Index for interrupt INT 51

Table of Contents by Order
51 - INT 51 - IRQ1 relocated by DESQview
51 - INT 51 - IRQ1 relocated by IBM 3278 emulation control program
51 - INT 51 - IRQ1 relocated by OS/2 v1.x
51 - INT 51 - TI Professional PC - RESTART TIMING EVENT
51 - INT 51 - Tandy 2000 - KEYBOARD SERVICES

INT 51 - IRQ1 relocated by DESQview
Range:	INT 51 to INT F9, selected automatically
Note:	this is the default location for older versions; see INT 50"DESQview"
	  for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 54"DESQview",INT 58"DESQview"

INT 51 - IRQ1 relocated by IBM 3278 emulation control program
SeeAlso: INT 50"IBM 3278",INT 54"IBM 3278"

INT 51 - IRQ1 relocated by OS/2 v1.x
SeeAlso: INT 50"OS/2",INT 54"OS/2"

INT 51 - TI Professional PC - RESTART TIMING EVENT
	AX = timer count in 25ms intervals
	DS:DI -> timing-event table (see #03244)
Note:	documented as "for system use only"; intended for multi-tasking
	  software
SeeAlso: INT 50"TI Professional",INT 52"TI Professional"

Format of TI Professional PC timing event table:
Offset	Size	Description	(Table 03244)
 00h	WORD	offset of next event table entry
 02h	BYTE	normally unused (FFh)
 03h	BYTE	flags:
		bit 7 set if timing event active
		bits 6-0 not used by BIOS (0), but could be used by option ROMs
 04h	WORD	timeout count (decremented every 25ms when active)
 06h	WORD	offset of event handler (in segment F400h) to call on event
		  timeout; the F400h segment allows addressing both system ROMs
		  and the first 16K of memory (due to the 1M memory wraparound)

INT 51 - Tandy 2000 - KEYBOARD SERVICES
Note:	this interrupt is identical to INT 16 on Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=01h,INT 16/AH=02h,INT 16/AH=04h"Tandy"
SeeAlso: INT 16/AH=04h,INT 4A"Tandy 2000",INT 4C"Tandy 2000",INT 52"Tandy 2000"