DOS ain't dead

VERIFY reimplementation (Announce)

posted by Guti , 15.09.2022, 06:29

> > I am not sure if it could be useful for anyone, but I have just
> > reimplemented VERIFY.COM by Peter Mikalajunas -1995-
> > (https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/verify/)
> in
> > pure assembler. It is not a big deal, but was a personal challenge. With
> > this main .COM executable gets reduced from 5,444 bytes to just 653
> bytes.
> >
> > Also I noticed that "original" VERIFY was not compatible with the
> internal
> > command, allowing only /ON or /OFF. My implementation works with ON and
> > OFF, but also with 1 or 0.
> >
> > Source code and binaries are available at:
> > https://sourceforge.net/projects/nikkhokkho/files/VERIFY/
> >
> >
> > ------------------------------------------------------
> > Javier Gutiérrez Chamorro
> > https://www.javiergutierrezchamorro.com
>
> Q: Does your implementation verify source/destination byte-for-byte
> or simply source/destination being of equal filesize ?

It simply enables DOS verification flag. Is at the level of the driver to do the verification itself.

---
Visit my personal blog at https://www.javiergutierrezchamorro.com

Complete thread:

• VERIFY reimplementation - Guti, 14.09.2022, 09:11 (Announce)
  • VERIFY reimplementation - rr, 14.09.2022, 20:48
    • VERIFY reimplementation - Guti, 15.09.2022, 06:28
  • VERIFY reimplementation - glennmcc, 14.09.2022, 21:26
    • VERIFY reimplementation - rr, 14.09.2022, 22:00
      • VERIFY reimplementation - glennmcc, 14.09.2022, 22:21
    • VERIFY reimplementation - Guti, 15.09.2022, 06:29