8-bit Software (c) Duncan Webster April 1992 
    Issue 19 (c) April 3rd 1992. 
     
    PRINTING HASH CHARACTERS (user guide) 
    Program = HashGen. 
     
    This Basic program generates a machine code program to enable a 
    parallel printer with software selection of national character sets 
    to correctly print CHR$(35) as 'hash' and CHR$(96) as 'pound' on 
    both screen and printer. 
     
    The machine code program sits at &900 and works with any language 
    or application which does not make use of page &9. Its name is 
    chosen by the operator when it is assembled by the Basic program. 
     
    The routine is loaded by typing *<filename> when it is immediately 
    enabled. This should be done when the printer is disabled and the 
    ENGLAND character set selected. The routine can be temporarily 
    disabled by function key f0 (giving the screen message '*CODE 0'), 
    following which it may be re-enabled by function key f1 (giving the 
    screen message '*CODE 1'). These keys should only be used while the 
    printer is disabled. Alternative function keys may be specified by 
    altering lines 680 and 690 in the Basic program. 
     
    The machine code program will be corrupted by any use of page &9, 
    e.g., by any use of the series port or the cassette port, or by the 
    presence of any other machine-code routine using that page. It will 
    not work in the presence of a program denying use of the command 
    line vector. It should also be noted that the program alters the 
    contents of both the user vector and the write-character vector, 
    which may give rise to incompatibilities. Problems may also be 
    expected if used with those VIEW printer drivers which include a 
    'pound' printing function.  This last difficulty can be avoided by 
    disabling the routine, with function key f0, when in VIEW's command 
    screen. 
     
    The program is disabled by <BREAK>, when it will be found that a 
    'Bad Command' message will be produced if function key f0 or f1 is 
    pressed. (This is due to vectors defaulting.) The program may 
    normally be re-activated by entering <CALL &900>, if necessary 
    after first re-entering Basic. 
     
    Dr. H. Clarke.