Index for interrupt INT 70

Table of Contents by Order
70 - INT 70 C - IRQ8 - CMOS REAL-TIME CLOCK
70 - INT 70 - VIRUS - "Stupid" - ORIGINAL INT 21h VECTOR

INT 70 C - IRQ8 - CMOS REAL-TIME CLOCK
Desc:	this interrupt is called when the real-time clock chip generates an
	  alarm or periodic interrupt, among others (see CMOS 0Bh).  The
	  periodic interrupt by default occurs 1024 times per second.
Notes:	many BIOSes turn off the periodic interrupt in the INT 70h handler
	  unless in an event wait (see INT 15/AH=83h,INT 15/AH=86h).
	may be masked by setting bit 0 on I/O port A1h
SeeAlso: INT 08,INT 0F"HP 95LX",INT 15/AH=01h"Amstrad",INT 15/AH=83h
SeeAlso: INT 15/AH=86h,INT 1A/AH=02h,INT 58"DESQview",MEM FEE00320h
SeeAlso: MEM 0040h:006Bh

INT 70 - VIRUS - "Stupid" - ORIGINAL INT 21h VECTOR
Note:	the virus sets this interrupt to be the same as INT 21, and then
	  performs only INT 70 calls; since INT 70 is also generated by the
	  real-time clock on the PC/AT and higher, this could cause random
	  actions on an infected system
SeeAlso: INT 6B"VIRUS",INT 9E"VIRUS",INT E0"VIRUS"