The trouble with passive generators is you must maintain the code by hand forever more, as a passive generator will not update the generated code.
被动生成方式的缺憾在于开发者必须要手工维护生成的代码，因为生成工具不会再对生成好的代码进行更新了。
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When the conventional pacemaker generates a pulse to pace the right hand side of the heart, this is detected by the pulse-generator and a pulse is sent to stimulate the left hand side of the heart.
Rather than draw out a character generator structure by hand, I've borrowed font_acorn_8x8.c from the Linux kernel (this is part of the framebuffer driver tree).