convert decimal input to english text output

[caramel]

well here's the code i ended up with:

; Take sequence of ASCII digits typed by user, call ASCIItoBinary subroutine for conversion, push binary value onto
; stack.
		.ORIG	x3000
INPUT		LEA	R0,PROMPT	;load prompt
		PUTS			;display prompt
		GETC			;read number
		OUT			;display number
		BRnzp	RangeCheck
PUSH	LEA	R1,ASCIIBUFF	;R1 points to string being
		LD	R2,MAX		;generated
VALUE		ADD	R3,R0,xFFF6	;test for carriage return
		BRz	GOOD		
		ADD	R2,R2,#0
		BRz	TooLarge
		ADD	R2,R2,#-1	;read more digits
		STR	R0,R1,#0	;store last character read
		ADD	R1,R1,#1
		GETC
		OUT			;echo
		BRnzp	VALUE
GOOD		LEA	R2,ASCIIBUFF
		NOT	R2,R2
		ADD	R2,R2,#1	
		ADD	R1,R1,R2	;R1 contains number of characters
		JSR	ASCIItoBinary
		JSR	PUSH
		BRnzp	INPUT
TooLarge	GETC			;loop until return
		OUT
		ADD	R3,R0,xFFF6
		BRnp	TooLarge
		BRnzp	INPUT

;ASCIItoBinary conversion
ASCIItoBinary	AND	R0,R0,#0	;R0 contains result
		ADD	R1,R1,#0	;test number of digits
		BRz	END		;no digits,terminate
		LD	R3,NEGOFF	;R3 gets xFFD0
		LEA	R2,ASCIIBUFF
		ADD	R2,R2,R1
		ADD	R2,R2,#-1	;R2 points to ones place
		LDR	R4,R2,#0	;load ones digit in R4
		ADD	R4,R4,R3	;strip off ASCII template
		ADD	R0,R0,R4	;add ones digit
		ADD	R1,R1,#-1
		BRz	DONE		;original number had one digit
		ADD	R2,R2,#-1	;R2 points to tens place
		LDR	R4,R2,#0	;R4 contains tens digit
		ADD	R4,R4,R3	;strip off ASCII template
		LEA	R5,TENS		;tens values
		ADD	R5,R5,R4	;R5 points to correct tens value
		LDR	R4,R5,#0
		ADD	R0,R0,R4	;add tens value to total
		ADD	R1,R1,#-1
		BRz	DONE		;number consists of two digits
DONE		RET

;routine to check that the magnitude of input is between 0 and 99.
RangeCheck	LD		R5,ZERO		
		ADD		R4,R0,R5	;R0 contais result being
		BRp		BAD		;checked
		LD		R5,NINETYNINE
		ADD		R4,R0,R5
		BRn		BAD
		ADD		R5,R5,0		;R5 <- within range
		RET
BAD		ST		R7,Save		;save R7
		LEA		R0,ERROR
		PUTS				;display error msg
		LD		R7,Save
		AND		R5,R5,#0
		ADD		R5,R5,#1	;R5 <- out of range
		BRnzp		INPUT

END		HALT
PROMPT		.FILL		x000A
		.STRINGZ	"?"
MAX		.FILL		x0003
NEGOFF		.FILL		xFFD0
ASCIIBUFF	.BLKW		4
TENS		.FILL		#0
		.FILL		#10
		.FILL		#20
		.FILL		#30
		.FILL		#40
		.FILL		#50
		.FILL		#60
		.FILL		#70
		.FILL		#80
		.FILL		#90
ZERO		.FILL		#0
NINETYNINE	.FILL		#99
Save		.FILL		x0000
ERROR		.FILL		x000A
		.STRINGZ	"Error: Number must be between 0 and 99."
		.END

i still don't know how to make the array, and i'm also confused on converting binary into english text to be displayed (i'm assuming this is done through the array).... also, it reports that number is out of range no matter what the input is... any suggestions?