Thanks for clarifying.
The strange thing is that KQ4 actually has an official patch consisting of VIEW.XXX files, which doesn't specify it is meant only for specific versions... Does the early SCI0 interpreter take notice of these, or the patch is actually meant for the later SCI0 (Late) versions?
It is for the later version. Here is a printout of the read.me file:
BUG in latest KQ4 for IBM (512) - 8 disk version
Bug 1: If the user is playing on a 386 based machine or a very fast 286
machine, he will not be able to enter room 24 (waterfall).
To correct this, the user can do the following as a temporary fix.
In any room prior to entering room 24, enter debug by hitting
both shift keys and the numeric pad minus (-) key.
Type in a "g".
Type in 223 and press Enter. User should then see a window
saying "Global = 223" A value of "2" will show in the lower
portion of that window.
Press the backspace key to erase the "2".
Type in a "1" and press Enter.
Press a capital "D" (Shift D) to exit debug.
Only play on games saved after doing this.
For a more permanent fix, the user can copy view.653 from this disk
onto the KQ4 3.5 inch disk labeled volume 3, or the 5.25 inch
disk labeled disk 4.
Bug 2: If a player has not finished getting the hen and delivering it to
Lolotte before night falls, he will get an error when leaving
Lolotte's castle (and possibly other times). To correct this,
copy view.997 on this disk to 3.5 inch disk 3 or 5.25 inch disk 4.
I suffered from the first bug myself back in the day, as I had bought a slash copy of the game years after its release. I needed to order a patch disk from Sierra.