DELTA ROW printing

[RWAP]

One of the highest compressions used by later Epson ESC/P2 printers, was Delta Row compression.

We have recently been testing this and found that when printing sample data from the Sinclair QL LineDesign program there were issues in interpreting the data.

We wrote a colour driver for LineDesign which uses the Delta Row compression in the early 1990s, so it was a good test (as we no longer have access to an Epson printer which supports this).

We have made some changes to the Epson emulation for the Retro-Printer software to address these issues, and this will be included in the next software release.