Function Name: VECTOR

Purpose: Initialize and copy indirects
Call address: $FF8D (hex) 65421 (decimal)
Preparation:

	Registers:	.X = adr (low) of user list
			.Y = adr (high) of user list
	Memory:		system map
	Flags:		.C = 0 -> load Kernal vectors
	 		.C = 1 -> copy Kernal vectors
	Calls:		none

	Registers:	.A used
			.Y used
	Memory:		as per call
	Flags:		none

Description: VECTOR reads or writes the Kernal RAM indirect vectors. Calling VECTOR with the carry status set stores the current contents of the indirect vectors to the RAM address passed in the .X and .Y registers (to the current RAM bank). Calling VECTOR with the carry status clear updates the Kernal indirect vectors from the user list passed in the .X and .Y registers (from the current RAM bank). Interrupts (IRQ and NMI) should be disabled when updating the indirects. See also the RESTOR call

Example:

	LDX	#save_lo
	LDY	#save_hi
	SEC
	JSR	$FF87	;copy indirects to "save"