Solution:

One customer report this printer problem and solved by V2.10 BIOS. On PCM-5860 boards with OS/2 Warp 3 the printer doesn't work in interrupt mode. (Printer prints only one character and then stands still. Printer works fine in polling mode but that cannot be accepted by the customer.) BIOS settings are standard on IRQ 7. The problem is now solved. PCM 5860 card with a BIOS version before 2.10.