SPECGIF4.PRG converts Spectrum .SPC or .SPU files to GIF files,
320x200x256 colors. When you start the program a dialog box comes up;
it has 3 options: interlace, non-interlace and quit. You'll get
exactly the same GIF picture whether you choose interlace or not; it
only affects the order in which scan lines are stored (interlace
allows you to view a picture online before it was completely
transmitted).

      Next comes the load file selector. Choose you Spectrum picture.
Conversion takes about 7-8 seconds and then you get the save file
selector. You can simply click OK, since the program automatically
changes the filename extension to .GIF . Note that if you change the
pathname when saving, it's remembered separately from the load
pathname. Makes it easy when you want to convert a lot of pictures,
let's say from SPECTRUM folder to GIF folder. When the file is saved
you return to the startup dialog box; you can choose to continue or
quit.