3D2-Lab4/App.s at master · dslogget/3D2-Lab4 · GitHub

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	AREA	AsmTemplate, CODE, READONLY
	IMPORT	main


; (c) Mike Brady, 2011 -- 2019.
	EXPORT	start
	INCLUDE		REG_DEFS.s
	IMPORT 	Display
	IMPORT 	CLKINIT
	IMPORT 	INTHAND
	IMPORT MSCNT
	IMPORT SCNT
	IMPORT MICNT

;R=17 B=18 G=21

;Main loop
start
	BL	CLKINIT
	LDR R0, =VICDEFVECTADDR
	LDR R1, =INTHAND
	STR R1, [R0]
	LDR R0, =VICINTENABLE
	LDR R1, =(2_1 << 4)
	STR R1, [R0]
	LDR R0, =SCNT
	LDR R2, =0
	LDR R3, =8
	LDR R4, =LUT
	LDR R2, =0x260000
	LDR R5, =IO0DIR
	STR R2, [R5]

	LDR R5, =IO0CLR
	LDR R6, =IO0SET


LP
	LDRB R1, [R0]
	CMP	R2, R1
	MOV R2, R1
	BEQ LP
	BL Display

	STR	R7, [R6]
	LDR	R7, [R4, R3]
	STR R7, [R5]

	SUBS r3, #4
	LDRCC	r3, =8
	B LP

LUT	DCD	1<<17
	DCD	1<<21
	DCD	1<<18


stop B stop
	END