Sorry to resurrect this guys but does anyone have a possible solution? I just tried to play The Perfect General and came across the same issue.

When playing a large map scenario if you scroll the map up towards the top of the screen you get the top line of the screen repeated over the whole view as per the pic in the previous post. Scrolling other directions seems to be fine though.

The scrolling (up) issue appears to be in video hardware and/or video memory emulation. Loading a video BIOS and booting real DOS do not make a difference; no calls are made to INT 10h for the scrolling. The problem is not seen in Bochs or the NTVDM. Scrolling text windows are also affected, such as the help option on the main menu, which is easy to get to.

It seems the issue is in CPU emulation with normal core, not video emulation. I really wasn't expecting to find a significant CPU bug at this point. Anyway, use the core=dynamic setting as a workaround.

Hi ripsaw8080, thanks for taking the time to look into this.

I tried changing core to dynamic as you suggested but it still didn't work for me. I then tried playing with other config options and trying with Daum but still no joy. What config setup are you using when it works properly for you?

Default settings, then type the command "core dynamic" before running the game. I don't think the settings make much difference; the display glitch is caused by a CPU bug. If dynamic core doesn't get rid of the glitch for you, perhaps it works differently on your system than mine, in which case you may have to wait for a fix to be committed in SVN.

Looks like ill have to wait till the next svn.

I reset the options all back to default, did as you suggested with typing core dynamic before running the game but still the same issue for me. C'est la Vie.

Again, thanks for your assistance.

What CPU, OS, and version of DOSBox are you using?

Im on an AMD Phenom II X4 955 (slightly overclocked), Windows 7 Ultimate with SP1 and Dosbox 0.74

Is that a 64-bit edition of Windows 7? If so, that may explain why core=dynamic works for me but not for you.

Sorry should have mentioned that. Yes, its 64-bit Win7.