In the unlikely event that you own a Sharp MZ80K here is some free software for you to download.
This a program which I wrote myself and sold through SharpSoft at the princely sum of £5.85.  
It is described in the catalogue as follows.
PrintPlot
There are many graphics utility programs but Printplot's advanced features make it unique.
Essentially, the program enables the user to plot a static graphics display directly on the screen using enhanced cursor facilities.
Once complete, the program will automatically convert the display into a series of Print statements contained within a subroutine.
When required, the program can be instructed to delete itself, leaving only the display subroutines which can be incorporated into subsequent programs.
My agreement with Sharpsoft for this program was dated 17-8-1981.
(Link)
It is possible that this may be the world's first ever automatic code generator
and/or the world's first ever desktop interactive graphics program. It must at least be one of the first.
The download provides both an acoustic file (PrintMod.wav) which can emulate the signal output from a tape cassette
and an 'MZF' file (PrintMod.mzf) which is a Sharp MZ-series Emulator MZF Image.
Further details are provided in the download documentation.
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