INT 21 - LANtastic v3+ - GET PRINTER STATUS
AX = 5FA3h
BX = physical printer number (00h-02h = LPT1-LPT3, 03h-04h = COM1-COM2)
DS:SI -> buffer for printer status (see below)
ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
CF set on error
AX = error code
BX = next physical printer number
Note:   you must be logged in to the specified server

Format of printer status:
Offset  Size    Description
00h    BYTE    printer state
bit 7: printer paused
bits 0-6: 0 printer disabled
1 will stop at end of job
2 print multiple jobs
01h    WORD    queue index of print job being despooled
FFFFh if not despooling--ignore all following fields
03h    WORD    actual characters per second being output
05h    DWORD   number of characters actually output so far
09h    DWORD   number of bytes read from spooled file so far
0Dh    WORD    copies remaining to print


215FA3 - LANtastic v3+ - GET PRINTER STATUS