)
Call VioWrtCharStrAttr with:
	STACK:	WORD	VIO handle (must be 00h)
		DWORD	pointer to attribute to be applied to each character
		WORD	column at which to start writing
		WORD	row at which to start writing
		WORD	length of character string
		DWORD	pointer to character string to write
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:	write wraps at end of line and terminates if it reaches end of screen