Sunday, 8 March 2026

QBX: File I/O! More generally, DOS INT 21h!

All has been quiet on the QBX-tern front, as one might say, for a few weeks now. The reason is that I've been coding my butt off creating an INT 21h DOS API interrupt emulation layer and a test suite that exercises every single function. I finished that a few days ago, and now QBX implements file I/O on top of that:

Since QBX implements file I/O using the emulation layer, it should be possible for a program that mix-and-matches QuickBASIC's file access abstraction with DOS interrupt calls to work.

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