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10 GOSUB 4000 : REM initialize
20 GOSUB 4100 : REM cursor off
30 T$ = "Hello, World"
40 GOSUB 4500 : REM print string
999 GOTO 999
4000 OUT 0, &H30 : REM 2 lines, 8-bit
4010 OUT 1, &H0 : REM max brightness
4020 GOSUB 4299
4030 OUT 0, &H0F : REM Display on, cursor blinking
4040 RETURN
4099 REM turn cursor off
4100 OUT 0, &H0C : REM display on, cursor off
4110 RETURN
4299 REM clear screen
4300 OUT 0, &H01 : REM Clear display screen
4310 RETURN
4399 REM goto X, Y
4400 DA = &H80 + (&H40 * Y) + X
4410 OUT 0, DA
4420 RETURN
4499 REM print string
4500 FOR I=1 to LEN(T$)
4510 OUT 1, ASC(MID$(T$, I, 1))
4520 NEXT I
4530 RETURN
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