Download Ipso Facto Issue 5

4.
locations #3C through #3E output the 3 bytes from the
output table.
.
5. locations #3F through #43 check the digit select byte.
If it is zero (ie. the select bit has been shifted'out)
then all g digits have been output and the subroutine
returns to the callinp, program, otherwise the loop is
repeated for another digit.
APPLICATIONS AHD EXTZ!'JSIONS
The display hardware and software forms a general purpose output
device. Some possible applications that come to mind are:
-
clock display (hh-mm-ss and mm-dd-yy)
multi station thermometer display (indoor outdoor etc.)
games of course (winning ticket number etc.)
monitor data display (address, data, function)
test gear (volt, ohm, current, frequency, etc. display)
and on and on and on ••••••••••
Some possible extensions are:
- decimal point selection (high order data bit set maybe)
- additional characters (ie. H, J, L, 0 (small), P, U and
some s tr-ange ones,. .., =
II
= j., )
Extra characters could easily be added by using the low order 5
bits of the data byte and expanding the character table out to 32
bytes.