Creating a bitmap character set is tedious work. It needs to be assembled dot by dot from enlarged original printouts. Luckily, I did not have to do this. The bitmaps are copied from Christoph Gießelink's simulator, available here.
I performed my own validation with enlarged printouts, and found a number of differences
in the HP 82240A's Roman 8 character set (e.g. in the number "3", or the letter "J").
These have been changed to match the original printer.
TODO: Validate the two HP82240B character sets.
The original HP 82240A printer uses a modified HP Roman 8 character set. See Wikipedia for details. The successor HP82240B also supports this character set, in order to be compatible with the A model. Even though the B model supports the same charset, it is rendered quite differently. For example, all capital letters haven been shortened by one row compared to the A model.
The newer HP 82240B model additionally supports the "RPL" character set, see
Wikipedia. This character set is used by HP calculators that came after the HP 28,
such as the HP 48 or 50 series.
This character set is enabled with ESC-0xF9 and disabled with ESC-0xF8.
The "A" model ignores this escape sequence.
| HP 82240A Roman 8 | HP 82240B Roman 8 | HP 82240B RPL |
|---|---|---|
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The FOCAL character set (see Wikipedia) is
used by the HP 41C calculator and its printer, the HP 82143A. It contains 128 characters.
The simulator does not currently support this printer. The character set is part of the
class "HpPrinterFonts", but it's not currently in use. The bitmaps for the characters were
converted from the original printer ROM, see the CharRomToJavaArray.java file for more details.
| Focal Characterset |
|---|
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