DOS ain't dead

I got GPF under WinXP NTVDM when I try to open any text file from menu.

FPC General Protection Fault at eip=0030B766
eax=000012C8 ebx=0019FAC0 ecx=00000064 edx=00000000 esi=001BDA10 edi=000A0BE6
ebp=FFFFFFFF esp=0015326A program=H:\BLOCEK.173\BLOCEK.EXE
cs: sel=01A7  base=02D50000  limit=0036FFFF
ds: sel=01AF  base=02D50000  limit=0036FFFF
es: sel=01AF  base=02D50000  limit=0036FFFF
fs: sel=01CF  base=00000000  limit=0010FFFF
gs: sel=01CF  base=00000000  limit=0010FFFF
ss: sel=01AF  base=02D50000  limit=0036FFFF

Call frame traceback EIPs:
  $0030B766

Also F-keys doesn't work like F3 for open file, I can open only via mouse. I remember that some older version worked under NTVDM without problems. Now I have only older version 1.71 handy that cause NTVDM unhandled exception 0D dialog window when open file but at least F-keys worked there. I have set config set quite conservative:
se_simd = 0
use_mmx = 0

screen_width = 1024
screen_height = 768
use_vesa3 = 0        ;0=disable VESA3 functions, else use VESA3 if available
use_lfb = 0          ;0=never use linear frame buffer (LFB); 1=use LFB if available


EDIT: when filename is passed via cmdline param (like INFO.BAT) it opens but even arrow keys doesn't work and prints some regular characters.
I found even older version 1.62 that works fine under NTVDM

Under MS-DOS 6.22 the version 1.73 works except mouse wheel scrolling. I can see only scrollbar on right side moving when wheeling but main screen is still. In version 1.71 under DOS scrolling worked normally...

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DOS gives me freedom to unlimited HW access.

> Today I released a new version of my text editor and image viewer Blocek.
> The project page with download links is
> here.
Even with this new version (and the Win XP keyboard patch) posted above, Blocek still freezes for me when I go to "New File" and start to type. Nothing appears on the screen, and the system freezes so that a re-boot is necessary. I can open a PNG file OK, but when I open an existing text file, the file opens and I can't scroll the mouse, or enter any text. Freeze. This behavior has been the same on all my Dell laptops since at least Blocek 1.60. Does not appear to be a memory problem or a CWSDPMI error, as no error or sigserv occurs, just the freeze when attempting to enter text on keyboard.