; H e l l o W o r l d ; 48 65 6C 6C 6F 20 57 6F 72 6C 64 START LDM $4 ; High nibble of letter 'H' WRR ; Write to ROM output port LDM $8 ; Low nibble of letter 'H' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'e' WRR ; Write to ROM output port LDM $5 ; Low nibble of letter 'e' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'l' WRR ; Write to ROM output port LDM $C ; Low nibble of letter 'l' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'l' WRR ; Write to ROM output port LDM $C ; Low nibble of letter 'l' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'o' WRR ; Write to ROM output port LDM $F ; Low nibble of letter 'o' WRR ; Write to ROM output port LDM $2 ; High nibble of 'space' WRR ; Write to ROM output port LDM $0 ; Low nibble of 'space' WRR ; Write to ROM output port LDM $5 ; High nibble of letter 'W' WRR ; Write to ROM output port LDM $7 ; Low nibble of letter 'W' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'o' WRR ; Write to ROM output port LDM $F ; Low nibble of letter 'o' WRR ; Write to ROM output port LDM $7 ; High nibble of letter 'r' WRR ; Write to ROM output port LDM $2 ; Low nibble of letter 'r' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'l' WRR ; Write to ROM output port LDM $C ; Low nibble of letter 'l' WRR ; Write to ROM output port LDM $6 ; High nibble of letter 'd' WRR ; Write to ROM output port LDM $4 ; Low nibble of letter 'd' WRR ; Write to ROM output port END JUN END