INT 6F - 10NET - SPOOL/PRINT
        AH = 0Eh
        DS:DX -> spool/print record (see below)
Return: CF clear if successful
        CF set on error
            AX = error code (see also AH=00h)
                17FFh device not mounted
                18FFh already spooling to named device

Values for operation code:
 0000h  initiate spool
 0001h  abort print
 0002h  close spool
 0003h  delete spool
 0004h  print
 0005h  get report info
 0006h  set chat template
 0007h  queue
 0008h  return queue
 0009h  queue non-spooled file for printing

Format of Spool/Print record:
Offset  Size    Description
 00h    WORD    operation code (see above)
 02h 11 BYTEs   file name in FCB format
---if operation code = 00h or 06h---
 0Dh    BYTE    notification flags (see below)
 0Eh    BYTE    days to keep (FFh=forever)
 0Fh    BYTE    bits 0,1: device (1=LPT1)
                bits 4-7: remote drive to store spool file (1=A,...)
 10h    WORD    length of following data area
 12h  N BYTEs   up to 64 bytes of description
---if operation code = 03h---
 0Dh  8 BYTEs   user ID to associate with filename
---if operation code = 04h---
 0Dh    WORD    block number
 0Fh  8 BYTEs   user ID to associate with filename
---if operation code = 05h---
 0Dh    BYTE    RRN to start retrieve
 0Eh    BYTE    bits 0,1: local print device (LPTx)
                bit 3: if set, return entries for all users
 0Fh    WORD    length of following area
 11h  N BYTEs   up to 1500 bytes to receive $SCNTL records returned
---if operation code = 07h---
 0Dh    BYTE    queue number
 0Eh    BYTE    bits 0,1: local print device (LPTx)
 0Fh    WORD    number of bytes of test print to be done
 11h    BYTE    code: 01h print device
                      02h test print count
                      03h prn
---if operation code = 08h---
 0Dh    BYTE    queue location or $SCNTL location to start access
                        returns next item for access:
                                00h-7Fh queued items
                                80h-FEh non-queued, non-printed items
                                FFh     no more items
 0Eh    WORD    unused
 10h    WORD    length of following area
 12h  N BYTEs   up to 64 bytes to receive $SCNTL records
---if operation code = 09h---
 0Dh  3 BYTEs   unused
 10h  N BYTEs   path to non-spooled file to be queued for printing

Bitfields for notification flags:
 bit 7  queue to top
 bit 6  do ID page
 bit 5  no form feed
 bit 4  reserved
 bit 3  explicit queuing only
 bit 2  notify at print completion
 bit 1  notify server operator, with reply
 bit 0  notify at print start

Format of $SCNTL record:
Offset  Size    Description
 00h  8 BYTEs   user ID
 08h 11 BYTEs   filename in FCB format
 13h  6 BYTEs   node ID
 19h  3 BYTEs   creation date
 1Ch    BYTE    notification flags (see above)
 1Dh    BYTE    retention time in days
 1Eh    BYTE    printing device (LPTx)
 1Fh  3 BYTEs   date last printed (0 = never)
 22h    BYTE    device containing spoolfile
 23h    WORD    bytes to print for test print
 25h    WORD    block number to start print
 27h    BYTE    reserved

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