, 0, 19, 8192, 8192,256,,disk SF3 ,Win32 Disk Video , 0, 0, 0, 0, 19,16304,16304,256,,disk SF4 ,Win32 Disk Video , 0, 0, 0, 0, 19,30000,30000,256,,disk SF5 ,Win32 Disk Video , 0, 0, 0, 0, 19, 640, 400,256,,disk SF6 ,Win32 Disk Video , 0, 0, 0, 0, 19, 640, 480,256,,disk SF7 ,Win32 Disk Video , 0, 0, 0, 0, 19, 800, 600,256,,disk SF8 ,Win32 Disk Video , 0, 0, 0, 0, 19, 1024, 768,256,,disk SF9 ,Win32 Disk Video , 0, 0, 0, 0, 19, 1280, 1024,256,,disk CF1 ,Win32 Disk Video , 0, 0, 0, 0, 19, 8000, 8000,256,,disk CF2 ,Win32 Disk Video , 0, 0, 0, 0, 19,30000,22500,256,,disk CF3 ,Win32 Disk Video , 0, 0, 0, 0, 19,16304,12228,256,,disk CF4 ,Win32 Disk Video , 0, 0, 0, 0, 19,32608,24456,256,,disk CF5 ,Win32 Disk Video , 0, 0, 0, 0, 19, 8192, 6144,256,,disk But nothing past that 800 x 600 shows up in available video modes in FractInt. Any help, please? Many thanks, Tony Hanmer _______________________________________________ Fractint mailing list Fractint@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/fractint --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus