These services can be invoked using int86() function.
PRINT SCREEN
Interrupt : 0 × 5
Returns : Nothing
Use : Sends contents of the screen to the printer
INITIALIZE PRINTER
Interrupt : 0 × 17
Input : AH = 0 × 01
DX = Printer number
(0 = LPT1, 1 = LPT2, 2 = LPT3)
Use : Initializes the printer
MEMORY SIZE
Interrupt : 0 × 12
Input : Nothing
Returns : AX (memory size)
READ DISK CONTROLLER
Interrupt : 0 × 13
Input : AH = 0 × 0
DL = drive
0 × 00-0 × 7F Floppy disks
0 × 80-0 × FF Hard disks
SET CURSOR SIZE
Interrupt : 0 × 10
Input : AH = 0 × 01
CH = Starting Scan line
CL = Ending Scan line
Use : Changes the cursor size.
SET CURSOR POSITION
Interrupt ...
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