Add PRINTER_1526

[mist64]

From https://www.zimmers.net/anonftp/pub/cbm/src/printer/1526.zip

This is in the source format used by Dennis Jarvis.

[mist64]

This script does the bulk of the conversion:

import sys

def process_file(filename):
    with open(filename, 'rb') as f:
        for line in f:
            processed = []
            for c in line:
                if c == 0xa0:
                    processed.append(32)
                elif c == 0x0d:
                    processed.append(10)
                else:
                    if 65 <= c <= 90:
                        processed.append(c + 32)
                    elif 97 <= c <= 122:
                        processed.append(c - 32)
                    else:
                        processed.append(c)
            sys.stdout.buffer.write(bytes(processed) + b'\n')

if __name__ == '__main__':
    if len(sys.argv) != 2:
        print("Usage: python script.py <filename>")
    else:
        process_file(sys.argv[1])