alancox=/dev/null
echo "
If you source this file into your Bash shell, and maybe other post-Korn
shells, it should make a VGA font file named RAWBIT.VGAfont, using no
programs external to Bash. RAWBIT.VGAfont is a degenerate font that's 9
lines high and each glyph is vertical bitbars in the pattern of the ASCII
value being displayed, plus a couple 7's and a blank line for visual
indexing. It allows you to turn your unix workstation into a big UPC
scandcode. RAWBIT.VGAfont is particularly good for studying things like
Linus Torvalds' coding guidelines.
The data and routines used are from osimplay, my x86 assembler written in
Bash, with which one can produce other binary oddities like OS kernels and
VESA VBE 3.0 interfaces. Actually compembling a font line-by-line ala X
bitmaps takes several minutes on a Pentium 1 in osimplay, but this
degenerate little doohicky doesn't take long.
Rick Hohensee
Precision Mojo Engineer
" > $alancox
declare -i H C
octalbyte=({0,1,2,3}{0,1,2,3,4,5,6,7}{0,1,2,3,4,5,6,7})
## several doodads to have meta listings notes
hex=({0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f}{0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f})
opnote ( ) { # internal =shasm
if test "$pass" = "2" ; then
echo -n " "$*" " >> $listing
fi
}
allocated=yes
output=RAWBIT.VGAfont
listing=/dev/null
pass=2
ab () { # assemble bytes. pass-sensitive. =shasm
if test "$pass" = "2" ; then
bytes $*
else
H=H+$#
fi
}
bytes ( ) { # internal =shasm
H=H+$#
for a in $* ;do
if test $(($a)) -gt 255 ; then
echo " H " $H ": index into hex[] > 255"
fi
if test "$allocated" = "yes" ;then
echo -en \\${octalbyte[$a&0xff]} >> $output
fi
if test $(($a)) -lt 0 ;then
let a=$a+256
fi
echo -n ${hex[$a]}" " >> $listing
done
}
let this=0
while test $this -lt 256 ; do
echo $this
ab $this $this $this $this $this $this 7 7 0
let this=$this+1
done
-
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This archive was generated by hypermail 2b29 : Mon Jun 30 2003 - 22:00:24 EST