Conflict between fullscreen and resolution autoswitch

[Leandro Jardim]

Today I ran WinUAE b16 and I have set the Amiga screen to Fullscreen, enabled VGA mode resolution autoswitch, and set resolution autoswitch to "Always on". Then I booted AmigaOS 3.9. When I started fMSX 2.3, for my surprise the screen began to "flash" like if the PC screen mode were being changed many times. Then I disabled VGA mode resolution autoswitch, and the screen stopped to flash. I think it was WinUAE trying to change the screen mode to DBLPAL, the screen mode I have chosen for the fMSX screenmode.

[Toni Wilen]

At least it is not DBLPAL or DBLNTSC. Unless they have been modified.

NTSC mode dblscan V=47.6085Hz H=27283.8077Hz (130x574+1) IDX=11 (NTSC) D=0 RTG=0/0
29-846 [1357 000-000]: D3D9Ex: 832*553 main texture, depth 32
29-846 [1357 000-000]: Buffer size (832*553) Native
29-849 [1357 000-000]: RTGFREQ: 574*47.6085 = 27327.3061 / 47.6 = 574
29-849 [1357 000-000]: BEAMCON0=1B88 VTOTAL=023D HTOTAL=0081
29-849 [1357 000-000]: HSSTOP=0015 HBSTRT=0001 HBSTOP=0021
29-849 [1357 000-000]: VSSTOP=000E VBSTRT=023E VBSTOP=0016
29-849 [1357 000-000]: HSSTRT=000B VSSTRT=0007 HCENTER=004B
29-849 [1357 000-000]: HSYNCSTART=0083 HSYNCEND=0020

Find the exact mode that creates these log lines.

[Leandro Jardim]

That is very strange because I removed all monitor drivers from DEVS:Monitors except PAL, NTSC, DBLPAL, DBLNTSC before starting WinUAE to generate the log.

I opened the fMSX preferences and the screen mode that it open at start is DBLNTSC LowRes, and not DBLPAL. It is configured to use only the DBLNTSC variants (all of them). I dont understand why I said DBLPAL at principle (maybe because it is the most common that I use).

[Toni Wilen]

It can't be normal DBLNTSC because refresh rate should be about 60Hz, not 47.6Hz that your log shows.

Do you get same parameters in log file if you select same mode in WB? Or some paint program or something.

First step is to confirm if it is the mode or something to do with fMSX.

[Leandro Jardim]

Originally Posted by Toni Wilen

Do you get same parameters in log file if you select same mode in WB?

With Workbench I get screen flashes too, but not the same parameters in log file. The refresh rate is now at 57 Hz. And, for some reason fMSX was outputting 47 Hz, but I did another log and now it outputs 57 Hz, which is the real refresh rate. I have made two new logs, one for Workbench and another for fMSX for you.