INT 68 - APPC/PCIBM PC - CONVERT
	AH = FBh
	DS:DX -> control block (see #03707)
Return: control block updated


Format of APPC/PCIBM PC "CONVERT" control block:
Offset	Size	Description	(Table 03707)
 00h 12 BYTEs	reserved
 0Ch	WORD	1A00h (verb "CONVERT")
 0Eh  6 BYTEs	00h
 14h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	(big-endian) return code
 18h	BYTE	conversion
		00h ASCII to EBCDIC
		01h EBCDIC to ASCII
 19h	BYTE	character set
		00h AE
		01h A
		02h G
 1Ah	WORD	length of string to convert
 1Ch	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to source
 20h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to target