I bet the installer is using the storage JS API or something related but the pksfx x86 code does not and such API is buggy or limited on Safari mobile.
The only thing I can think of is running out of virtual disk space because the storage JS API quota is filled. But I would assume PKSFX calculates the CRC based on the in-memory decompressed stream, not a read-back copy of what's written. Or it would print some sort of "out of disk space" error, but maybe dosbox does not have that.
So I wonder if there is a sneaky data corruption bug hiding in the iOS version of Safari's JS/JIT engine here..? If the .zip file embedded in the PKSFX INSTALL.EXE was incomplete, then I would think it would fail early with a missing end-of-archive TOC?
