ImageWriter #1
Custom Font Selection

Revised by Matt Deatherage (November 1988)
Written by Rilla Reynolds (October 1986)

This Technical Note documents an ImageWriter II firmware bug which affects custom font selection.


Due to an ImageWriter II firmware bug, the ESC ' command neither selects nor reselects custom font 1 after custom font 2 is selected, unless you fix an errant pointer with the following command sequence first:


    7-bit mode:    ESC  Z  00  20   ESC  D  00  20   ESC  '
    8-bit mode:    ESC  Z  00  20   ESC  '

The ESC ' command works correctly on an ImageWriter I, but the sequence above is also acceptable; therefore, it is in your best interest to always utilize the given sequence to select custom font 1. It is possible that the printer was initialized and custom font 2 was selected long before your program was launched.


This and all of the other Apple II Technical Notes have been converted to HTML by Aaron Heiss as a public service to the Apple II community, with permission by Apple Computer, Inc. Any and all trademarks, registered and otherwise, are properties of their owners.