Describe the bug
Hercules WriteOn! program has rendering issues:

I've been looking for examples on how really looks, and found this capture (I don't own a real Hercules InColor)

To Reproduce
Steps to reproduce the behavior:

1. Create a machine with an Hercules InColor as video card, 386 processor and 4 Mb of RAM. Install DOS 6 on it.
2. Download Hercules InColor disks from: http://www.dosdays.co.uk/media/hercules/incolor/hercules_incolor.zip
3. Mount floppy writeon1.ima on floppy drive A:
4. Execute command "WON SAMPLE.DOC"

Expected behavior
The WriteOn! program should display correctly without issues

Desktop (please complete the following information):

• OS: Windows 10
• 86Box version: 4.0 build 4755
• Build information: old dynarec, 64-bit executable

Additional context
I've also tested this program on DosBox-X, the screen looks fine (no menu or border issues) but there is no color.