HP-19C Repair Odysee

[PANAMATIK]

The newPIK chip is printing to the HP82240B printer!

I made the first successful print lines to the HP82240B printer. The output is the same as the HP-19C thermo printhead would produce. The print line data is assembled by the original HP-19C ROM code in the ACT c register and sent from the ACT to the newPIK prototype. Last week I used the PIC serial interface and had to make some extra cable connections between the two chips, now I use the original communication lines. The communication is preliminary done through the ISA (Instruction/Address) line. When I receive the PIC16F18877 processor next week with 2xSPI interface I can use the DATA line for communication, which is then like the original.



The prototype setup, left the HP-19C hardware with newACT, right the newPIK



Some prototype print lines (with some hickups for now)

The partially corrupted print lines are timing errors, which will be no problem to correct. This was just my first try of testing IR printing, which I started today, and to verify, that the Data is sent correctly from the ACT to the PIK.

Bernhard