Revealing the HP-82242A IR Printer Module

[ThomasF]

(02-19-2024 04:30 PM)rprosperi Wrote:  Amazing stuff Thomas, thanks VERY MUCH for sharing the results of your curiosity and skills with the community. It has long been said among 41 fans that the last remaining big mystery was the inner-working of the Blinky, but now you've not only solved that mystery but also documented it in great detail, for others to learn and benefit from.

Thanks to you, Andrew, Christoph, Jean-Francois, Meindert and Mike, for earlier projects built upon here, and for their help in this important project!

Thanks Bob!

It is so fun and inspiring to dig into this with the new possibilities that this opens up!
I still remember the days when we built MLDL's from scratch, getting the latest tools from PPCJ or TN, and now "everything" can be done in software ...

I just made a small update to Blink.pdf above since I noticed that I had missed some info about some registers, and some other small corrections.

For anyone interesting in how the module works (with focus on the HW api), I recommend to check how TESTP is implemented.
When I started I thought that if I get TESTP to work, then everything would fall into place, and it did (at least to 98% ).
You will find the commented TESTP function in the second bank, starting at 0x6400.

Cheers,
Thomas