Those of us who have ADM-3A or similar terminals which
use CTL-Z as the screen clear have a problem with some
software (like the Peachtree business software) which imbeds
screen clear characters in the data files on disk. The CTL-
Z is a 1A hex, which is the same as CP/M's end-of-file
character.
In the past, the solution to this problem has been to re-
write the software to use some other character in the file,
and then converting it to the screen clear before printing.
I recently saw a message about this on another system
which made me say to myself "why didn't I think of that?"
..simply add in the value for bit 7 as being high instead
of low! In other words, instead of defining the screen
clear in the program as CHR$(26), make it CHR$(154). Most
terminals ignore the parity bit, so this is interpreted the
same as a CHR$(26) !
If your terminal does not ignore the parity bit, you can
still use this trick if you reassemble your CBIOS, adding
ANI 7FH just ahead of the output to your console port in the
CONOUT routine.
