HP-19C Repair Odysee

[teenix]

Interesting :-)

My method has a specially generated character "ROM" inside the controller which was easy to create.

When required, the preconfigured data is placed in a print buffer and then output to the heads with PWM as determined by the battery voltage. The characters are automatically in italic and properly spaced. This way the code for actual printing is quite small.

The PIC output to the heads is shown in this post.

https://www.hpmuseum.org/forum/thread-12...#pid130620

cheers

Tony