INT 17 - NorthNet Jetstream API - PRINT DATA BUFFER FROM EXTENDED MEMORY
AH = F5h
CX = data buffer length
DX = printer port (0-3)
DS:SI -> data buffer (32-bit physical address)
Return: AX = status
0000h printer not ready (see also AH=02h)
other printing started

See also: 17F1

17F5 - NorthNet Jetstream API - PRINT DATA BUFFER FROM EXTENDED MEMORY